1 D1. SBS (New Version)
- 1.1 Sample of new RPM structure with classes of text)
  - 1.1.1 NOTE: Content has been edited only minimally
2 1. Introduction
3 2. Definitions and Terminology
- 3.1 2.1 COMPOSITION
- 3.2 2.2 PERFORMANCE
4 3. RCABC (RoofStar) Guarantee Standards, Policies, Recommendations and Reference Materials for SBS Systems
5 4. SBS Roof Systems: Accepted Materials
6 5. SBS Application and Safety: Best Practices
7 6. SBS Master Specifications
8 7. SBS Construction Details

1 D1. SBS (New Version)

1.1 Sample of new RPM structure with classes of text)

1.1.1 NOTE: Content has been edited only minimally

2 1. Introduction

SBS-modified roofing membranes, often referred to as "SBS roofing" or simply as "SBS", are relative new-comers to the world of modified bituminous roofing products. SBS-modified roofing membranes comprise a substantial portion of the flexible membrane market, which has largely replaced traditional built-up roofing felts. While offering the higher performance and versatility of a flexible membrane, SBS-modified roofing membranes are also generally compatible with asphalt products, and are therefore useful for re-roofing.

SBS-modified roofing membranes are just one type of modified bituminous roofing. They are flexible membranes manufactured in rolls and are thermoplastic in nature but display variable elastomeric properties, primarily because of the modifiers blended with the bitumen. These membranes are generally manufactured using three materials: (1) modified bitumen, (2) reinforcement fibers, commonly woven as a sheet and embedded within the membrane (these fibers may be glass, polyester, or a blend of the two), and (3) a surface coating, such as stone or ceramic granules. The performance of these membranes (for example, their flexibility or ability to retain their shape under higher temperatures) may be compromised by subtle, seemingly inconsequential changes in composition.

The formulation of the bitumen is critical, particularly when its physical properties are modified by the addition of polymers. Bitumen is most commonly modified with styrene butadiene styrene (SBS) or atactic polypropylene (APP; see separate section in this Manual). The manufacturer must ensure that a suitable degree of compatibility exists between the bitumen and the polymer and that a thorough mix has been obtained. The careful selection and combination of bitumen and polymer (the type of modifier, the percentage of polymer used, etc.) determines the physical properties and long term performance of the modified bituminous “binder” (the meaning of this sentence is unclear; what exactly is the 'binder' and how is it related to the bitumen and polymer used to modify the bitumen? - isn't the "binder" the same as the polymer such as SBS or APP, or is it something else? The structure of this sentence suggests that the polymer and the binder are actually two different things). The binder provides the membrane with its waterproofing capability and may impart the following properties:

low temperature flexibility
elasticity
high temperature resistance to flow
resistance to aging

The bitumen utilized for oxidized bituminous membranes has been “blown” (clarify), similar to roofing asphalt (see Section 3.9.1). This produces a higher softening point and, therefore, a more useful temperature range. (This means what? That the membrane can be applied using a wider spectrum of temperatures? That it retains its shape under higher temperatures? If so, then let's say that, i.e. "Injecting oxygen into the bitumen results in a higher softening point, which makes installation easier and means the membrane will retain its shape under higher temperatures".)

The physical properties of the binder are further enhanced by applying it to or embedding it in a carrier or reinforcing mat, most commonly a textile such as:

non-woven spun-bonded polyester
woven polyester scrim
fibreglass mats
woven fibreglass cloth
combinations of the above

The type of reinforcing selected depends on the end use and desired physical properties of the finished products. The weight, quality, tension during manufacturing, and method of saturation and coating of the reinforcing are some of the factors governing the final product's performance. Some polyester modified membrane manufacturers use oxidized bitumen to saturate the reinforcement, particularly when “heavyweight” material is used.

Membranes are usually surface treated with a parting agent so they do not stick in the roll. Surfaces that will be hot asphalt applied are usually sanded while torch-applied surfaces use polyethylene or other thermofusible films (materials that can be bonded with heat). Exposed surfaces may be embedded with mineral granules (usually ceramic chips or slate flakes) or laminated with metal foil for ultra-violet protection. As an alternative on roofs with minimal slopes, a pour coat and gravel surfacing may be installed over some membranes, although this makes the quality of application difficult to inspect and may lead to problems with membrane slippage due to the weight of the cap sheet and surfacing. (Is this still done? If not, we should remove this information as it is extraneous.)

3 2. Definitions and Terminology

3.1 2.1 COMPOSITION

Bituminous and modified bituminous flexible membrane systems are composite sheet membranes which are thermoplastic in nature but display variable elastomeric properties when modified. These sheets generally consist of bitumen (oxidized or modified), reinforcement, and surfacing materials. The performance of these membranes may be compromised by subtle, seemingly inconsequential changes in composition.

The formulation of the bitumen is critical, particularly when its physical properties are modified by the addition of polymers. Bitumen is most commonly modified with styrene butadiene styrene (SBS) or atactic polypropylene (APP). The manufacturer must ensure that a suitable degree of compatibility exists between the bitumen and the polymer and that a thorough mix has been obtained. The careful selection and combination of bitumen and polymer (the type of modifier, the percentage of polymer used, etc.) determines the physical properties and long term performance of the modified bituminous “binder”. The binder provides the membrane with its waterproofing capability and may impart the following properties:

low temperature flexibility
elasticity
high temperature resistance to flow
resistance to aging

The bitumen utilized for oxidized bituminous membranes has been “blown”, similar to roofing asphalt (see Section Reference needed). This produces a higher softening point and, therefore, a more useful temperature range.

The physical properties of the binder are further enhanced by the imposition by saturation or coating onto a carrier or reinforcing mat, most commonly a textile such as:

non-woven spun-bonded polyester
woven polyester scrim
fibreglass mats
woven fibreglass cloth
combinations of the above

(Some polyester modified membrane manufacturers use oxidized bitumen to saturate the reinforcing, particularly when “heavyweight” reinforcing is used.). The type of reinforcing selected depends on the end use and desired physical properties of the finished products. The weight, quality, tension during manufacturer, and method of saturation and coating of the reinforcing are some of the factors governing the final product's performance.

Membranes are usually surface treated with a parting agent so they do not stick in the roll. Surfaces that will be hot asphalt applied are usually sanded while torch-applied surfaces use polyethylene or other thermofusible films. Exposed surfaces may be embedded with mineral granules (usually ceramic chips or slate flakes) or laminated with metal foil for ultra-violet protection. As an alternative on roofs with minimal slopes, a pour coat and gravel surfacing may be installed over some membranes, although this makes the quality of application difficult to inspect and may lead to problems with membrane slippage due to the weight of the cap sheet and surfacing.

The thickness of the membrane should be suited to the method of application. Torchable membranes must be thick enough to allow the underside to be melted without burning through to the reinforcing and thin enough to be manageable in winter conditions. Hot asphalt applied (mopped) membranes should be of sufficient thickness to perform adequately but should not act as a “heat sink”, lowering the temperature of the asphalt before a sufficient bond is achieved. Manufacturers often refer to membrane thickness in one of two ways. “Nominal Thickness” usually refers to the thickness including any granular finishes. As the granular surfaces do not contribute to the performance of the membrane (except as ultra violet protection and appearance), thickness measured “at the selvage edge” usually gives a more accurate indication of the physical properties of the membrane related to thickness.

3.2 2.2 PERFORMANCE

The physical properties of the membranes available today vary greatly. Each membrane manufacturer “tackles” the problems of roofing technology differently, based on individual design criteria. The design authority, in consultation with the manufacturers, must identify the properties most important for the performance of the roof system on an individual project basis.

As a precaution, RGC has accepted the following performance limitations, based on the lowest expected in-service temperatures of the membrane:

Temperatures warmer than -10°C (+14°F) require membranes with a minimum tensile strength of 150 N/50 mm.
Temperatures warmer than -18°C (0°F) up to -10°C (+14°F) require a base sheet or cap sheet with a minimum tensile strength of 294 N/50 mm (CGSB 37-GP-56M Grade 1).
Temperatures colder than -18°C (0°F) require a base sheet or cap sheet with a minimum tensile strength of 785 N/50 mm (CGSB 37-GP-56M Grade 2).

The design of a roof membrane system is contingent upon many factors and is not solely a function of design temperatures. Consult the membrane manufacturer for assistance with design considerations and membrane selection.

RIDGING & WRINKLING OF MODIFIED BITUMEN MEMBRANES == Reprint of CRCA Technical Bulletin, Volume 43, published October 1995:

Can roofs be “perfectly” constructed‌ Under most circumstances, the answer to that question would be ‘No’. Minor aesthetic imperfections, that have no bearing on performance, will always develop due to the materials used and the conditions under which they are installed.

Modified bitumen membranes, with their relatively thin protective surfacing (primarily ceramic granules or metal foils), can be particularly susceptible to the occurrence of these blemishes. Unlike traditional built-up roofs, these membranes are not “hidden from view” by a heavy top pour of asphalt and gravel. The reflective properties of their protective surfacing will allow many minor anomalies, such as deck or insulation unevenness, to readily telescope through to the roof surface. Over time, due to natural weathering and aging, these aesthetic imperfections will become increasingly visible. There are, however, distinct benefits to this aspect of modified bitumen membranes. Some manufacturing defects, such as poor surfacing embedment and uneven or insufficient backside coating, may be detected through an inspection of the rolls prior to installation. Serious errors in application will be apparent almost immediately allowing timely remedial action to take place.

The decision to repair a modified bitumen roof should, as with every type of roofing system, be made only after careful thought and should be based primarily on performance consequences. Open seams, fishmouths at laps, large unbonded areas of the membrane and areas where overheating has resulted in distortion to the reinforcing should be corrected as soon as possible. Trivial anomalies, on the other hand, such as minor wrinkling and ridging are to be expected as a function of the physical characteristics of these materials and their required application methods. Patching a minor blister or a small wrinkle because of visual impact alone is not justified and, in most cases, the repairs will look far worse than the blemish they were intended to correct.

As contractors have become more experienced with modified bitumen membrane installation, application techniques have evolved that have proven to reduce the occurrence and severity of these “blemishes”. These techniques, however, will not eliminate these minor anomalies entirely. In addition, it should be realized that they may significantly increase the cost of a roofing project due to added labour costs and lengthened construction schedules, with only marginal benefits for the owner and no meaningful increase in performance value.

Modified bitumen membranes have proven to provide satisfactory performance in most regions of our country. As with any product, however, they have their limitations. One should not forget that their primary purpose is to be a barrier to moisture. Although they are available in a variety of coloured surfaces and textures, their inherent physical properties make an absolute flawless appearance impossible under most circumstances. A reasonable level of expectation is required by those who specify these membranes together with a reasonable level of care and skill in their application.

4 3. RCABC (RoofStar) Guarantee Standards, Policies, Recommendations and Reference Materials for SBS Systems

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4.1 USING THE TEXT SELECTION BUTTONS

Section C contains materials that have been classified as Guarantee Standards, Policies, Recommendations or Reference (Information). Hide or reveal the classifications as desired, by clicking the buttons above. Guarantee Standards remain visible at all times, in black, and cannot be hidden.

4.2 3.1 MATERIALS

Materials to be covered by the Guarantee Program must be acceptable to RGC. A listing is published in the RCABC Roofing Practices Manual, Section (Reference needed).

All materials must be protected from weather by properly stacking above ground or roof surface and in factory packaging or other adequate covering until applied. All installed roofing materials that are susceptible to moisture damage must be made watertight by the end of each work day.

All roofing components must be supplied or accepted by the membrane manufacturer. See manufacturer component listings. (Sections reference here)

4.2.1 SUGGESTED REVISION:

Materials to be covered by the Guarantee Program must be acceptable to RGC. A listing is published in the RCABC Roofing Practices Manual, Section C.

Materials covered by the Guarantee Program

that are on site but uninstalled must be protected from weather by properly stacking above ground or roof surface and in factory packaging or other adequate covering until applied.
that are installed, but susceptible to moisture damage, must be made watertight by the end of each work day.
must be supplied or accepted by the membrane manufacturer.

4.3 3.2 GENERAL

4.3.1 3.2.1 Application

<jstdiv group="ref">As with all flexible membranes, the quality of the installation is critical to the performance of bituminous and modified bituminous membranes. Although some of the application techniques for these membranes can be similar to those employed in built-up roofing, and the materials can be “familiar”, the differences are critical.</jstdiv> <jstdiv group="rec">It is important that the specifications, details, and installation techniques all conform to the membrane manufacturer's requirements.</jstdiv>

<jstdiv group="ref">One of the major concerns when applying these membranes with hot asphalt is to ensure the asphalt remains hot enough to fuse with the binder of the membrane.</jstdiv> The asphalt temperature must conform to the membrane manufacturer's minimum application temperature and minimum +205°C (+400°F) as required by RGC Guarantee Standards. Asphalt should not be mopped more than 1 m (3') preceding the roll as it has been demonstrated that the temperature of mopped asphalt drops sharply once mopped out (see Section 3.9.1.2). <jstdiv group="rec">In addition to asphalt temperature, particular attention should be paid to slope limitations, fastening requirements, type of asphalt, the amount of asphalt used, and membrane flashing requirements when using hot asphalt.</jstdiv> <jstdiv group="ref">Some manufacturers may require “torched” membrane flashings to ensure a proper bond and prevent problems with slippage or asphalt running down the vertical and collecting at the cant. Slippage can also be a problem when an excessive amount of asphalt is used. Only enough asphalt to meet the adhesive requirements is needed. The mopping asphalt has a lower softening point than the bitumen in the membrane and may result in asphalt running and slippage problems.</jstdiv>

<jstdiv group="rec">The major concern when installing “torch-on” membranes is an obvious one: SAFETY. This is discussed in detail in Section 5.0.1 Safety Precautions - Torching. In addition to safety, it is essential that the membrane be fully and evenly bonded to the substrate. As the roll is installed, the roofer must ensure the full width of the roll is melted and the preceding roll's side lap is preheated. A small “wave” or “bead” of melted bitumen in front of the roll usually indicates sufficient heat. Special attention to seams is required.</jstdiv>

<jstdiv group="ref">The polyester fabric used as reinforcing in many thermofusible (“torch on”) membranes is subject to dimensional changes at high temperatures. Care must be exercised by the applicator not to over-torch or over-heat membranes. Membranes must be designed and manufactured specifically for torch applications.</jstdiv><jstdiv group="rec">It is recommended that the cap sheet installation immediately follow base sheet installation in all cases. However, when it may be necessary to delay the installation of the cap sheet due to weather, project scheduling or the like, then the following criteria must be considered:

ANY delay in the installation of a cap sheet will result in the requirement for a special inspection and thorough cleaning of the base sheet. The inspection is for mechanical damage from traffic or trades and cleaning is necessary to ensure good adhesion; this must be done to the satisfaction of the roofing contractor.
Sanded base sheets should have a thin squeegee glaze coat of asphalt applied immediately after application of base sheet if any delay for cap installation is anticipated.
Base sheets which are either sanded, glaze coated or thermofusible can be exposed for up to six months. It must be recognized that an exposed base sheet is vulnerable to mechanical damage and construction dirt. The base sheet should be well protected by carefully placed and maintained protection panels (plywood for example). This protection would be supplied, installed and removed by someone other than the roofing contractor.

Consult manufacturer(s) for specific construction details and specifications.</jstdiv>

4.3.1.1 3.2.1.1 APPLICATION CAUTION

4.3.1.1.1 MODIFIED BITUMEN MEMBRANES IN HOT MOPPED ASPHALT

The design authority should recognize that the appearance of wrinkling and ridging in modified bitumen cap sheets applied in hot asphalt may be generic to certain manufacturers of this system, and particularly when attempted in cooler temperatures. Although some manufacturers' literature suggests application may take place in temperatures as low as -25°C (-13°F), there are many subsequent limitations, the variables of which may result occasionally in severe wrinkling or ridging of the cap sheet as well as potentially poor adhesion.# RGC recommends that, in order to minimize the potential for wrinkling and ridging, the use of mopped cap sheets not be considered or specified when ambient temperatures (including wind chill) may go below +5°C (+41°F).
Many factors affect the behaviour of the finished prefabricated sheets including:
- The quality of the binder (waterproofing agent).
- The choice of carrier including suppliers of fibreglass, polyester, or a combination of the two.
- Saturation of the carrier.
- Engineering of the sheet (composition and placement of the components within the sheet).
- Quality control of the manufacturer.
- Expertise of the manufacturer's personnel (including field representation).
- Recommendations as to what is required for a completed system and the recommended application procedure.
- Installation in the field by a competent contractor.
- The designer's role in choosing the product(s) which satisfy each previous item described.
The wrinkles or ridges are usually considered an aesthetic problem only, but may occasionally result in fishmouthing and intermittent bonding of the cap sheet. Both of these deficiencies affect the performance of the membrane.
RGC recommends the use of torch applied thermofusible cap sheets in 2-ply modified bitumen systems in all cases, but particularly if roofing must be carried out in cool or cold weather. Appropriate safety precautions regarding torching must be addressed.
Occasionally some mopped systems, particularly with heavy cap sheets, have exhibited a propensity for membrane slippage, frequently on insulated systems where there is a combination of slope, heavy inter-ply mopping and lack of mechanical fastening (back nailing) of sheets. (See Section 2.1.3, C5.3 for mechanical fastening requirements and slope limitations).
It is also common for mopped systems to exhibit some asphalt bleed-out at the seams. Minimal or reasonable bleed-out is to be expected and is an aesthetic problem which may be minimized by the embedment of matching granules. Bleed-out which oxidizes and alligators with time does not normally affect the waterproofing efficiency of the roof.

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4.3.1.1.2 APP MODIFIED BITUMEN MEMBRANES

Cold Weather Application:
Designers and contractors should recognize that APP modified bitumen membranes can be extremely difficult to work with in colder temperatures, and that even attempting to unroll the material in very cold temperatures may result in cracking of the sheet or other problems.

Some manufacturers make different grades of material for application at different times of the year. Most manufacturers recommend an application temperature lower limit of approximately 5°C (40°F). DO NOT ATTEMPT to install APP modified bitumen membranes below these recommended temperatures.

4.3.2 3.2.2 Roof Slope

On all reroofs without positive slope to drain and all protected or modified protected membrane roofing, only non-organic felts or membranes may be used.

Positive slope to drain is an absolute requirement for organic felts. All new construction roofs must have positive slope to drain. Definition of roof slope is provided in Section (reference here). Where required, crickets and saddles should be provided to assist drainage.

<jstdiv group="policies">For single-ply roof systems, a minimum slope 1:15 (3/4" in 12")is required. Any roof areas less than 1:15 (3/4" in 12") require 2 ply membrane assemblies.</jstdiv>

<jstdiv group="rec">A minimum slope of 1:50 (l/4" in 12") is strongly recommended, and should provide positive slope to drain [required for a Five (5) or Ten (10) year RoofStar Guarantee for new construction and for organic felt membrane systems when re-reroofing]. Positive slope to drain is attained when no standing water remains on the deck within a reasonable amount of time after rainfall stops during days with conditions that permit evaporation.

Slope can be provided by sloping the deck, or using tapered insulation boards of insulating fill (insulating fill is rarely used in B.C.). A minimum slope of 1:50 (1/4” in 12”) is strongly recommended. The exception is often drain wells that are designed to collect water and provide a flat surface for the installation of roof drains. Therefore standing water may remain in drain wells for a longer period after a rainfall stops.

Crickets and saddles should be employed between drains where the design slope of the roof is less than 1:50 (1/4" in 12"), where the roof deck is uneven and ponding may occur, or simply to assist the movement of water to drains.

In re-roof applications, when utilizing 2 ply modified asphalt membranes, there is no requirement for slope to drain. However, slope is strongly recommended.</jstdiv>

4.3.2.1 SUGGESTED REVISION

All newly constructed roofs must have positive slope to drain.

<jstdiv group="rec">In re-roof applications, when utilizing 2 ply modified asphalt membranes, there is no requirement for slope to drain. However, a minimum slope of 1:50 (l/4" in 12") is strongly recommended for any low-slope roof, and should provide positive slope to drains.</jstdiv>

For single-ply roof systems, a minimum slope 1:15 (3/4" in 12") is required. Any roof areas sloped less than 1:15 (3/4" in 12") require 2 ply membrane assemblies.

<jstdiv group="ref">Positive slope in this Manual means a slope that drains water sufficiently so that no standing water remains on the deck within a reasonable amount of time after rainfall stops, during days with conditions that permit evaporation. A roof is said to have positive slope even if standing water remains in drain wells for a longer period after a rainfall stops; drain wells are designed to collect water and provide a flat surface for the installation of roof drains.

Slope can be provided by sloping the deck, or using tapered insulation boards of insulating fill (insulating fill is rarely used in B.C.).</jstdiv>

<jstdiv group="rec">Crickets and saddles should be employed between drains where the design slope of the roof is less than 1:50 (1/4" in 12"), where the roof deck is uneven and ponding may occur, or simply to assist the movement of water to drains.</jstdiv>

4.3.3 3.2.3 Re-Roofing

<jstdiv group="policies">Re-roofing over existing membrane is only permitted in specific circumstances and only when approved in writing by RGC and the membrane manufacturer.</jstdiv>

4.3.4 3.2.4 Tying Into Existing Roofing

Where a new roof is tied-in to an existing roof, the two areas must be isolated and separated by a curb joint properly attached to the structure and properly flashed. If job conditions do not allow for a curb joint, written permission from RGC to eliminate curb joints must be obtained and a positive water cut-off must be installed to the deck to isolate the existing roof from the new roof.

4.3.5 3.2.5 Wall Sheathing: Perimeter Requirements (EDITED for format and content)

<jstdiv group="policies">Regardless of the substrate to which roof membranes are applied, installation of roof membrane to the surface must be governed by the membrane manufacturer's requirements for that substrate.</jstdiv>

4.3.5.1 GYPSUM SUBSTRATES

Gypsum boards on vertical surfaces must be RGC Accepted overlay boards with water resistant properties.

<jstdiv group="ref">On steel framed walls, it is acceptable to use gypsum overlay boards accepted for the Guarantee Program, provided the gypsum board has a minimum thickness of 12mm (1/2") or fibre-mat reinforced cement boards with a minimum thickness of 9.5 mm (3/8") that conform to ASTM C1325-04.</jstdiv>

4.3.5.2 DECK SUPPORTED BY WALL

In combustible construction, or where permitted by the Building Code in non-combustible construction, all concrete or masonry parapets or walls which do not provide a smooth, clean, dry surface for membrane adhesion or are to be applied with oxidized asphalt as the adhesive must be sheathed with a minimum 15.9 mm (5/8") treated plywood, or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04 mechanically attached to the wall. The plywood is to extend either a minimum of 200 mm (8") above membrane surfacing, to the bottom of the reglet, or, if required by the type of membrane, to the full height of the parapet.

4.3.5.3 DECK NOT SUPPORTED BY WALL

Where permitted by the Building Code, all concrete or masonry parapets or walls to which roofing is to be applied must be sheathed with minimum 15.9 mm (5/8") plywood or 9.5 mm (3/8") reinforced cement board that conforms to ASTM C1325-04 solidly attached to the roof deck with adequately treated blocking. Compressible insulation is to be installed between the sheathing and the wall. Coping and / or counter flashing is to be installed. See construction details Sections 10.3.1 and 10.3.3. The plywood is to extend either a minimum of 200 mm (8") above membrane surfacing or, if required by the type of membrane, to the full height of the parapet or wall. This item is supplied and installed by others unless specified otherwise.

4.3.6 3.2.6 Other

Fully adhering modified bituminous membranes directly to wood decks is not permitted.

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4.4 3.3 ROOF DECKS

4.4.1 3.3.1 Concrete Decks (EDITED for format and content)

Concrete decks, curbs and equipment pads must be clean, dry, and smooth prior to commencement of roofing.
Poured concrete or lightweight concrete decks are not to be roofed for a minimum of 28 days after pouring unless expressly instructed in writing by the Project Structural Engineer.
All concrete decks to receive adhered asphaltic roofing shall be primed.
A vented base sheet is required under all asphalt-adhered (adhesive, mopped or torched) roofing membranes that are adhered directly to concrete decks unless insulation is installed directly above or over the membrane.

4.4.2 3.3.2 Wood Decks

All wood decks shall be properly fastened to B.C.Building Code requirements. With the exception of standard insulated roof systems, all knots or cracks shall be covered with metal prior to acceptance of deck surface.This work is to be done by others. <jstdiv group="policies">Non-veneer (O.S.B. or wafer board) panels are acceptable sheathing for decks with low-slope roofing applications, provided the roofing membrane is not fully adhered directly to the panels.</jstdiv> The minimum plywood or non-veneer (O.S.B or wafer board) deck thickness for low-slope roofing (i.e., membrane roofing) shall be a minimum 12.7 mm (1/2")and as indicated in the applicable Building Code.

An RGC approved separation sheet, minimum#40 asphalt coated fibre glass base sheet conforming to CAN/ CSA A123.16 - M88 (R1996), Type II or manufacturer’s accepted base sheet of equal or greater weight and reinforcement, or RGC accepted rigid insulation / overlay board mechanically attached or semi-adhered membrane (spot or strips) is required over non-veneer panels before fully adhered roofing membrane is applied.

<jstdiv group="policies">Direct torch (open flame) membrane applications to wood decks and wood surfaces is NOT permitted. For further development of this policy, refer to SBS Application & Safety: Best Practices.</jstdiv>

Differential edge movements or deflection in excess of1/360 of the span in plywood or non-veneer decks in low slope roofing must be prevented by:

solid blocking under non-supported edges, and /or
use of tongue-and-groove plywood with non-grooved edges supported by joists or solid blocking, and / or
when rigid insulation is over the deck, properly sized and installed H-clips must be used on the unsupported edges.

4.4.3 3.3.3 Separation Layers

Pre-cast panels, post-stressed beams, or “T” and cavity decks shall have a separation layer such as fibre board, gypsum board, plywood, proprietary overlay board etc. applied over the deck prior to the application of the roof membrane. Where a difference exists in the levels of adjacent surfaces, the general contractor or others shall install grouting. This grouting shall be feathered on the lower surface a minimum distance of twelve times the amount of the vertical differential.

4.4.4 3.3.4 Electrical Conduit

Conduit, EMT, cable and/or piping applied on the top of roof deck surfaces shall not be acceptable on new construction projects. <jstdiv group="policies">If conduit is present on decks in re-roofing projects, the deck must be made smooth and even to the satisfaction of the accepted roof inspection firm. The upper layer of insulation must cover the conduit, EMT, able and/or piping.</jstdiv>

4.5 3.4 VAPOUR RETARDERS

<jstdiv group="policies">The decision to use and the selection of, a vapour retarder is the responsibility of the design authority. Neither RGC nor the roofing contractor will accept any responsibility for damage to, or failure of, the roof system caused by the use or absence of a vapour retarder.</jstdiv>

4.6 3.5 INSULATION

4.6.1 3.5.1 General

Only RGC Accepted insulations, specifically listed by membrane manufacturers in the RPM as acceptable for use with their modified bituminous loose laid, or mechanically attached base sheets, may be used without an overlay board in the RGC Guarantee Program.

4.6.2 3.5.2 Layering

Multi Layering: All square edge flat format insulation boards greater than 67.5mm (2.7”) in thickness shall be installed in multiple layers. Multi layering of plastic foam insulation is required for all adhered, mechanically attached, and ballasted low slope roof assemblies. In addition, all slope format plastic foam insulation boards greater than 150mm (6”) in thickness shall be installed in multiple staggered layers or alternatively, be installed under two (2)offset/staggered layers of RGC accepted insulation overlay boards.

Insulation board joints are to be offset or staggered 300 mm (12") from adjacent layers and rows.

<jstdiv group="policies">A minus offset tolerance of 50 mm (2") maximum will be permitted to compensate for variance in manufactured tolerance of differing insulation board widths and lengths. The exception is sloped insulation boards that are generally installed soldiered fashion to adjacent rows; and the first layer of overlay board over heat sensitive insulation to facilitate joint taping.</jstdiv>

4.6.3 3.5.3 Nailing Strips

Required on Slopes exceeding 1:12 [1" in 12"]) Where the total insulation thickness on nailable decks exceeds 25 mm (1"), nailing strips shall be mandatory on all insulated exposed membrane roofs utilizing bitumen as an adhesive and / or waterproofing medium (BUR, single or multi-ply modified bitumen or oxidized asphalt sheet systems (mop or torch applied base sheets,non-conventional felts, etc.) and will be supplied and installed by the roofing contractor. These nailers should be nominal 89 mm (3- 1/2") wide and of a thickness equal to that of the primary insulation. Spacing of these nailers will not exceed four feet for horizontal application and two feet for vertical application.Fasteners for attachment of wood nailers shall be two minimum #12 non-corrosive exterior screws spaced a maximum of 400mm (16”) o/c. Attachment screws shall be embedded into support media a minimum of 37.7mm (1.5”) at all nailing strip fastening points. Nailers are to be covered by one layer of accepted overlay board.Fasteners used for attaching membranes to nailing strips(back nailing) shall be membrane manufacturer’s approved screws with plates or nails with a minimum 25 mm(1") head size. Spacing of fasteners or nails on nailing strips shall not exceed 300 mm (12") o/c for horizontal applications and 600 mm (24") o/c for vertical applications.Where deck nailing strips are required to secure roofing nailing or insulation nailing strips (e.g. in concrete decks), deck nailing strips shall be supplied and installed by others.

<jstdiv group="policies">Consult the membrane manufacturer's published data for slope limitations.</jstdiv>

<jstdiv group="ref">Nailing strips are not required for use on RGC accepted in seam mechanically-fastened bituminous or non-bituminous flexible membrane systems. Heat welded or self-adhered SBS modified bituminous systems may be used without nailing strips provided RGC accepted in seam fastener patterns are used throughout all base sheet seams (minimum 24" o/c) and head laps (minimum of 3 fasteners). All layers of insulation are recommended be additionally secured with polyurethane foam adhesive.</jstdiv>

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4.6.4 3.5.4 Mechanical Fastening

When conventionally adhered roof assemblies are installed, (adhered, hot asphalt mopped, torched, etc.), all insulation must be mechanically fastened to all nailable decks including steel, with exceptions as per (reference here). <jstdiv group="ref">The upper layer or overlay in a multiple-layer insulation application does not require mechanical fastening.</jstdiv> The exception is for slopes exceeding 1:12 (1" in 12") or steeper - in those cases, the upper layer must be fastened.

When using multiple layers of plastic foam insulation the layers shall be mechanically fastened, whenever possible, as if they are a single layer. Alternately, when the use of mechanical fasteners is not feasible, or multiple layered assemblies require mechanical fastening of the base layer only, or decks are constructed of non-nailable materials (concrete,) polyurethane foam adhesives may be utilized to adhere insulation layers to one another, to other insulations, or substrates. Only polyurethane foam adhesives that are specifically listed as acceptable by the insulation manufacturer may be used. Extruded polystyrene insulation must have planed faces (removal of smooth surface) when adhered with polyurethane foam adhesive.

<jstdiv group="ref">The roof area is divided into three areas (zones). The perimeter area is defined as 10% of the building width or 40% of the building height, whichever is less. In no case will perimeter area be less than 2.0 m (7'). The field area is defined as the remaining area after the perimeter is calculated. When the roof height is:• greater than 18 m (60’) and low-slope (slope is 2:12 or less) or• less than 18 m (60’) and pitched (slope is greater than 2:12), Perimeter fastening along the entire eave will be enhanced to corner requirements. The corner area is defined by the perimeter in both directions at the corners.</jstdiv> <jstdiv group="policies">In no case will the corner area be less than 2.0 m x 2.0 m (7’ x7’).</jstdiv>

<jstdiv group="ref">For corner enhancement of roofs in high wind locations (higher than 100 mph) or for roofs above 60’ refer to Section (reference here).

Mechanically attached insulated membrane systems may be fastened according to manufacturer’s tested specifications complying with CSA A123.21-10 or a FM 1-90 assembly wind rating and when accepted by RGC and conforming to A4.6. Factory Mutual adhered assemblies require the initial layer to be mechanically fastened over a steel deck.

The upper layer or overlay in a multiple-layer insulation application does not require mechanical fastening.</jstdiv>

If mechanical fastening to concrete decking is required proprietary concrete fasteners and plates must be used.

Minimum Screw and Plate FastenersMinimum Nail Fasteners

Minimum fasteners using Screws and Plastic or Steel Stress Plates: (see Section 3.8.5.2)

Insulation Board Size	Field	Perimeter	Corner
600 mm x 1200 mm (2'x4')	4	4	5
600 mm x 2400 mm (2'x8')	5	6	8
900 mm x 1200 mm (3'x4')	4	6	7
1200 mm x 1200 mm (4'x4')	5	6	8
1200 mm x 1800 mm (4'x6')	6	8	12
1200 mm x 2400 mm (4'x8')	8	12	15

Minimum fasteners using Accepted Nails (Wood Decks Only): (see Section 3.8.5.2)

Insulation Board Size	Field	Perimeter	Corner
600 mm x 1200 mm (2'x4')	5	5	6
600 mm x 2400 mm (2'x8')	8	10	12
900 mm x 1200 mm (3'x4')	6	8	10
1200 mm x 1200 mm (4'x4')	6	8	10
1200 mm x 1800 mm (4'x6')	8	10	14
1200 mm x 2400 mm (4'x8')	12	16	18

Acceptable nail types: Shank-and-head or head-plate nails with minimum 25 mm (1")nominal head size. Head-plate nails with solidly attached plate to ensure plate cannot slide down on shank.

<jstdiv group="ref">Cavity deck or T Deck may be defined as either nailable or non-nailable, depending on profile and deflection.</jstdiv>

Nailing is only permitted on wood decks and where insulation thickness does not exceed 50 mm (2"). Nails with a minimum 25 mm (1") head size or greater are required for insulation and overlay boards fastened to wood decks. Nails to be placed a maximum 600 mm (24") o/c in each direction and be of sufficient length to penetrate the underlying sheathing a minimum of 20 mm (3/4") or in the case of plywood, completely through the sheathing.

When insulation and or cover boards are installed under mechanically fastened membrane systems the membrane manufacturer’s tested and approved fastener layout patterns shall be followed. In addition, the minimum number of fasteners with plates for insulation and or cover boards, under mechanically fastened membranes, shall be six (6) fasteners for 1200mm x 2400mm (4ft. x 8ft,) board sizes and four (4) fasteners for all other smaller board sizes.

For all adhered asphaltic membranes, ie: hot asphalt, torch welded, or cold adhesive applied roof assemblies: Heat Sensitive Insulation: On all heat sensitive insulations (polystyrene; extruded and expanded), an overlay consisting of two layers of acceptable cover board is to be installed when using hot asphalt as an adhesive, or where the cover board is less than 1/2" in thickness on torch applied assemblies.

Two layer system: Fasten the first layer of cover board, offsetting the joints from those of the insulation. Tape the joints before applying the second layer, offsetting the joints from both layers below. Alternatively, all layers of cover board and insulation may be fastened as a group.

Single layer system: Flame protection under or over the cover board is required. Seal over all board joints and wall transitions with membrane manufacturer's approved self-adhered membrane tape. Alternatively, a full layer of minimum No. 25 asphalt coated fiberglass base sheet conforming to CAN/CSA-A123.16-04 (R2009), Type II or No. 30 non-perforated felt conforming to CSA A123.3-05 (R2010) may be used under the cover board.

Composite board insulations with factory applied base sheets that utilize self-adhering seams for flame protection, are mechanically attached over decks listed by the membrane manufacturer, and specifically accepted by RGC, may be installed as a single layer overlay board over heat sensitive insulations.

Minimum Fasteners for Overlay Boards are: 1200 mm x 2400 mm (4' x 8')

Using:	Field	Perimeter	Corner
Screws and Plastic or Steel Stress Plates	8	12	15
Accepted Nails (Wood Deck Only)	12	16	18
Fastener layout patterns and other board dimensions	(See Section 3.8.5.2)

Heat Insensitive Insulation Only In the case of heat insensitive insulations, one layer of acceptable overlay board is required. For hot asphalt applied roof assemblies the insulation is to be mechanically fastened before an acceptable overlay board is fully mopped to the insulation. Alternatively, manufacturers proprietary insulation adhesives may be used to adhere accepted overlay boards to insulations. When hot asphalt or adhesives are not used in a roof assembly accepted insulation and overlay board(s) may, as a group, be mechanically fastened directly to nailable decks including steel.

4.6.5 3.5.5 Application to Steel Decks

When installing insulation or thermal barriers to steel decks, all edges of the first layer of insulation or thermal barrier shall be fully or intermittently supported by the deck. Mechanical fasteners must penetrate steel decks a minimum of 20mm (3/4") and must be located in the top flutes only. The minimum thickness of insulation directly over fluted steel decks shall be a minimum of one-half the nominal flute width. Additionally, the minimum allowable thickness of expanded polystyrene or unfaced glass fibre insulation shall be 38 mm (1-1/2"), and the minimum thickness for extruded polystyrene, faced glass fibre, faced polyisocyanurate, etc. shall be 25 mm (1").(For loose laid ballasted systems, see Section reference needed

4.6.6 3.5.6 Adhering Insulation

When foam plastic insulation is adhered (with hot asphalt or compatible adhesive) in a roof assembly, the insulation board size shall be a maximum 1200 mm (4') in any direction.

Only RGC accepted overlay boards may be installed by the back mop and flop application method over heat sensitive foam plastic insulation boards. Heat insensitive insulation boards, (e.g. Polyisocyanurate) are not permitted to be installed with this method.

Asphalt or paraffin-impregnated coated fibreboard roof insulation, used as an insulation overlay board must be asphalt-coated on the top and bottom surface (minimum coated two-sides) when adhered (in a roof assembly) with hot asphalt or asphaltic based adhesive.

Proprietary adhesive applied insulation/overlay board membrane systems accepted and installed in the RoofStar Guarantee Program shall conform to the CSA A123.21-10 Standard test method for the dynamic wind uplift resistance of adhesive attached membrane roofing systems and/or the Factory Mutual I-90 Listing for adhesive attached assemblies.

The roof system must be as per the complete tested assembly and a calculation for the building wind load requirements using the Wind-RCI calculator or RoofNav as applicable be submitted with project documents.

<jstdiv group="ref">Refer to C5.c for notes on wind uplift resistance - fastener patterns and Factory Mutual requirements.</jstdiv>

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4.6.7 Polyisocyanurate Insulation

Only polyisocyanurate insulation with non-organic facers(e.g. fibreglass) are acceptable for use in the RGC guarantee program. In addition, manufacturers’ product identification labels are required for all Polyisocyanurate insulation packaging and the date of manufacture must be provided on all product labels.

4.7 3.6 INSULATION COVERBOARD

4.7.1 3.6.1 General

RGC accepted insulation overlay boards shall be installed over all plastic foam insulations (EPS, XEPS, Polyisocyanurate) on all adhered low slope roofing systems. When heat sensitive insulations (EPS,XEPS) are used with heat welded membrane seams an accepted overlay board must be installed. Fibreboard shall not be used with flame welded seams.

4.7.2 3.6.2 Layering

Insulation and overlay board joints are to be offset/staggered 300 mm (12") from adjacent layers and rows. The uppermost layer of [insulation or] overlay board directly below membranes shall have joints that are offset/staggered from adjacent layers and rows.

4.7.3 3.6.3 Mechanical Fastening

Possible Wording: Refer to C5.c in this Manual for RoofStar Guarantee requirements for the application of mechanical fasteners, as they pertain to both insulation and overlay board applications.

<jstdiv group="ref">The upper layer or overlay in a multiple-layer insulation application does not require mechanical fastening.</jstdiv>

4.7.4 3.6.4 Using Adhesives

For adhered asphaltic membranes overlay board is required over all insulations.

NOTE: Is the following excerpt relevant to the SBS Section?

Adhered Systems For all adhered asphaltic membranes, ie: hot asphalt, torch welded, or cold adhesive applied roof assemblies: Heat Sensitive Insulation: On all heat sensitive insulations (polystyrene, extruded, and expanded), an overlay consisting of two layers of acceptable cover board is to be used when using hot asphalt as an adhesive, or where the cover board is less than 1/2" in thickness on torch applied assemblies. Two layer system: Back mop and flop first layer of overlay board for hot asphalt adhered systems, or use manufacturers accepted proprietary adhesives per published directions, offsetting the joints from those of the insulation. Then tape joints and install second layer offsetting the joints from those of the insulation. Then tape joints and install second layer offsetting the joints from those of the layer below. Alternatively, the membrane manufacturer's proprietary insulation adhesives may be used to adhere accepted cover boards and insulations. Single layer system: Flame protection over the cover board is required. Install the insulation and cover board with the proprietary accepted adhesive. Seal over all cover board joints and wall transitions with the membrane manufacturer's proprietary self-adhered membrane tape.

Asphalt core overlay boards, [minimum thickness 4.5 mm (3/16") nominal] or insulation and insulation overlay boards specifically designed for torch applications, that are accepted by RGC, mechanically attached with nails with a minimum 25 mm (1") nominal head size placed a minimum of one nail per 0.093 m² (1 sq. ft.) or plates and screws placed a minimum of 0.186 m² (2 sq. ft.). Seal all board joints and wall transitions with membrane manufacturer’s approved self-adhered membrane or tapes.

4.7.5 3.6.5 Joint Taping

Acceptable materials for taping joints, of hot asphalt, and cold adhesive applied roof assemblies on overlay board, insulation, gypsum board, and primed plywood are minimum 150 mm (6") wide No.15 felt, 150 mm (6") wide Fibreglass roof tape, or 150 mm (6") wide sheathing (membrane breather-type to CAN / CGSB 51.32-M77). The only acceptable methods of hot asphalt installation are by back coating with asphalt, or laying with a back-coating machine expressly intended for the purpose.

For taping joints of asphalt core overlay boards, without poly film surfaces, manufacturers purpose made self-adhered modified bituminous tapes are acceptable for use with hot asphalt, torch welded and cold adhesive applied roof assemblies.

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4.8 3.7 MEMBRANES

4.8.1 3.7.1 General

While the roof is being applied, all membrane openings at eaves, walls, vents, etc. must be sealed to prevent moisture from entering roofing or between plies of stripping.

Cold Weather Membrane Applications In cold weather regions, membrane selection must conform to the membrane manufacturer’s recommendations for January in service design temperature.

Membrane Surfacing and Slope Limitations (Modified Bitumen Membranes): Only factory cap sheets are to be used on slopes exceeding 1:24 (1/2" in 12"). Manufacturers published instructions as to application methods, materials, and slope limitations are to be followed. On slopes less than 1:24 (1/2" in 12"), double pour, modified double pour or alternate modified double pour and gravel surfacing may be used (see Guarantee Standards reference needed).

<jstdiv group="ref">NOTE: Fully nailed base sheet and torched cap sheet is considered a single-ply for Guarantee purposes.</jstdiv>

Both the base sheet and cap sheet in 2-Ply modified bituminous systems must be of modified bitumen materials using the same polymer. For example, if the cap sheet is an SBS modified bitumen sheet, then the base sheet must be an SBS modified bitumen sheet. Oxidized asphalt sheets will be considered as underlay only and must not be counted as one of two plies.

Both the base sheet and cap sheet must be installed in a parallel direction (not at 90° to each other). Manufacturer's printed instructions for overlaps are to be followed.

For the application of 2-ply ungranulated membranes; both the cap sheet and base sheet are to be applied separately. Shingle fashion application (i.e., 50% lap) is not acceptable except where membrane back nailing is required.

All modified bitumen base stripping terminating on vertical surfaces must be mechanically fastened.

Single Ply Modified Bitumen Membrane Systems

• Membranes used for a single ply modified bituminous membrane system adhered or mechanically fastened shall be a minimum thickness of 3.5 mm on the selvage edge, with a minimum 150 g / meters squared polyester or equal strength polyester-fibreglass combination reinforcement. . • 2 Torch applied membrane applications require a deck separation sheet of a minimum No. 40 asphalt coated glass base sheet or torchable overlay board. Direct torch application to wood surfaces is not permitted. • At roof slope transitions locations where slopes of less than 1:15 (3/4" in 12") meet steeper slopes a two ply membrane assembly must be carried 900 mm (36") beyond the lower sloped roof transition point.

Membrane Lap Preparation for Modified Bitumen Roof Systems • Granules are to be embedded prior to forming laps on all torch applied modified bituminous cap sheets. • Membrane end lap corners must be cut on a bias (clipped or trimmed on an angle) prior to forming laps on all torch applied modified bituminous membrane roof systems.

4.8.2 3.7.2 Mechanically Attached

On all adhered flexible membrane roof slopes that exceed 1:24 (1/2" in 12"), the manufacturer's published instructions are to be followed regarding mechanical fastening and/or back nailing of sheets, and the size and direction of sheet application to the direction of roof slope.

All mechanically fastened flexible membrane systems installed under RoofStar guarantee shall conform to the CSA A123.21-10 Standard test method for the dynamic wind uplift resistance of mechanically attached membrane roofing systems and/or the Factory Mutual I-90 Listing for mechanically attached assemblies.

Mechanically Attached Base Sheet – Cover wood surfaces with a minimum No. 40 asphalt coated fibreglass base sheet conforming to CAN / CSA – A123.16 – M88 (R1996), Type II or manufacturers’ accepted base sheets of equal or greater weight and reinforcement. Attachment of base sheets shall be a minimum of one nail, with a minimum 25mm (1") nominal head size, per 0.093 m2 (1 sq. ft.), or one plate and screw per 0.186 m2 (2 sq. ft). Lap base sheet end laps minimum 150 mm (6"), mechanically fix laps at 100 mm (4") o/c and seal all corner details with membrane manufacturers’ approved self adhered SBS membrane or tape. Wood surfaces must be “dry mop” dry, no pooling or standing water permitted. Metal base flashing is required on all vertical surfaces, walls, curbs, etc., that are 200 mm (8") or greater in height above the finished roof surface, when the mechanically attached base sheet method is used.

4.8.3 3.7.3 Self-Adhesive

Base and cap sheets of all self-adhered and cold adhesive applied roof systems must be installed in the same work day, phased installation of base and cap sheet membranes is not permitted.

Both the base sheet and cap sheet membrane must be competed in the same work day on all modified bituminous self-adhered systems. Specifications and manufacturers written application instructions must be strictly followed. Phased installation of membranes is not permitted.

Self-adhesive membranes must only be installed when ambient temperature meets or exceeds the manufacturer’s printed product installation temperatures. All self-adhesive field membranes must be fully rolled with a manufacturer’s accepted roller that is a minimum 34.2 kg (75 lbs.) or greater and provides an evenly dispersed weight. All flashing (stripping) membrane must be hand rolled with a membrane manufacturer’s accepted roller.

4.8.4 3.7.4 Cold-applied (Adhered)

As stated earlier, Base and cap sheets of all self-adhered and cold adhesive applied roof systems must be installed in the same work day, phased installation of base and cap sheet membranes is not permitted.

Both the base sheet and cap sheet membrane must be completed in the same work day on all adhesive applied modified bituminous systems. Specifications and manufacturers’ written application instructions must be strictly followed. Phased installation of membranes is not permitted.

<jstdiv group="policies">RGC accepts self-adhered and cold adhesive applied membranes installed over wood surfaces to manufacturers’ product installation specifications.</jstdiv>

Self-adhered membranes must not be installed on contaminated wood surfaces. A minimum 9.5 mm (3/8") nominal thick plywood sheeting (overlay) must be installed over all contaminated wood surface (eg. asphalt) to receive self-adhered membranes.

4.8.5 3.7.5 Protected and Modified Protected Membranes

On all protected and modified protected membrane roofing projects, a filter mat of approved material is to be properly installed between gravel ballast and insulation. The filter mat is required under pre-cast pavers that are used as ballast or walkways.

Insulation, which is bonded or mopped directly to the roof membrane, is not acceptable.

Concrete Ballast, Poured-in-place concrete or concrete topping as ballast or traffic topping is not permitted in the roof guarantee programs (see section 2.1.5 Waterproofing Membrane Systems). Only ballast, which permits easy or reasonable access to the membrane, is acceptable.

<jstdiv group="ref">Examples [of acceptable ballast]: properly sized gravel, concrete pavers, concrete-topped insulation, etc.</jstdiv>

Gravel Ballast: Protected Membrane and Ballasted Membrane (EPDM, TPO, PVC, etc.) Shall be clean, washed, round or crushed stone, falling within the following gradations: 35 mm (1-1/2") - 100 % Passing 25 mm (1") 70 - 100 % Passing 20 mm (3/4") 5 - 20 % Passing 12.5 mm (1/2") 0 - 6 % Passing 5 mm (3/16") 0 - 2 % Passing Any variance to the above must be accepted by the owner or the owner's representative and be confirmed in writing.

Pedestals: Installation of proprietary (purpose-made) pedestals, with integral spacer ribs for uniform spacing of pavers, or an accepted drainage layer designed to provide vertical separation between pre-cast pavers and substrate or other underlying materials, is mandatory. The use of proprietary drainage boards or pea gravel with filter fabric to provide drainage for unit masonry products (bricks, stone, etc.), is required. <jstdiv group="ref">The choice of pedestal or drainage layer type is the responsibility of the design authority. Pedestals / drainage layers provide airflow for drying surfaces and assist in leveling. They should not impede the flow of water or air, and should uniformly distribute the dead load of pavers, and other unit masonry products, as well as predicted live loads.</jstdiv>

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4.9 3.8 ROOFTOP GARDENS,PLANTERS & WALKWAYS

4.9.1 3.8.1 General

SBS Modified Bituminous membranes used on Landscaped and Vegetated roofing systems shall consist of two plies and the top ply (cap) must be a minimum thickness of 3.7 mm on the selvage edge, with a minimum 180g / meters squared polyester or equal strength combination reinforcement. Thermoset and Thermo Plastic (EPDM, TPO, PVC) single ply membranes used for Landscaped and Vegetated roofing systems shall be fully adhered and a minimum thickness of 1.5mm (0.060").

Membrane Protection: Protection for roofing membranes is required during the installation and maintenance of landscaping, extensive and intensive vegetated (green) roofing installations. The minimum membrane protection must be installed by the roofing or waterproofing contractor and shall be 3 mm (1/8") asphalt core protection board or 25 mm (1") minimum extruded polystyrene insulation plus filter mat, root intrusion barrier, and drainage layer. Tightly butt all protection and insulation boards, overlap all filter mat seams and seal all laps of roof intrusion barriers to RGC Guarantee Standards and manufacturer’s installation instructions.

<jstdiv group="policies">Only RGC accepted SBS Modified Bituminous, Thermoset and Thermoplastic roofing membranes that are specifically accepted by the membrane manufacturer for use on Landscaped and Vegetated (green) roof systems qualify for coverage under the RGC Guarantee Program.

The Membrane Manufacturer and RGC must confirm acceptance of other alternative protection systems or components in writing. Damage to membranes and flashings that results from the use of plants with aggressive root structures, (Bamboo, Willow etc.) for landscaped and green (vegetated) roof systems, is specifically not covered under the RGC Guarantee Program or the responsibility of RGC. For additional information refer to the latest addition of the British Columbia Landscape Standard, Green Roof Section.</jstdiv>

4.9.2 3.8.2 Root Barriers & Drainage

Proprietary root intrusion barriers must be acceptable to the roof membrane manufacturer and appropriate for the vegetation system installed. Polyethylene or polypropylene sheeting used as a root barrier shall be a minimum thickness of .2mm (8mils). Root Barriers shall be sheets or boards installed in a continuous plane above the roof membrane, carried up the inside of soil retention perimeters (separation zones), and must be installed with sealed laps and seams as per manufacturer's instructions.

A drainage layer is required. Specialized proprietary drainage products must be acceptable to the membrane manufacturer.

Separation Zones that are free of growing medium and vegetation are required around all roof perimeters, up-stands, drains, penetrations, mechanical equipment, expansion joints, etc. Zones must be a minimum of 300 mm (12”) wide and constructed with curbs or other physical barriers that separate and facilitate drainage. Physical barriers must be placed above the membrane protection layers and must not be attached through or penetrate the roof membrane.

4.9.3 3.8.3 Planter Design & Waterproofing

<jstdiv group="rec">Non-structural planters placed over landscaped deck and roofing membranes, with an appropriate protection layer, are strongly recommended whenever practical.</jstdiv>

4.9.4 3.8.4 Flood Testing

<jstdiv group="policies">Flood Testing is not a recommended practice but is at the discretion of the design authority or owner on systems permitted by ASTM D5957. If flood testing is required, testing shall be conducted prior to installation of overlying insulation or overburdens and conducted as per ASTM D5957.</jstdiv>

4.9.5 3.8.5 Overburdens

<jstdiv group="policies">In the case of Extensive Green Roofs (roof top gardens) with soil thickness of 200 mm (8") or less, when the landscaping (soil and plants) is included as part of the roofing specification and / or contract, the costs for removal and replacement of soil to access the membrane, to investigate or repair leaks in the membrane, are included in the RGC Guarantee coverage. Extensive Green Roofs may be constructed with coarse aggregate or be specialized proprietary drainage panels, vegetation trays and/or mats designed to direct excess water to roof drains. However, the removal and replacement of plants, irrigation lines and or equipment, electrical lines, landscape and decorative features such as concrete pads, statues, planters, large rocks, etc., to investigate or repair leaks in the membrane, is not included, and is the responsibility of others, subsequently such access shall be provided and or paid for by others.

In the case of Intensive Green Roofs (roof top gardens), and Landscaped Roofs with soil thickness in excess of 200 mm (8"), where access to the roofing membrane may be difficult, the removal and replacement of soil and plants to access the membrane to investigate or repair leaks in the membrane is the responsibility of others, and such access shall be paid by others. In addition, the removal and replacement of plants, irrigation lines or equipment, electrical lines, landscape and decorative features such as concrete pads, statues, planters, large rocks, etc., to investigate or repair leaks in the membrane is also the responsibility of others, and such access shall be provided and or paid for by others.

Structural planters that incorporate pre-curb or start-up curbs for walls that are completely sealed with membrane and are a minimum of 100 mm (4") in height, as detailed in Section 5 & 9 Construction Drawings, qualify for RGC Guarantee coverage. Waterproofing liners in planters with structural walls, concrete curb or other materials, that do not incorporate pre-curbs shall be isolated and separated from the guaranteed roofing membrane and are specifically not accepted under the RGC guarantee.</jstdiv>

4.9.6 3.8.6 Walkways and Warning Zones

<jstdiv group="policies">When primary roof membranes of contrasting colour are used for warning zones, membrane end lap off sets and ply side lap directions must be maintained. Staggered membrane end lap offsets may be positioned below primary roof membranes that are used for warning zones.</jstdiv>

<jstdiv group="ref">A design authority or membrane manufacturer may specify a proprietary walkway protection system or warning zone membrane over the primary roof membrane. Walkway and warning zone materials are not part of the roofing membrane assembly but are typically accessory products that are placed over completed roof membranes. Subsequently the type and performance of any walkway or warning zone material is specifically excluded from coverage under the RGC guarantee, as is any detrimental effect the materials may have on the roof system.</jstdiv>

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4.10 3.9 PERIMETER FLASHINGS: MEMBRANES

4.10.1 3.9.1 General

Membrane flashing (stripping) details (with the exception of low parapets, cant strip edges and RGC accepted door sill details) must be designed to provide a minimum 200 mm (8") sealed height above the finished roof surfacing. Surfacing is defined as the top of the roofing assembly, be it membrane, ballast or growing medium (soil). All membrane flashing (stripping) terminating on a vertical surface must be mechanically fastened.

Curbed openings (HVAC, skylights, etc.) must be a minimum height of 200 mm (8") and have at least one ply of membrane flashing (stripping) carried to the inside edge of the curb, or up under the built-in counter-flashing of pre-manufactured metal curbs (i.e. roof scuttles or HVAC) (see Detail Reference here).

Parapet walls may be less than 200 mm (8") in height, but not less than 87.7 mm (3½") in height, refer to RGC Guarantee Standard A6.10.3 (see Details Section 10.3.2).

All cant edge and parapet wall details must have membrane flashing (stripping) that overlaps the exterior finish (i.e. wall cladding) by a minimum of 50 mm (2"). On high parapet walls, that are completely flashed with metal, where membrane flashing (stripping) is terminated part way up the wall the remainder of the parapet must be covered with a flashing underlay of a minimum 40 mils or 1 mm (.040") self-adhered modified bitumen membrane. No. 15 Felt is not acceptable (see Detail Section 10.3.1).

All membrane flashing (stripping) terminating at cladded (i.e. stucco, siding, etc.) walls must lap under the sheathing membrane and cladding by minimum of 75 mm (3").

All membrane flashing (stripping) terminating under a reglet must be sealed to the wall with a compatible mastic (see Detail Section 10.3.3). Where a parapet, cant or separation / expansion joint detail intersects with a higher wall; the membrane flashing (stripping) must be sealed by gussets (membrane saddles) that are formed to protect the inside and outside corners (see Detail Section 10.3.1).

<jstdiv group="policies">New construction projects must follow proper sequencing. Where roof flashings overlap work by others (i.e. siding, stucco, etc.), this work must be complete prior to the installation of metal flashing or wood blocking must be installed to facilitate the future installation of the exterior wall finish under the cap flashing. When lapping under work by others (siding, stucco, etc.), the membrane and metal roof flashings must be installed prior to any wall coverings. Any variance to proper detail sequencing must be approved by the design authority in writing (see Section 10.3.3).

A reverse lap application method for base sheet and base sheet flashing (stripping), at roof up stand transitions, is permitted when self-adhered base sheet flashing is used as flame protection for wood surfaces. Use of the reverse lap method must be an acceptable application method to the membrane manufacturer.

If no published instructions are available, specific instructions in writing from the manufacturer must be obtained and filed with RGC before project start-up.

The roof system must be as per the complete tested assembly and a calculation for the building wind load requirements using the Wind-RCI calculator or Roofnav www.roofnav.comas applicable be submitted with project documents.</jstdiv>

<jstdiv group="ref">There is no minimum height requirement for exterior walls, (e.g. eave drip and gravel stop flashing)</jstdiv>

4.10.2 3.9.2 Cant Strips

Wood: Cant strips are only required as recommended by the membrane manufacturer. The use of hemlock lumber for construction of cant strips and related blocking is not acceptable.

Fibre Cants: Only fibre cants manufactured from non-combustible materials i.e.: perlitic or fire-resistant fibreboard are acceptable for use on roof systems with torch applied membranes.

The self-adhered base sheet must extend a minimum of 150 mm (6") onto the roof surface. The heat welded field membrane must be turned up at the vertical surface a minimum of 100 mm (4") or a heat welded base sheet transition gusset extending 100 mm (4") onto the roof and upstand surfaces be installed.

Membrane gussets must be installed to all inside and outside corners.

Modified Bituminous Base Sheet pre-stripping ply required at all perimeters, upstands and penetrations. Cap sheet stripping is required and must extend 150 mm (6") horizontally and 200 mm (8") vertically from the base of all upstands. All stripping terminating on vertical surfaces must be mechanically fastened.

4.10.3 3.9.3 Expansion and Control Joints

Roof Separation Joints (Expansion and Control Joints, etc.) / Equipment Sleepers / Safety Anchor Piers (poured in place pads) that are completely sealed (enveloped) with membrane flashing (stripping) may be less than 200 mm (8") in height but must not be less than 100 mm (4") in height above the finished roof surface.

Manufacturer’s proprietary roof expansion joint systems are acceptable for use when the systems are located a minimum of 200mm (8") above the finished roof surface and are completely sheathed (covered) with sloped metal flashing.

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4.10.4 3.9.4 Door Openings

Door sill membrane flashing (stripping) may be less than 200 mm (8") in height but must not be less than 100 mm (4") above the primary roof membrane and must be installed to comply with the following conditions:

A metal water stop flashing, formed with pan folded, welded or soldered corners must be mechanically attached to inside of door sill framing or opening and be sealed with membrane flashing (stripping).
Membrane flashing, (stripping) or metal pan sill flashing must be installed at doorjamb framing or opening to a minimum height of 100 mm (4") above door sill framing or opening, prior to installation of doorjambs and door sills.
Membrane gussets must be installed at sill corners.
Metal pan sill flashings or RGC accepted reinforced liquid flashing systems must be installed wherever clearances preclude the use of membrane flashing (stripping) to seal door sill details.
Slopes must be provided to direct water away from door sill details. (Overhangs are recommended wherever practical).
Overflow drains in that area must be installed a minimum 25 mm (1") lower in height than adjacent door sills.

4.10.5 3.9.5 Built-in Membrane Gutters

<jstdiv group="policies">When a built in membrane gutter joins an RGC Guaranteed sloped roof; the gutter will be included by the Guarantee. Built-in membrane gutters that drain a roof not covered by an RGC Guarantee are not eligible for a Guarantee.</jstdiv>

4.11 3.10 PERIMETER FLASHINGS: METAL

4.11.1 3.10.1 General

All roof protrusion and penetration flashings, vents, curbs, sleepers, pipes cable, drains, etc. shall NOT be installed LESS than 200mm (8") from the base of walls, cants, eaves and other roof equipment, protrusion and penetration flashings.

Metal base flashing shall be kept approximately 25 mm (1") above gravel to prevent immersion in water with the exception of protected and modified protected roof systems. (Question: is this relevant to SBS roof systems Standards?).

<jstdiv group="policies">Gravel stop-type flashings may be used, provided manufacturer's printed instructions are followed (see Section reference, if required).</jstdiv><jstdiv group="ref">The exceptions are overflow drains and roof scuppers that are installed through walls. These items are to be located by others.

Sheet metal flashings are designed to divert water away from the membrane flashing termination, usually onto the roof. The metal flashing also protects the membrane from deterioration due to the elements and from mechanical damage. The metal flashing is not a waterproofing membrane, therefore the roofing membrane should be continuous under the metal (see details Section 10.3 and RGC Guarantee Standards for requirements).

Metal flashing is essential to complete most waterproofing and roofing applications and attention to detail is critical. Some basic rules to observe when designing or installing metal flashings are:

only “S-lock” or “standing seams” are permitted (see Section 10.2.1)
metal counter flashings always go on top of the completed roof membrane
limit metal flashing lengths to 3.04 m (10' )
extend base flashings down over membrane flashing at cants to minimum 25 mm (1") above roof membrane surface. (Not applicable to protected membrane roof assemblies.)

For further details, the Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) publishes a reliable reference for the proper design and installation of architectural sheet metal. The Architectural Sheet Metal Manual is available from:

Sheet Metal and Air Conditioning Contractors National Association, Inc. c/o British Columbia Sheet Metal Association 156 - 4664 Lougheed Hwy Burnaby, B.C. V5C 5T5 (604) 299-4641</jstdiv>

4.11.2 3.10.2 Material Standards

The following minimum gauges and / or weights of commonly used metals or alloys will be applied to all projects under the Guarantee Program. The length of metal flashing shall be limited to a maximum of 3.04 m (10').

GALVANIZED STEEL: 0.50 mm (0.0196", 26 gauge) galvanized steel sheet, conforming to ASTM A653 / A653M-06 CS Type B, Z275 (G90) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1500 mm (60").

ALUMINIUM – ZINC ALLOY COATED STEEL: 0.50 mm (0.0196", 26 gauge) aluminium-zinc alloy coated steel sheet, conforming to ASTM A792/A792M-06 CS Type B, AZM150 (AZ50) coating. Thickness tolerance as per ASTM A924/A924M-06 ±0.08 mm (0.003") for sheet widths not exceeding 1500 mm (60").

ALUMINIUM: 0.80 mm (0.032", 20 gauge) aluminium sheet, utility quality to CSA HA Series - 1975, plain or embossed finish. Maximum thickness tolerance variation ± 0.06 mm (0.0025") based on 1200 mm (48") wide sheet.

STAINLESS STEEL: 0.38 mm (0.014", 28 gauge) stainless steel, Type 302, 304, 316, 2B finish to ASTM A167-82. Maximum thickness tolerance variation ± 0.04 mm (0.0015") based on 1200 mm (48") wide sheet. COPPER: 0.56 mm (0.022", 16 oz.) copper sheet, cold rolled roofing copper to ASTM B370-81. Maximum thickness tolerance variation ± 0.09 mm (0.0035") based on 1200 mm (48") wide sheet.

ZINC: 0.80 mm (0.031") zinc Sheet conforming to European standard EN 988-1996. Maximum thickness tolerance variation ± 0.03 mm (0.0012").

<jstdiv group="rec">Specifying authorities should indicate the type and gauge of metal required, as well as the qualifying standards. The reference standard for gauges is USS REV (metric in mm).</jstdiv>

4.11.3 3.10.3 Attachment

The use of concealed in-seam fasteners is required. Any fastening of metal flashings on the top of parapet surfaces is strongly discouraged and is not permitted as the only attachment method.

If top-surface fastening must be used because of a specific job site condition, only appropriate screw-type fasteners with neoprene washers may be used. Nails are not acceptable. The outside and inside face of metal cap flashing must be attached with cladding fasteners (screws), and/or concealed clips. Continuous and discontinuous concealed clips and or cladding screw fasteners or a combination of these attachment methods are acceptable to secure metal cap flashing. No fastening of flashing is permitted within 87.7 mm (3-1/2") of the roof surface. Note: Cladding fasteners or concealed clips are not required on the inside face of roof edge cant strip details.

Cladding fasteners (screws) with gasketed washers, used as exposed fasteners for metal flashing, must be No. 8 or better, made of metal compatible with and corresponding in colour to, the flashing material being installed. Nails are not acceptable as exposed fasteners. The minimum number of cladding screws used to face fasten metal cap flashing shall be three (3) fasteners equally spaced (±10%) between seams of flashing formed from 3000 mm (10 ft.) metal stock and a minimum of two fasteners equally spaced (±10%) between flashing seams formed from 2400 mm (8 ft.) metal stock. Concealed clips, both continuous and discontinuous, shall be formed from the same metal type as the flashing being secured and be minimum 24 gauge in thickness. In addition, concealed clips are to be fastened as close to the bottom edge (hook) as practical but must not be fastened further than a maximum of 75 mm (3") from the bottom edge (hook). Concealed clips must engage drip or safety edges by a minimum of 12.7 mm (1/2").

Continuous Concealed Clips are to be attached with appropriate corrosive resistant fasteners spaced at a maximum of 300 mm (12") o/c. Discontinuous Concealed Clips shall consist of a single clip centred between the seams of each length of metal flashing. Clips shall be a minimum of 1000 mm (40") in length for flashing formed from 3000 mm (10 ft.) metal stock and a minimum 800 mm (32") in length for 2400 mm (8 ft.) metal stock. Discontinuous clips for shorter flashing lengths shall be approximately 1/3 the length of the metal flashing but not less than 100 mm (4") in length. Corrosive resistant fasteners for clips, to be spaced a maximum of 300 mm (12") o/c.

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4.11.4 3.10.4 Curb Heights (Roof Openings)

On all roofing assemblies (protected, modified protected or conventional), the minimum curb height (equipment curbs, vent curbs, etc.) shall be 200 mm (8") above the roof surfacing. Surfacing is defined as the top of the roofing assembly, be it membrane or ballast.

4.11.5 3.10.5 Seams

Standing seams and S-lock seams are both acceptable.

Seaming of inside corners shall be carried to the base of the cant or the base of the metal. S-locks shall be fastened before the insertion of successive flashings. .2 Lap seams are acceptable only where the vertical run on the inside corner is less than 100 mm (4").

When the vertical height exceeds 300 mm (12"), standard seaming practices will be followed. When cants are not used on curbs standard seaming practices (standing seams) shall be followed, with the exception of the vertical flashing portion that is lapped to fit under counter flashing or equipment flanges.

<jstdiv group="policies">For roof curb-flashing seams ( e.g. equipment, skylights, etc.), which do not exceed 300 mm (12") in height, lap-type seams may be used on the vertical portion provided standing seams are used in the cant area.</jstdiv>

The design authority shall choose and specify the seaming system.

4.11.6 3.10.6 Cap Flashings, Base Flashings and Reglets

The top surface of walls (parapets, expansion joints, firewalls, roof dividers, etc.) wider than 100 mm (4" nominal) shall be constructed to provide positive slope to drain and be covered with metal cap flashing. Provide a reglet for all flashings terminating in concrete or masonry walls. When wall flashing terminates in a reglet, typically on high parapet walls, a coping flashing is required at the top of the parapet wall (See Metal Flashing Details; Section Reference needed). On new construction projects reglet and sloped wood blocking at top surface of concrete or masonry walls are to be installed by others (see Section 10.3.3).

<jstdiv group="policies">On flexible membrane conventional roofing systems, when metal wall or curb base flashings are not specified, RGC and manufacturer's approved wall or curb stripping membranes are acceptable when used with a secondary metal counter flashing placed a maximum of 250 mm (10") above the surface of the roof assembly. Stucco stops are not considered secondary metal counter flashings (see Section 10.3.3).</jstdiv>

Metal base flashings are required on all walls and curbs on roof systems that utilize gravel ballast filter mats. Metal base flashings on protected and modified protected membrane roofs must “kick out” minimum 50 mm (2") over insulation and filter fabric. (See note Section 10.1.1).

Neither No. 90 mineral roofing nor asphalt strip-type shingles are acceptable as parapet flashing in lieu of sheet metal flashing. Reglet must be 200 mm (8") minimum to 300 mm (12") maximum above the roof surface in conventional and protected membrane roofs. Roof surface is defined as the top of the roofing assembly, be it membrane or ballast.

In the case of multi-wythe masonry, composite walls, or parapets, and where not restricted by seismic codes, continuous flexible thru-wall flashings must be supplied and installed (by others), at the next course above the reglet or, alternatively, the inside of the parapet wall must be completely flashed or cladded.

Metal base flashing is required on all vertical surfaces, walls, curbs, etc. when hot asphalt is used to adhere stripping (flashing) membranes.

<jstdiv group="policies">Gum edge or gum lip flashings should be avoided in all circumstances. If job conditions allow for no other alternative, written permission from RGC for use of gum edge flashing must be obtained (also called surface reglet) (see Section Reference needed).</jstdiv>

4.11.7 3.10.7 Flashing on Stucco Walls

On stucco-faced walls, only 2-piece flashings are permitted. The upper piece, retaining the stucco, must have a vertical flange to extend behind stucco and building paper. Stucco stops are not considered metal counter flashings (see Section Reference needed).

4.12 3.11 ROOF PENETRATIONS and DRAINS

4.12.1 3.11.1 General

Flanges - All roof flanges in contact with asphaltic membranes of any type shall be primed both sides with membrane manufacturers approved primer and embedded in a trowel coating of compatible mastic. Flanges are to be a minimum of 100 mm (4") wide.

Lead flanges in contact with asphaltic membranes of any type shall be embedded in a trowel coating of compatible plastic cement. Priming is not required.

All vent plumbing flashings shall be constructed of non-ferrous material.

4.12.2 3.11.2 Gum Pans (Pitch Pockets)

With the exception of one on-site formed double standing seam corner joint and adjoining lapped flange joint, all flange corners shall be closed and soldered. <jstdiv group="policies">Use only membrane manufacturer’s approved proprietary urethane based structural sealants to fill gum pans or pitch pockets.

Install a back-up storm collar whenever practical (see detail Section 10.3. - new reference needed).</jstdiv> <jstdiv group="rec">This detail should be avoided; only use gum pans or pitch pockets as a last resort when other methods are impractical.</jstdiv>

<jstbutton group="Guarantee Standards">Guarantee Standards</jstbutton><jstbutton group="policies">Policies</jstbutton> <jstbutton group="rec">Recommendations</jstbutton> <jstbutton group="ref">Reference</jstbutton>

4.12.3 3.11.3 Strip-in Flashings

Strip-in Flashings (with membrane material) must be a minimum height of 200 mm (8") above finished roof surfaces. This includes strip-in type flashings for cables and multiple roof penetrations including grouped pipes and or cables must be purpose made roof flashings.

Strip-in vents will not be permitted for use in protected or modified protected membrane roofs. Curb mounting for all venting units and equipment except lead or aluminium jacks is mandatory.

Curbs are to be a minimum 200 mm (8") in height above top of finished surfacing.

<jstdiv group="policies">Strip-in type roof penetration flashings (lead, aluminium, stainless steel, copper, etc.) must be properly sized to fit pipe penetrations or alternatively, when pipes are irregular in size, spray foam urethane insulation may be used to fill gaps between pipes and flashings. Strip-in type roof penetration flashings are only permitted for use with single pipe roof penetrations, must incorporate properly fitted settlement caps,

Pipes that are higher than standard flashings must have site formed non-bituminous flexible roof membrane storm collars sealed with compatible sealants and stainless steel clamps.

All-purpose made multiple penetration flashings must provide a positive weather seal by use of manufacturer’s proprietary rubber based friction seals, mechanical clamps or gooseneck type design, and be a minimum height of 200 mm (8") above finished roof surfaces

Strip-in type vents are permitted up to 350 mm x 350 mm (14" x 14"), equal to approximately 0.12 meter squared (196 sq. in.) on exposed or conventionally-placed membrane roofs provided the vents are not located in or near a valley and are well drained.</jstdiv>

<jstdiv group="ref">Alternatively, roof curbs with metal hoods may be used to seal cables and multiple roof penetrations. (Refer to tab 10.3.5)

Curbs are to be supplied and installed by others.

Metal wall base flashing is optional with these application methods.</jstdiv>

Alternate presentation of same information

4.12.3.1 3.11.3.1 STRIP-IN FLASHINGS (lead, aluminium, stainless steel, copper, etc., flashed in with membrane material)

must be a minimum height of 200 mm (8") above finished roof surfaces.
include strip-in type flashings for cables and multiple roof penetrations including grouped pipes and or cables must be purpose made roof flashings.
must be properly sized to fit pipe penetrations (Alternatively, when pipes are irregular in size, spray foam urethane insulation may be used to fill gaps between pipes and flashings.)
are permitted only for use with single pipe roof penetrations and must incorporate properly fitted settlement caps.

4.12.3.2 3.11.3.2 STRIP-IN TYPE VENTS

are permitted up to 350 mm x 350 mm (14" x 14"), equal to approximately 0.12 meter squared (196 sq. in.) on exposed or conventionally-placed membrane roofs, provided the vents are not located in or near a valley and are well drained.
will not be permitted for use in protected or modified protected membrane roofs. Curb mounting for all venting units and equipment except lead or aluminium jacks is mandatory on protected or modified protected membrane roofs.

4.12.3.3 3.11.3.3 STRIP-IN CURBS

are to be a minimum 200 mm (8") in height above top of finished surfacing.
are to be supplied and installed by others.

All-purpose made multiple penetration flashings must provide a positive weather seal by use of manufacturer’s proprietary rubber based friction seals, mechanical clamps or gooseneck type design, and be a minimum height of 200 mm (8") above finished roof surfaces.

Metal wall base flashing is optional with these application methods.

4.12.4 3.11.4 Roof Drains and Scuppers

Overflow scuppers shall be installed according to the British Columbia Building Code (BCBC).

Overflow scuppers are required when low doorway or window details are used, see standard A5.6.3

<jstdiv group="policies">When cast-iron roof drains are used; a sump receiver and under-deck clamp must be provided and installed by the trade supplying the roof drain. In addition, the trade supplying roof drains must also provide secondary stainless steel debris strainers in addition to primary drain strainers on all roofing systems that utilize gravel ballast and or growing mediums (soil). Only the use of drain manufacturer’s proprietary secondary stainless steel debris strainers is acceptable.

All flange type roof drains shall be constructed of non-ferrous material. Flanged copper drains shall be formed from a minimum weight of 16 oz. sheet copper for external (on outside of walls) drains and 24 oz. sheet copper for internal (inside walls or buildings) drains. The minimum gauge for aluminium sheet to be used for roof drains shall be 20 gauge for external use and 12 gauge for internal use. In addition, the trade supplying roof drains must also provide secondary stainless steel debris strainers in addition to primary drain strainers on all roofing systems that utilize gravel ballast and or growing mediums (soil). Only the use of drain manufacturer’s proprietary secondary stainless steel debris strainers is acceptable. All roof scuppers shall be formed with a minimum 37.7 mm (1.5") lower outside faces than side walls of the water collection boxes and incorporate minimum 12.7 mm (.5") drip edges on the lowered outside faces.

On all re-roofing projects all drains connected to internal piping shall be connected by mechanical compression type seals only. “O”- rings, mastics and caulking are not acceptable methods to seal roof drains to internal piping.

Where no overflow scuppers are specified, the structure must be designed to carry the total load of water collected in the event of the failure of roof drains (See BCBC latest edition). RGC recommends overflow scuppers be installed where perimeter walls exceed 100 mm (4") in height and accepts no responsibility for roof failure where scuppers are not specified or installed.

Roof drains and other roof accessories are to be installed as per membrane manufacturer's instructions.</jstdiv>

4.13 3.12 OTHER DETAILS

To be developed

5 4. SBS Roof Systems: Accepted Materials

ACCEPTED PRODUCTS AND SYSTEMS FOR ROOFSTAR FIVE (5) YEAR, ROOFSTAR TEN (10) YEAR, AND ROOFSTAR FIVE (5) YEAR WATERPROOFING GUARANTEES.

This list of acceptable materials is not intended for use as a comparison of material performance or quality. It is the sole responsiblity of the design authority to assess the performance capability and material suitability for specific design requirements.

The materials listed are those which have been accepted by the RCABC Guarantee Corp. (RGC) upon application by the manufacturer/supplier, in compliance with RGC Policy A-041, and are materials for which RoofStar Guarantee Certificates are available. The acceptance of these materials in no way reflects on the quality or performance of other materials not listed.

The materials and guideline specifications are listed under the name of the manufacturer and/or supplier of the primary membrane material; except that RGC has issued the guidelines on traditional built-up roofing systems (BUR) incorporating organic and glass felt primary membranes.

The numbers to the left of the index items refer to Sections of the RPM.

5.1 4.1 Vapour Retarders

The RCABC does not specify Vapour Retarders, as they are not included in the Guarantee Program. See manufacturer specifications where Vapour Retarders are required, and refer to proprietary products and installation instructions. This cross-reference is listed for information only.

5.2 4.2 Deck Overlay Boards

Manufacturers and ProductsGeorgia Pacific Canada Ltd.SecurerockSoprema Inc.Manufacturer name here

Click on any one of the tabs to the right to find products by manufacturer

Georgia-Pacific Canada Ltd. - Section Link

DensDeck Roofguard: Water-Resistant Gypsum Board

DensDeck Prime Roof: Guard - Water Resistant Gypsum Board

Securerock - Section Link

Gypsum: Fibre Roof Board

Glass: Mat Roof Board

Soprema Inc. - Section Link

Soprabase FR: Fire Resistant Wood Fibreboard with a Factory applied Base Sheet

Xpress Board: Non-Combustible Mineral Wool Insulation with Factory Applied Base Sheet

Soprasmart ISO HD 180: HD polyisocyanurate board with a heat fused membrane

Click on any one of the tabs to the right to find products by manufacturer

5.3 4.3 Insulation

This section includes tapered insulation, found in each product type/manufacturer shown below.

5.3.1 4.3.1 Composite Board Insulation

Manufacturers and ProductsInformation: Composite Board InsulationPosi-Slope WesternSoprema Inc.

Click on any one of the tabs to the right to find products by manufacturer

Composite board roof insulation products consist of an insulation bonded with another insulation and / or a variety of other products (typically fibreboard, perlite, membranes, etc.) to form a unified, multi-layered insulation board. The top and bottom surfaces of the board may be impregnated and / or coated with asphalt (or other binders), and covered with facing materials such as roofing felts, foils, kraft paper modified bituminous membranes, etc.

The properties and performance of composite board roof insulation varies with the components of the board. Generally, the boards are manufactured to provide some of the following properties and advantages:

Compatible with asphalt,
Resistant to thermal conductivity,
Resistant to fire,
Resistant to the effects of moisture,
Resistant to cell deterioration (durable),
Resistant to impact, and / or
Unaffected by asphalt application temperatures (no overlay may be required).

The possible disadvantages and precautions involved in the use of composite board insulations include:

Complexity of manufacture and dissimilar materials,
Sometimes expensive, and
Limited availability

Posi-Slope Western

MF - Protect Board Composite - Non-combustible mineral

Soprema Inc.

Xpress Board - Non-Combustible Mineral Wool Insulation with Factory Applied Base Sheet

5.3.2 4.3.2 Extruded Expanded Polystyrene Foam (XPS)

Manufacturers and ProductsInformation: XPS InsulationDow Chemical Canada Inc.Owens Corning CanadaTech-Crete Processors Ltd.

Click on any one of the tabs to the right to find products by manufacturer

(See also Expanded Polystyrene Foam and Protected Membrane Roof Assemblies)

Molten polystyrene and a blowing agent HCFC (142B) are mixed, under pressure, in an extruder. As this solution is extruded through an orifice into ambient temperature and controlled conditions, the blowing agent vapourizes causing the polystyrene to expand approximately 30 times its original size. The continuous extrusion process produces boards with a surface “skin” and closed cell structure and, for this reason, has been used extensively for protected membrane roof assemblies. The rigid insulation boards are expanded to a specific thickness during manufacture and have an approximate density of 32 kg / cu. m (2 lb / cu.ft).

Extruded expanded polystyrene foam roof insulation is combustible and, when used on steel decks or over a roof that is subject to fire exposure from below, a fire-rated underlayment or thermal barrier (such as gypsum board) may be required between the roof deck and the insulation (consult Building Code and insurance requirements).

Extruded expanded polystyrene roof insulation is manufactured to CAN / ULC-S701 standard and is currently available in three types (depending on physical properties) and in four forms, as follows:

Type 4 for use on conventional or protected membrane roofing systems
Type 4 with a factory-applied latex-modified concrete topping for protected membrane roofing systems
Type 3 for use on conventional roof systems
Type 2 for use on conventional roofing systems [density of 24 kg / cu.m (1.5 lb / cu.ft)]

Extruded polystyrene roof insulation provides the following properties and advantages:

Compatible with asphalt
Resistant to the effects of moisture
Resistant to cell deterioration (durable)
Resistant to impact
Resistant to thermal conductivity
Stable K-value

The possible disadvantages or precautions involved in the use of extruded polystyrene roof insulation include:

Flammable (combustible)
Affected by solvents (i.e. adhesives and cleaners used for single ply membranes)
Heat sensitive [requires an insulation overlay, such as fibreboard, to prevent “melting” (burnouts) from hot asphalt]
Will not retain nails (requires screws and plates)
Dimensional instability may result from improper curing at the factory

Dow Chemical Canada Inc.

Manufacturer: DOW CHEMICAL CANADA INC.

Contact Address: See Membership List Section 1

Product Group: EXTRUDED, EXPANDED POLYSTYRENE INSULATION

Country of Origin: United States

Country of Manufacture: Canada, United States, locations worldwide

DESCRIPTION

The roofing assembly / material information published in the RGC Roofing Practices Manual does NOT represent a complete set of the manufacturer's published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.

DECKMATE* (Type 2)

DECKMATE insulation is specifically designed to provide high quality, economical insulation for all conventional roofs, with single-ply, 2-ply or 4-ply roof membranes.

DECKMATE roof insulation is an extruded, expanded Type 2 CAN / ULC-S701-97 / CAN / CGSB-51.20-M87 polystyrene foam. It has excellent insulating characteristics (RSI 0.87 per 25 mm (R 5.0 per inch) of thickness), good compressive strength (110 kPa or 16 psi), and low water absorption (less than 1%).

DECKMATE has a smooth, high-density skin, and a closed-cell foam structure with shiplap edges on four sides. It is uniform in thickness and consistency and is easy to cut and handle. When installing, DECKMATE can be either loosely applied or attached to the substrate with mechanical fasteners, hot asphalt or adhesive. Board size is 600 mm x 2400 mm (2' x 8'), in thickness ranging from 25 mm to 100 mm (1" to 4").

DECKMATE* PLUS (Type 3)

DECKMATE* PLUS insulation is specifically designed to provide high quality, economical insulation for conventional roofs, with single-ply, two-ply or four-ply roof membranes.

DECKMATE* PLUS roof insulation is an extruded, expanded, Type 3 CAN / ULC S701 polystyrene foam. It has excellent insulating characteristics (RSI-.087 per 25 mm [R 5.0 per inch] of thickness), good compressive strength (140 kPa or 20 psi) and low water absorption (less than 1%).

DECKMATE* PLUS has a smooth, high-density skin, and a closed cell structure, with ship-lapped edges on four sides. It is uniform in thickness and consistency, and is easy to cut and handle. When installing, DECKMATE * PLUS can be either loose applied or attached to the substrate with mechanical fasteners, hot asphalt or adhesive. Board size is 600 mm x 2400 mm (2' x 8'), in thickness ranging from 25 mm - 100 mm (1" - 4").

ROOFMATE* (Type 4)

ROOFMATE insulation is an extruded, expanded, foamed Type 4 CAN / ULC-S701-97 / CAN / CGSB-51.20-M87 polystyrene rigid board designed specifically for roof applications. It is suitable for use in both protected membrane and conventional roof assemblies.

The extruded board has smooth, high-density skins, shiplap edges on four sides and a very dense closed-cell foam structure. Board size is 600 mm x 2400 mm (2' x 8'), in thickness ranging from 25 mm to 100 mm (1" to 4"). ROOFMATE has one of the highest thermal resistance values, an aged (RSI value of 0.87 per 25 mm (R 5.0 per inch). It has excellent water resistance characteristics (absorption of less than 1%) and a high compressive strength of 240 kPa (35 psi).

ROOFMATE is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

Owens Corning Canada

Manufacturer: OWENS CORNING CANADA INC.

Contact Address: See Membership List Section 1

Product Group: EXTRUDED, EXPANDED POLYSTYRENE INSULATION

Country of Origin: United States

Country of Manufacture: Canada, United States, locations worldwide

DESCRIPTION

The roofing assembly / material information published in the RGC Roofing Practices Manual does NOT represent a complete set of the manufacturer's published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.

FOAMULAR® C200 (Type 3)

FOAMULAR® C200® insulation is specifically designed to provide high quality, economical insulation for conventional roofs, with single-ply, two-ply or four-ply roof membranes.

FOAMULAR® C200® insulation is an extruded, Type 3 CAN / ULC S701 polystyrene foam. It has excellent insulating characteristics (RSI-.088 per 25 mm [R 5.0 per inch] of thickness), compressive strength (140 kPa or 20 psi) and low water absorption (less than 0.7%).

FOAMULAR® C200® has a smooth, high-density skin, and a closed cell structure, with ship-lapped or square edges on four sides. It is uniform in thickness and consistency, and is easy to cut and handle. When installing, FOAMULAR® C200® can be either loose applied or attached to the substrate with mechanical fasteners, hot asphalt or adhesive. Board size is 600 mm x 2400 mm (2' x 8'), in thickness ranging from 25 mm - 100 mm (1" - 4").

FOAMULAR® F350 (Type 4)

FOAMULAR® F350 insulation is an extruded, Type 4 CAN/ULC-S701/CAN/CGSB-51.20-M87 polystyrene rigid board designed specifically for roof applications. It is suitable for use in both protected membrane and conventional roof assemblies

The extruded board has smooth, high-density skins, shiplap edges on four sides and a very dense closed-cell foam structure. Board size is 600 mm x 1200 mm (2' x 4'), in thickness ranging from 25 mm to 100 mm (1" to 4"). FOAMULAR® F350 has one of the highest thermal resistance values, an aged (RSI value of 0.88 per 25 mm (R 5.0 per inch). It has excellent water resistance characteristics (absorption of less than 0.7%) and a high compressive strength of 240 kPa (35 psi).

FOAMULAR® F350 is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

FOAMULAR® F350 CVI (Type 4)

FOAMULAR® F350 CVI insulation is an extruded, Type 4 CAN/ULC-S701/CAN/CGSB-51.20-M87 polystyrene rigid board designed specifically for roof applications. It is suitable for use in both protected membrane and conventional roof assemblies.

The extruded board has smooth, high-density skins, shiplap edges on four sides and a very dense closed-cell foam structure. Board size is 600 mm x 1200 mm (2' x 4'), in thickness ranging from 25 mm to 100 mm (1" to 4"). FOAMULAR® F350 CVI has one of the highest thermal resistance values, an aged (RSI value of 0.88 per 25mm (R 5.0 per inch). It has excellent water resistance characteristics (absorption of less than 0.7%) and a high compressive strength of 240 kPa (35psi).

Owens Corning developed the FOAMULAR® 350 CVI board with drainage channels on the underside and around the entire perimeter. Compared to the FOAMULAR® 350 board, the FOAMULAR® 350 CVI board has the additional advantage of facilitating the flow of water infiltrated under the insulating boards to the waterproofing system's surface and drains.

FOAMULAR® F350 CVI is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

FOAMULAR® 400/600/1000 (Type 4)

FOAMULAR® 400/600/1000 insulation is an extruded Type 4 CAN/ULC-S701-CAN/CGSB-51.20-M87 polystyrene rigid board insulation that is specifically designed to provide high quality, economical insulation for conventional roofs, with single-ply, two-ply or four-ply roof membranes.

The extruded board has smooth, high-density skins, shiplap or Square edges on four sides and a very dense closed-cell foam sturcture. Board size is 600 mm x 1200 mm (2'x 8'), in thickness ranging from 25 mm to 100 mm (1" to 4"). FOAMULAR® 400/600/1000 has one of the highest thermal resistance values, an aged (RSI value of 0.88 per 25 mm (R5.0 per inch). It has excellent water resistance characteristics (absorption of less than 0.7%) and a high compressive strength of 275 kPa, 415 KPa, 690 KPa (40 psi, 60 psi, and 100 psi).

FOAMULAR® 400/600/1000 is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB (Type 4)

FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB insulation is an extruded Type 4 CAN/ULC-S701-CAN/CGSB-51.20-M87 polystyrene rigid board insulation that is specifically designed to provide high quality, economical insulation for conventional roofs, with single-ply, two-ply or four-ply roof membranes.

The extruded board has smooth, high-density skins, shiplap or Square edges on four sides and a very dense closed-cell foam structure. Board size is 600 mm x 1200 mm (2' x 8'), in thickness ranging from 38 mm to 76 mm (1.5" to 3"). FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB has one of the highest thermal resistance values, an aged (RSI value of 0.88 per 25 mm (R 5.0 per inch) for the FOAMULAR® 404/604 and (RSI value of 0.84 per 25 mm (R 4.75 per inch) for the FOAMULAR® 404 RB/604 RB. It has excellent water resistance characteristics (absorption of than 0.05%) and a high compressive strength of 275 kPa, 415 KPa, 690 KPa (40 psi, 60 psi and 100 psi).

Owens Corning developed the FOAMULAR® 404/604 boards with drainage channels around the board perimeter. Compared to a FOAMULAR® 400/600 board, the FOAMULAR® 404/604 board has the additional advantage of facilitating the flow of water infiltrated under the insulating boards to the waterproofing system's surface and drains.

The FOAMULAR® 404 RB/604 RB boards have as the additional feature of top side channels that help facilitate the flow of water to the system's drains.

FOAMULAR® 404/604 and FOAMULAR® 404 RB/604 RB is ideal for use in both standard and lightweight protected membrane roof systems and can be adhered or loosely applied. It is lightweight, easy to cut and simple to install year round.

Tech-Crete Processors Ltd.

Manufacturer: TECH-CRETE PROCESSORS LTD.

Contact Address: See Membership List Section 1

Product Group: CONCRETE TOPPED INSULATION ROOF PANELS FOR USE IN PROTECTED MEMBRANE ROOF ASSEMBLIES

Country of Origin: CANADACountry of Manufacture: Canada, 1983

DESCRIPTION

The roofing assembly / material information published in the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer's published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.

Tech-Crete™ insulated roof panels are 600 mm (2 ft. X 4 ft) composite panels of extruded, expanded, Type 4 CAN/ULC-S701-97 / CGSB-51.20-M87 polystyrene foam, with a factory applied 9.5mm (3/8”) latex modified concrete topping. They are designed as lightweight, self-ballasted, interlocking insulated panels for loose application on top of well drained roof membranes in a low-slope, protected membrane roof assembly.

Tech-Crete panels are tongue and grooved on the longitudinal sides, with a butt edge on the lateral ends. Each board weighs minimum 16.3 kg (36 lb.) creating an insulated panel assembly of about 22 kg/m² (4.5 lb/ft². Panels are available in standard thickness of 50 mm (2”) and 100 mm (4”). In addition, 75 mm (3”) thick panels are available as special order.

BASE INSULATION

The base insulation is Dow Roofmate*, a superior moisture resistant material (absorption less than 1%) with a high thermal resistance value of 0.88 (R 5.0 per inch.), and high compressive strength of 240 kPa (35 psi).

CONCRETE TOPPING The latex modified concrete topping is available in two standard colours, both with a relatively smooth surface:

CTI (Concrete Topped) Insulated Roof Panels are manufactured as a standard concrete grey colour.
SRI (Solar Reflective) Insulated Roof Panels are manufactured with a full depth white concrete topping.

PERFORMANCE

Latex modified concrete is very durable and chemically resistant. It can be cut with a masonry saw.

Concrete topped insulation roof panels can accept occasional maintenance foot traffic, however, they are not intended for use as a patio, plaza deck or construction platform.
As with other cementitious products, concrete topped insulation roof panels can become stained by efflorescence if stored unprotected for extended periods. This efflorescence will not be so obvious on SRI panels, however, care in scheduling and handling is required to ensure the white topping remains clean.
Concrete topped insulation roof panels are compatible with most commonly used membranes, however, in some cases a slip sheet between membrane and insulation is required to minimize cracking of the concrete topping.

CERTIFICATIONS AND APPROVALS

Complies with the following codes:

CCMC - Evaluation Listing #04888-L
CAN/ULC S107, Type 4 - standard for Thermal Insulation Polystyrene Boards.
CAN/ULC S107-03 Methods of Fire Tests of Roof Coverings

™ Trademark of Tech-Crete Processors Ltd. &ast;Trademark of the Dow Chemical Company

5.3.3 4.3.3 Expanded Polystyrene Foam (EPS)

Manufacturers and ProductsInformation: EPS InsulationMansonville Plastics (BC) Ltd.Plasti-Fab

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(See also 3.6.5 Expanded Extruded Polystyrene)

Third Party Certification: RGC welcomes and accepts the industry recommendation presented by all EPS manufacturers currently active in the B.C. market to require third party certification of the EPS products meeting CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87) requirements. It is understood that such a certification program requires annual inspections / recertification by an independent testing lab.

Molten polystyrene and a blowing agent are mixed and formed into uniform closed-cell structures (“beads”). These are later expanded up to 40 times by steam in a pre-expander. (The amount of expansion determines the density and, therefore, the thermal conductivity of the final product.) The expanded beads are stabilized in curing bins, fused into a billet in a block mold, and cut into the desired size, shape and thickness. This process produces rigid boards of interconnecting closed cells of densities varying from 16 to 48 kg / cu.m (1 to 3 lb / cu.ft). Expanded polystyrene insulation is commonly referred to as “beadboard” or “popcorn”.

Expanded polystyrene roof insulation is presently manufactured to the CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87) standard and is available in four types, depending on the physical properties of the material. Basically, the strength (tensile, compressive, flexural, and shear) and thermal resistance properties increase, and the water vapour permeance and water absorption properties decrease from Type 1 to Type 4. (For Type 2 and Type 4 see also Section 3.6.5 Extruded Expanded Polystyrene). Note: Type 4 is usually, if not always, extruded.

Expanded polystyrene foam roof insulation is combustible and, when used on steel decks or over a roof that is subject to fire exposure from below, a fire-rated underlayment or thermal barrier (such as gypsum board) may be required between the roof deck and the insulation (consult Building Code and insurance requirements).

Expanded polystyrene foam roof insulation provides the following properties and advantages:

Compatible with asphalt
Resistant to the effects of moisture
Resistant to cell deterioration (durable)
Resistant to impact
Resistant to thermal conductivity
Stable K-value (the thermal conductivity does not change with aging)

The possible disadvantages or precautions involved in the use of expanded polystyrene roof insulation include:

Flammable (combustible)
Affected by solvents (i.e. adhesives and cleaners used for single-ply membranes)
Heat sensitive [requires an insulation overlay (such as fibreboard) to prevent “burnouts” from hot asphalt]
Will not retain nails (requires screws and plates)
Dimensional instability may result from improper curing at the factory.

Mansonville Plastics (BC) Ltd.

Manufacturer: MANSONVILLE PLASTICS (B.C.) LTD.

Contact Address: See Membership List, Section 1

Product Group: EXPANDED POLYSTYRENE INSULATION

Country of Origin: Canada

Country of Manufacture: Canada

DESCRIPTION

The roofing assembly / material information published in the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

Korolite and Koroslope expanded polystyrene (EPS) manufactured by Mansonville Plastics (B.C.) Ltd. are rigid roof insulations, suitable for a variety of roof systems, supplied in both flat and sloped profiles. These insulations are closed cell, light weight and, because of their unique cellular structure, assure permanent thermal values.

They are 100% free of ozone depleting CFC’s and HCFC’s and can be recycled.

KOROLITE REGULAR INSULATION

This EPS flat insulation is the most popular insulation and provides the best value for thermal resistance in most roofing applications.

Thermal Resistance :	RSI = 0.65 / 25 mm (R Value = 3.75 / in.)
Uses:	All conventional roofs for single ply, 2 ply modified and built up roof membranes.
Standards:	Conforms to CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87) Type 1 thermal insulation expanded polystyrene.
Standard Sizes:	0.6 m x 1.2 m (24" x 48")	1.2 m x 1.2 m (48" x 48")	1.2 m x 2.4 m (48" x 96")
	Any thickness that is required to meet thermal requirements.

KOROLITE HD INSULATION

This EPS flat insulation is used when the roof design dictates the need for a greater compressive and thermal value.

Thermal Resistance :	RSI = 0.70 / 25 mm (R Value = 4.0 / in.)
Uses:	All conventional roofs for single ply, 2 ply modified and built up roof membranes; providing a higher thermal and compressive strength than Korolite Regular Insulation.
Standards:	Conforms to CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87) Type 2 thermal insulation expanded polystyrene.
Standard Sizes:	0.6 m x 1.2 m (24" x 48")	1.2 m x 1.2 m (48" x 48")	1.2 m x 2.4 m (48" x 96")
	Any thickness that is required to meet thermal requirements.

KOROSLOPE TAPERED INSULATION

Koroslope is a modular tapered insulation roof system designed to provide positive drainage of water on flat roofs.

Custom computerized design and roof layout drawings are provided.
The most commonly used slopes are 1:100 (1/8" in 12") and 1:50 (1/4" in 12")
Can be supplied in Type 1 or Type 2
Thermal Resistance: same as flat Type 1 or 2 per inch or mm of thickness
Meets the same CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87) Type 1 and 2 specification

Uses:

To add slope to all conventional roofs for single ply, 2 ply, and built up roof membranes
Crickets and backslope to direct water away from walls and projections and to provide slope in valleys, can also be supplied.

Standard Sizes: 1.2 m x 1.2 m (48" x 48")

Plasti-Fab

Manufacturer: PLASTI-FAB, division of PFB Corporation

Contact Address: See Membership List in Section 1.

Product Group: EXPANDED POLYSTYRENE INSULATION

Country of Origin: Canada

Country of Manufacture: Canada

DESCRIPTION

The roofing assembly / material information published in the RGC Roofing Practices Manual does NOT represent a complete set of the manufacturer's published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.

The Plasti-Fab™ PlastiSpan® trademark is applied to a series of moulded expanded polystyrene insulations (EPS) insulation materials manufactured by Plasti-Fab. These insulation materials are lightweight, easy to handle rigid thermal insulation materials. The closed cell structure of PlastiSpan insulation materials does not contain a captive blowing agent - e.g. HCFC’s - and assures constant thermal resistance properties. PlastiSpan insulation is manufactured in a range of densities and forms for use as a component in roofing assemblies.

PLASTISPAN INSULATION (TYPE 1)

PlastiSpan insulation identifies the most widely used PlastiSpan insulation in the family with a nominal density of 16 kg / m³(1.0 lb / ft³). It provides the best thermal resistance value in most roofing applications.

Thermal Resistance:	RSI = 0.65 m²•^OC / (W•25 mm)/R Value = 3.75 Ft ²•hr•^OF/(BTU•in)
	Compressive Resistance @ 10% Deformation: 70 kPa / 10 psi
Uses:	•Any conventional roofs with single-ply, two-ply or four-ply membranes where EPS insulation is permitted.
	• Under shingles (for cathedral ceilings).
Standards:	• Conforms to CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87), Type 1 expanded polystyrene thermal insulation.
	• Meets Building Code requirements for foamed plastic thermal insulation.
	• CCMC Evaluation Listing 12424-L.
Standard Sizes:	0.6 m x 1.2 m (24" x 48")	0.6 m x 2.4 m (24" x 96")
	0.8 m x 1.2 m (32" x 48")	1.2 m x 2.4 m (48" x 96")
	1.2 m x 1.2 m (48" x 48")
	Any thickness to meet thermal requirements.

PLASTISPAN HD INSULATION (TYPE 2)

PlastiSpan HD insulation identifies a thermal insulation with a normal density approximately 50% higher than PlastiSpan insulation (Type 1) at 24 kg / m³ (1.5 lb / ft³).

Thermal Resistance:	RSI = 0.70 m²•^OC / (W•25 mm)/R Value = 4.04 Ft ²•hr•^OF / (BTU•in)
	Compressive Resistance @ 10% Deformation: 110kPa / 16 psi
Uses:	•Any conventional roofs with single-ply, two-ply or four-ply membranes where EPS insulation is permitted.
	• Under shingles (for cathedral ceilings).
	• Used in any roofing applications in which heavier roof loads require a higher compressive strength than PlastiSpan insulation (Type 1).
Standards:	• Conforms to CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87), Type 2 expanded polystyrene thermal insulation.
	• Meets Building Code requirements for foamed plastic thermal insulation.
	• CCMC Evaluation Listing 12425-L.
Standard Sizes:	0.6 m x 1.2 m (24" x 48")	0.6 m x 2.4 m (24" x 96")
	0.8 m x 1.2 m (32" x 48")	1.2 m x 2.4 m (48" x 96")
	1.2 m x 1.2 m (48" x 48")
	Any thickness to meet thermal requirements.

PLASTISPAN INSULATION (TYPE 3)

PlastiSpan insulation (Type 3) identifies a thermal insulation with a nominal density approximately 100% higher than PlastiSpan insulation (Type 1) at 32 kg / m³ (2.0 lb / ft³).

Thermal Resistance:	RSI = 0.74 m2•OC / (W•25 mm) / R Value = 4.27 Ft 2•hr• OF / (BTU•in)
	Compressive Resistance @ 10% Deformation: 140kPa / 20 psi
Uses:	•Any conventional roofs with single-ply, two-ply or four-ply membranes where EPS insulation is permitted.
	• Under shingles (for cathedral ceilings).
	• Used in any roofing applications in which heavier roof loads require a higher compressive strength than PlastiSpan insulation (Type 1) or PlastiSpan HD insulation (Type 2).
Standards:	• Conforms to CAN / ULC-S701-97 / (CAN / CGSB-51.20-M87), Type 3 expanded polystyrene thermal insulation.
	• Meets Building Code requirements for foamed plastic thermal insulation.
	• CCMC Evaluation Listing 12426-L.
Standard Sizes:	0.6 m x 1.2 m (24" x 48")	0.6 m x 2.4 m (24" x 96")
	0.8 m x 1.2 m (32" x 48")	1.2 m x 2.4 m (48" x 96")
	1.2 m x 1.2 m (48" x 48")
	Any thickness to meet thermal requirements.

PLASTISPAN SLOPED INSULATION

The complete family of PlastiSpan insulation materials is available in both flat and sloped profiles. All roofing experts agree that adding a slope to the top surface of the roof assembly, however small, will provide positive drainage, eliminate pooled water, and can extend the life of the roof assembly. For sloped roofs, Plasti-Fab provides PlastiSpan insulation cut with a taper across the 1.2-rn (48") width. A predetermined layout of the tapered insulation boards is provided by Plasti-Fab in order to include a 1:50 (1/4" in 12") or 1:100 (1/8" in 12") positive slope to the drains.

Special sizes, “crickets”, and back slopes are available; custom computerized design of PlastiSpan sloped insulation boards layout is provided.

5.3.4 4.3.4 Polyisocyanurate Foam

5.3.5 4.3.5 Fibreboard Roof Insulation

Manufacturers and ProductsInformation: Fibreboard InsulationBuilding Products of Canada Corp.IKO Industries Ltd.Western Louiseville Fibreboard Inc.

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Fibreboard insulation is composed of wood, cane, or other vegetable fibres and waterproofing binders. A water slurry containing the wood fibres and waterproofing binders is deposited onto a moving screen. The water drains through the screen and the remaining mass is heated in an oven or dryer to produce the finished product. Fibreboard roof insulation is produced in several forms:

Plain
Impregnated with asphalt or petroleum based paraffin
Coated with asphalt

Fibreboard Roof Insulation that is adhered in a roof assembly with hot asphalt or asphaltic-based adhesives must have an asphalt coating on the top and bottom surfaces (minimum coated two sides) to meet RGC Guarantee Standards. Fibreboard for use as roofing insulation is manufactured to meet or exceed the requirements of CAN / ULC-S706 (Insulating Fibreboard), Type I (Roof Board).

Fibreboard roof insulation provides the following properties and advantages:

Compatible with asphalt
Compatible with most roof system components
Resistant to thermal conductivity
Resistant to cell deterioration (durable)
Resistant to impact
Resistant to thermal cycling (dimensionally stable)
Unaffected by asphalt application temperatures (no overlay required)
Stable K-value (the thermal conductivity does not change with aging)
Retains roofing nails

The possible disadvantages or precautions involved in the use of fibreboard insulation include:

Flammable (Combustible)
Absorbs moisture (protect from the effects of weathering)
Low thermal values
Organic in nature and will rot on exposure to moisture.

Building Products of Canada Corp.

Petroleum Paraffin-impregnated fibreboard conforming to CAN / ULC - S706-09

IKO Industries Ltd.

Asphalt-impregnated coated fibreboard conforming to CAN / ULC - S706-09

Western Louiseville Fibreboard Inc.

Petroleum Paraffin - Natural Fibreboard conforming to CAN / ULC - S706-09
Petroleum Paraffin - High Density natural Fibreboard conforming to CAN / ULC - S706-09
Asphalt Coated (6 sides) Natural Fibreboard conforming to CAN / ULC - S706-09
Asphalt and Wax Impregnated Fibreboard conforming to CAN / ULC - S706-09
Asphalt and Wax Impregnated High Density Fibreboard conforming to CAN / ULC - S706-09
Securpan - Fire Resistant Fibreboard conforming to CAN / ULC - S706-09
Securpan - Asphalt Coated (one side) Fire Resistant Fibreboard conforming to CAN / ULC - S706-09

5.3.6 4.3.6 Perlitic

Manufacturers and ProductsInformation: Perlitic InsulationJohns Manville Corporation

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Perlite ore is a volcanic glass with a natural water content characteristic. When this ore is heated to approximately +930^oC (+1700^oF) the water vaporizes and the ore expands into glass spheroids. The expanded perlite ore may be mixed into a water slurry formulation containing cellulose fibre, a small amount of asphalt, and sometimes starch. The slurry is then dried into boards and cut to size. The top surface is usually treated to minimize bitumen absorption.

Perlitic roof insulation provides the following properties and advantages:

Compatible with asphalt
Compatible with most roof system components
Resistant to thermal conductivity
Resistant to fire
Resistant to impact
Resistant to thermal cycling (dimensionally stable)
Unaffected by asphalt application temperatures
Stable K-value
Retains roofing nails

The possible disadvantages or precautions involved in the use of perlitic roof insulation include:

Absorbs moisture (protect from the effects of weathering)
Heavy equipment may compress boards causing possible debonding of the insulation from the deck
Extremely friable (crushable); proper compounding and correct grading is important
Relatively low thermal values.

Johns Manville Corporation

Manufacturer: JOHNS MANVILLE CORPORATION

Contact Address: See Membership List, Section 1

Product Group: PERLITIC ROOF INSULATION

Country of Origin: USA

Country of Manufacture: USA

DESCRIPTION

The roofing assembly / material information published in the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

FESCO BOARD

Fesco Board is a homogeneous board composed of expanded perlite, a volcanic ore, blended with selected binders and fibers. The perlite particles are subjected to intense heat, which causes them to expand approximately fifteen times their original size. The resulting glass-like beads contain air cells, which provide high insulating efficiency.

The top surface of Fesco Board is sealed with Top-Loc coating to ensure positive adhesion of a built-up or modified bitumen membrane. The minimum recycled content is 25% by weight.

Fesco Board has excellent fire resistance and is approved for use in Factory Mutual approved constructions. When applied over rigid decks, Fesco Board’s high laminar tensile strength resists damage from on-the-job and maintenance traffic, offers an excellent substrate for all roofing membranes, and effectively bridges flute openings in metal decks. Because of its perlite composition and low water absorption rates, Fesco Board is dimensionally stable.

Thermal Resistance	RSI = .49 / 25 mm (R value = 2.78 / inch)
Uses	Fesco Board is a rigid, thermal roof insulation for use in built-up, modified bitumen and some single ply roofing systems. It may be applied using hot bitumen and / or mechanical fasteners. It may be used as a primary or overlayment board.
Standards	CSA Standard A284-1976
	CAN / CGSB 51.10-92
	Underwriters Laboratory Canada
Standard Sizes	0.6 m x 1.2 m (24" x 48")	1.2 m x 1.2 m (48" x 48")	1.2 m x 2.4 m (48" x 96")
	Thicknesses - 18 mm (3/4"), 25 mm (1"), 38 mm (1.5"), 50 mm (2")
Compressive Strength	CSA A284-1976 34 psi
Density:	CSA A284-1976 13 pcf

TAPERED FESCO BOARD

Tapered Fesco is supplied in .61 m x 1.22 m (24" x 48") or 1.22 m x 1.22 m (48" x 48") boards, custom cut and tapered to 5.2 mm / m (1/16" / ft.), 10.4 mm / m (1/8" / ft.), 20.8 mm / m (1/4" / ft.), or 41.6 mm / m (1/2" / ft.) slope depending on the need. Custom sizes are available. Johns Manville’s Tapered Design Center has computerized design service, as well as shop drawings for application for the architect and roofing contractor.

5.3.7 4.3.7 Mineral Fibre Roof Insulation

Manufacturers and ProductsInformation: Mineral Fibre Roof InsulationRoxul, Inc.Soprema Inc.

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Mineral fibre roof insulations are composed of rock fibres with a thermoset resin and surfaced with glass fibre scrim on the top surface. These boards can provide a suitable surface for directly mopped bituminous membranes, however, a minimum one layer fibreboard overlay is recommended.

Mineral fibre roof insulation may provide the following properties and advantages:

compatible with asphalt
compatible with most roof systems
resistant to thermal conductivity
excellent resistance to the effects of moisture
resistant to fire
resistant to cell deterioration (non-corrosive)
resistant to thermal cycling (dimensionally stable)
stable K value (thermal conductivity does not change with age)
conforms to substrate irregularities
can be hot mopped or mechanically fastened

The possible disadvantages or precautions involved in the use of mineral fibre roof insulation:

heavy equipment may compress the insulation and cause delamination of the membrane
not intended for use under high traffic deck surfaces

Mineral fibre roof insulation should meet or exceed CAN / ULC S126.M86.

Roxul, Inc.

Manufacturer: Roxul INC. Contact Address: See Membership List, Section 1

Product Group: TOPROCK DD STONE WOOL ROOF INSULATION

Country of Origin: Denmark

Country of Manufacture: Canada

DESCRIPTION

The roofing assembly / material information published in the RGC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

TOPROCK DD STONE WOOL Insulation is a monolithic dual density stone wool fibre insulation made from basalt rock and slag. It is a non-combustible and fire resistant, is extremely dimensionally stable with excellent acoustic properties. It is water repellent yet vapour permeable and made from natural and recycled products, is impact resistant, and its thermal value and excellent physical properties make it an exceptional choice for use in the commercial roofing market in both new and re-roof applications as a primary insulation or an overlay insulation. Toprock Stone wool contributes significant advantages to long term performance of roofing membrane assemblies.

TOPROCK DD & DD PLUS

Toprock DD is dual-density mineral wool with a rigid upper surface for durability and enhanced strength. It is intended for use as a primary insulation in commercial, industrial, and institutional new and re-roof applications. It can be mechanically fastened or hot mopped in a full bed of bitumen. Toprock DD PLUS has an integral bitumen coating applied to allow for torch applied, hot applied or cold applied adhered membrane assemblies direct to the insulation without the use of a coverboard.

Thickness - mm (inches) - 25 (1”) to 150 (6”) in 12mm (1/2”) increments except no 3” (only 3.25 R 12)

Dimensions - m (ft) - 1.2 x 1.2 (4’ x 4’)

Long Term Thermal Resistance - Stable - ASTM C518 (C 177) - RSI Value - 0.65 (R 3.7) per 25mm (1”)

Compressive Strength - ASTM C 165

Top Layer at 10% - kPa (psi) 139 (20.2 psi)
Top Layer at 25% - kPa (psi) 252 (37.0 psi)
75mm (3”) thickness - kPs (psi) 71 (10.3 psi)
75mm (3”) thickness - kPa (psi) 103.5 (15psi)

Density (kg/m3) - Formed as a monolithic structure - ASTM C612-00 - Actual

Top Layer - 220 (13.75 lb/ft3)
Bottom - Layer - 160 (10.0 lb/ft3)

Dimensional Stability - Linear Shrinkage (% at 177C (350F) - ASTM C 356 - 0.01%

WaterAbsorption (%) - ASTM C 209 - < 1.0 - Water Vapour Sorption - ASTM C 1104 - 0.03

Roxul Inc. may modify the composition of its products without prior notice. Consequently orders will be filled according to the latest specifications.

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Soprema Inc.

Manufacturer: SOPREMA INC.

Contact Address: See Membership List, Section 1

Product Group: SOPRAROCK STONE WOOL ROOF INSULATION

Country of Origin: Denmark

Countryof Manufacture: Canada

DESCRIPTION

The roofing assembly / material information published in the RGC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

SOPRAROCK STONE WOOL is a mono or dual density mineral wool fibre insulation made from basalt rock and slag. It is a non-combustible, has excellent fire resistant, and is an extremely dimensionally stable insulation with excellent acoustic properties. It is a water repellent yet vapour permeable insulation made from natural and recycled products, is impact resistant, and its thermal value and excellent physical properties make it an exceptional choice for use in the commercial roofing market in both new and re-roof applications as a primary insulation or an overlay insulation. Soprarock Stone wool contributes significant advantages to long term performance of roofing membrane assemblies.

SOPRAROCK MD & SOPRAROCK MD PLUS

Soprarock MD is mono-density mineral wool for use as a cover board for other insulations or over-top applications and can be mechanically fastened or hot mopped in a full bed of bitumen. Soprarock MD PLUS has an integral bitumen coating factory applied to allow for torch applied, hot applied or cold applied adhered membrane assemblies direct to the insulation.

Thickness - mm (inches) - 25 (1”)

Dimensions - m (ft.) - 1.2 x 1.2 (4’ x4’)

Long Term Thermal Resistance - Stable - ASTM C 518 (C 177) RSI Value - 0.62 (R-3.5) per 25mm (1”)

Compressive Strength - 25mm (1”) thickness - ASTM C165 - 84 kPa (12.1 psi)

Density (kg/m2) - ASTM C 612-00 - Actual - 176 (11 lb/ft3)

Dimensional Stability, linear shrinkage (% @ 177 C [350 F]) - ASTM C 356 - 0.01%

Water Absorption (%) - ASTM C 209 - < 1.0

SOPRAROCK DD & DD PLUS

Soprarock DD is dual-density mineral wool with a rigid upper surface for durability and enhanced strength. It is intended for use as a primary insulation in commercial, industrial, and institutional new and re-roof applications and can be mechanically fastened or hot mopped in a full bed of bitumen. Soprarock DD PLUS has an integral bitumen coating applied to allow for torch applied, hot applied or cold applied adhered membrane assemblies direct to the insulation without the use of a coverboard.

Thickness - mm (inches) - 25 (1”) to 150 (6”) in 12mm (1/2”) increments

Dimensions - m (ft) - .12 x 1.2 (4’ x 4’)

Long Term Thermal Resistance - Stable - ASTM C518 (C 177) - RSI Value - 0.65 (R 3.7) per 25mm (1”)

Compressive Strength - ASTM C 165

Top Layer at 10% - kPa (psi) 139 (20.2 psi)
Top Layer at 25% - kPa (psi) 252 (37.0 psi)
75mm (3”) thickness - kPs (psi) 71 (10.3 psi)
75mm (3”) thickness - kPa (psi) 103.5 (15psi)

Density (kg/m3) - Formed as a monolithic structure - ASTM C612-00 - Actual

Top Layer - 220 (13.75 lb/ft3)
Bottom - Layer - 160 (10.0 lb/ft3)

Dimensional Stability - Linear Shrinkage (% at 177C (350F) - ASTM C 356 - 0.01%

Water Absorption (%) - ASTM C 209 - < 1.0

Water Vapour Sorption - ASTM C 1104 - 0.03

Soprema Inc. may modify the composition of its products without prior notice. Consequently orders will be filled according to the latest specifications.

Click on any one of the tabs to the right to find products by manufacturer

5.3.8 4.3.8 Lightweight Insulating Concrete

Manufacturers and ProductsInformation: Lightweight Insulating ConcreteSiplast Canada Inc.

Click on any one of the tabs to the right to find products by manufacturer

See manufacturer information on the following tab.

Siplast Canada Inc.

Manufacturer: SIPLAST CANADA INC.

Contact Address: See Membership List, Section 1

Product Group: LIGHTWEIGHT INSULATING CONCRETE

Country of Origin: France, USA, Germany, Poland, Denmark

Year First Installed: BC: 2003

Canada: 1995

Foreign: 1935

DESCRIPTION

The roofing assembly / material information published in the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

NVS and Insulcel are composite systems that combine the unique properties of Lightweight insulating concrete (LWIC) and premium expanded polystyrene (EPS) foam insulation. The polystyrene insulation board can be installed in thicknesses necessary for high insulation values and in a stair stepped fashion, facilitating a positive slope to drain.

Poured 25 mm (1") for NVS and 50 mm (2") for Insulcel thickness over EPS insulation, these LWIC systems have been engineered for use over non-slotted or slotted galvanized corrugated metal decks (Insulcel), structural concrtete substrates and, where appropriate, over existing roofs in recover applications. These systems provide high performance solutions to industry concerns that include moisture resistance, high compressive strength, dimensional stability, fire and wind resistance, stable R-values and environmental safety. As a reusable resource LWIC also provides LEED values and is re-roofable.

PRODUCTS

NVS concrete is a 1:3.5 volume ratio of Portland cement to patented NVS Concrete Aggregate.

INSULCEL concrete is a mixture of Insulcel-PB pregenerated cellular foam and Portland cement / water slurry.

Dry Density:	NVS - 560 kilograms per cubic meter (Kg/cu.m), (35 lbs. pcf) Insulcel - 480 kilograms per cubic meter (Kg/cu.m), (30 lbs. pcf)
Min. Compressive Strenght:	NVS - 2070 kilopascals (kPa), (300 psi) Insulcel - 1380 kilopascals, (kPa), (200 psi)
Uses:	Recover and existing roof system (consultant validated). Compensate for irregularities in existing substrates - slope to drain. High compressive strength reduces potential damage from foot and other traffic. Monolithic Mass effect improves long term membrane performance. LEED value. Save disposal costs and space in landfills. Temperature Restrictions - do not install below 0ºC or 32ºF. Do not apply during or in the event of rain. Improved contractor installation performance.
Standards:	Factory Mutual NVS 1-90 and 1-150 Insulcel RT 1-90 and 1-195 Metro-Dade Product Control No. 02-0411.01 and 03-320.13 ASTM C332, ASTM C578

5.4 4.4 Insulation Coverboards

Insulation coverboards are installed over insulation, when required by the RoofStar Guarantee Standards. For Guarantee Standards concerning Insulation Coverboards, refer to C6 in this section of the RPM.

5.4.1 4.4.1 Insulation Joint Tape

Manufacturers and ProductsInformation: Joint TapeHal Industries Inc.Johns Manville CoporationFelt ManufacturersOther Manufacturers

Click on any one of the tabs to the right to find products by manufacturer

Where RGC Guarantee Standards or the roof system specification calls for taping fibreboard or insulation joints, the following tabs for manufacturers and their approved products applies:

Perma-Tape
Therma-Tape

Roof Tape

No. 15 perforated asphalt felt conforming to CSA A123.3M]

Breather-type membrane sheathing conforming to CAN / CGSB-51.32-M77

5.5 4.5 Membranes

5.6 4.6 Fasteners
Manufacturers and Products

Refer to Membrane / Insulation Manufacturer Specifications and RGC Guarantee Standard A4.3 Insulation Fastener

6 5. SBS Application and Safety: Best Practices
Modified bitumen roofing membranes represent the latest in the evolution of bituminous roofing systems. However, some systems require that applicators use a propane-fuelled open flame torch to adhere the membrane. When working with an open flame on the construction site, applicators must use extreme caution to prevent accidents. Carelessness could lead to loss of property or life.
This section contains precautions for applying modified bitumen roofing. The applicator will find proper procedures for working with equipment on the jobsite, and dealing with personnel.NOTE: If a fire occurs for any reason, call the fire department immediately, even if you put out the flames. Some material may smoulder for hours before bursting into flames, and could be smouldering in places where the layman may not think to look. Let the fire fighters do their job. Safety is no accident.
6.1 5.1 EQUIPMENT
Applicators use an open flame to soften the bitumen on the underside of the membrane to make it adhere to the roofing substrate. At a temperature of 1100^oC (2000^oF), the flame produced by liquid propane gas does an excellent melting job. But used incorrectly or carelessly, the flame could damage the roof or the building and seriously injure the applicator.
Applicators should receive training in proper application, maintenance and safety procedures when handling torching equipment.
Operators should handle their equipment carefully. Protect the soft brass valve of the gas cylinder. It is easy to crack or break it. A broken valve could turn the cylinder into a projectile. Check all cylinders before refilling. Never overfill a cylinder. It could explode.
All applicators of modified bitumen should participate in the safety and training program.
6.1.1 5.1.1 General
Use well-built durable products that feature safety devices and are listed by Underwriters Laboratories of Canada (ULC).

Follow the manufacturer's safety and operating instructions provided with the torch system.

Check all equipment for wear. Remove and replace as necessary.

Use soap solution to test for gas leaks before lighting, then check for proper operation of the torch.

Check all fittings and other equipment on the applications equipment for leakage.

Be sure that torching equipment is in good working order and that the cylinder valves are clean.

Stop work and shut off flame if propane odour is detected.

Stop work, investigate and make corrections if a leak occurs.* Keep non-applicators at least 3 m (10') from the flame.

Protect your equipment: store it in a toolbox.

Do not use matches or a cigarette lighter to test for gas leaks.

Containers which hold or may have held flammable material must be kept clear of the torch or other heat sources.

Do not use equipment that has been damaged or that is in need of repair.
6.1.2 5.1.2 Tanks
Protect cylinder valves; where possible use cylinders that have valve protection welded to the cylinder.

Propane tanks are pressurized – do not puncture or subject to extreme heat.

Secure propane tanks in an upright position and place them at least 3 m (10') from the open flame.

Increase the size of the tank to keep frosting from occurring.

Close the propane tank valve first and let the remaining gas burn out of the hose before closing the torch valve when shutting off the torch.

Plug the valve with a plastic plug when cylinder is not in use.

Do not turn a vapour draw tank on its side to increase pressure - liquid could escape.

Do not heat a tank to increase pressure.

Do not fill a propane tank that is in need of repair.

Do not over tighten the brass fittings.
6.1.3 5.1.3 Regulators
Use an adjustable ULC listed regulator with the torch.

Make sure flow of gas through the regulator is in the proper direction. Directional flow is stamped on regulator.

Keep vent in pressure regulator clear at all times.

Do not use an adjustable regulator with a higher pressure range than the one that came with the torch.

Do not operate any pressure gauge beyond the top of its scale or near excessive heat (above 65°C) or where there is excessive vibration.* Do not use equipment without a properly operating regulator.
6.1.4 5.1.4 Hoses
Check hoses for wear and tear.

Use only hoses listed for propane gas by the Canadian Gas Association as applicable for the device.

Use no more than 15 m (50') of hose at one time.
6.1.5 5.1.5 Torches
Use an adjustable pilot light with a complete shut-off.

Only use a torch stand to direct flame upward when not in use. Do not use a trowel as a torch stand.

Use only torch machines equipped with the same safety features as described for torches. They should also have individually adjustable torches. Use only torch trolleys and multiple head machines with approved safety valves.

Ignite burner with a flint or electronic lighter. Matches or disposable lighters are unsafe substitutes.

Do not play with a torch. Treat the torch as if it is always burning. A flame can be hard to see on a bright day and can burn skin or clothing instantly. When working around mechanical equipment, it can be difficult to hear the torch operating.

Be very careful when working with torches in areas where you can not see. Pull material away, heat it, and then apply it to the surface.

Do not leave lighted torch unattended.

Do not lay operating torch over the edge of a roof.

Do not lay an operating torch to rest on a propane tank. If there is a gas leak, a fire could be ignited.
6.1.6 5.1.6 Extinguishers
Have at least one Class ABC fire extinguisher within 6 m (20' ) of each worker using a torch.

Train each torch operator in the proper use of fire extinguishers.

Direct the stream from a dry chemical-type fire extinguisher at the base of the fire from a distance of at least 3 m (10'). Sweep the fire away from you, starting at its nearest point and moving the chemical stream toward the farthest point.

Do not try to put out a propane tank fire if it cannot be done without shutting off the cylinder valve OR tipping the cylinder. Let it burn and call the fire department.

Do not place fire extinguisher too close to liquid propane gas equipment. If fire results, you may not be able to get at fire extinguisher to put out the fire.
WHEN IN DOUBT – CHECK IT OUT.
IF STILL IN DOUBT – DON'T USE IT.
6.2 5.2 BUILDINGS
Each building is different from every other building, and each roof design presents a new set of challenges to the roofing contractor. The applicator of modified bitumen systems must adapt his standard safety procedures to meet the special requirements of the current job. However, roofers should follow the basic rules presented in these pages.
The supervisor must conduct a fire risk assessment before any Torch Applied hot-work is started and complete their company's Hot-Works assessment form work.
The job supervisor should take extra care when working on a torch applied modified bitumen roofing project. A responsible person should conduct a fire watch over the work area a minimum of one hour after all torches have been extinguished and record the findings of the fire watch on their company's fire watch form. The delay will help guard against a smouldering fire going undetected at the end of the work day. Check for potential "hot spots" with an infra-red scanner, especially at upstands, eg wall transitions, around penetrations such as vent pipes, intake vents and skylights etc. If accessible (new construction projects) check and scan the underside of the deck before ending your fire watch, or walk back through the building interior before concluding the fire watch.
Applicators must take special care when torching at flashings, corners, or voids in the roof deck. Never torch directly at these locations. Always use self adhered or cold applied materials at these fire sensitive locations.
6.2.1 5.2.1 General
Use protective shielding when using torch application near any upstands.

Shut down air conditioning units, exhaust fans and air intake fans in the work area at the roof control. This must be coordinated with the owner or building maintenance staff.

Do not work in an enclosed area where gas can accumulate.
6.2.2 5.2.2 Substrates
Use perlite, fibreglass, or concrete cant strips if cant strips are required.

Use a protective base sheet on all wood decks and over ignitable insulation, can strips or other flammable surfaces.

Look for any void, hole or gap in the substrate and repair.

Use a base ply over all ignitable insulation surfaces, edges and over all joints between rigid insulation boards. The base ply provides a protective covering for underlying ignitable materials.

Install a cover board or base ply, acceptable to the membrane manufacturer, to separate polyurethane or polyisocyanurate roof insulations from the modified sheet and the torch.

Install a cover board or base ply over all ignitable surfaces. Be sure base ply fits tightly around all roof deck openings and turns up the wall, so the flame cannot flash down and start a fire underneath the deck.

Do not torch to wood fibre insulation, cant strip, wood or any ignitable material.
6.2.3 5.2.3 Torching Methods
Follow manufacturer's recommendations on torching to insulation and recover board surface.

Use a small torch when flashing near details.

Shield air conditioning units and other protrusions with when using the torch around them.

Heat the membrane away from air conditioning units, fans, soil pipes and all other protrusions. Care must be taken to avoid flame being pulled into the building interior.

Feather seams around details with a hot trowel, not open flame.

Use self adhered or cold adhesive membrane flashings at corners, or voids in the roof deck. Never torch directly.

Use caution when torching near pipes in the event there is suction present.

Do not torch anything you cannot see such as under air conditioning units or behind counter flashing.

Do not torch near gas lines or near electric wires (such as around roof top equipment, etc.).

Do not torch around flammable vents or plastic projections.

Do not point the torch under rooftop equipment.

Do not point the torch down open roof penetrations.

Do not point the torch into corners or roof edges where dried wood or fibre may ignite (such as wood blocking or cant strip).

Do not point the torch at low flashings where there is an overhang and flame could get up under the counter flashing, such as around skylights or prefabricated curbs with fibreboard sidewall insulation.

Do not apply modified bitumen products directly over exposed conduits or pipes lying on the roof deck.

Avoid prolonged contact with heat sensitive metals such as lead, as overheating of these metals could ignite underlying flammable services.

Do not lay an operating torch directly onto the membranes – there is a danger both of fire and of damaging the membrane.

Do not lay an operating torch on an open penetration on the roof. If the penetration is part of an air intake system, the flames could be sucked into the building.
6.3 5.3 PERSONNEL
Many construction-industry tradesman use open flames or flame tools in their jobs. Heating and air conditioning contractors, welders and plumbers all use open flame at the job site. These professionals are responsible for the safe use of their tools, just as the roofing contractor is responsible for the safe application of modified bitumen roofing systems.
Contractors must not only train their own men in using open flame application, but must also make sure the general contractor and his superintendents are familiar with the necessary safety precautions for using torch application of roofing membrane.
Some of the safety precautions will be considered unpleasant, such as wearing long-sleeve shirts and long pants in the summer, but the results – a safe, injury-free job site – are worth the effort.
6.3.1 5.3.1 General
Wear proper clothing: non-synthetic fabrics, long-sleeve shirt, long pants, boots, gloves and proper eye protection.

Keep non-applicators at least 3 m (10' ) from open flame.

Train, instruct, and warn employees on the use of torching equipment.

Use extra caution around edges of insulation board. Cover exposed edges with a fire guard base ply to prevent flame from coming in contact with any ignitable material. Contact for any length of time with lead or other materials affected by heat should be avoided.

Do not take anything for granted. Be on guard against lapses in on-the-job safety.
6.4 5.4 FIRE DEPARTMENT
For years fire departments have been learning the proper safety precautions necessary to prevent fires. Their expertise and assistance should be utilized whenever possible to supplement a company's safety training program. By making the local fire department a part of your team, you are giving notice that in all cases Safety Comes First.
6.4.1 5.4.1 Fire Department Recommendations
Strict compliance with local fire codes must be maintained.

Give written notice to the local fire department where required, and obtain any necessary permits.

One fire extinguisher for each torch operator shall be on the roof at all times.
Report ALL fires to the fire department – even those that are extinguished quickly – there may still be fire and / or smouldering in areas where a layman may not think to look.
7 6. SBS Master Specifications
NOTE: this needs to be a downloadable form, using the Build-Your-Own-Roof tool which can export materials into the form. Consequently, this form must be radically altered.
Intended as a guide for developing office master specifications or preparing project specifications.
Edit and amend to suit required purpose.
SECTION 07535
PROJECT NO. (OPTIONAL)
PROJECT NAME (OPTIONAL)
[MODIFIED] [OXIDIZED] BITUMEN SHEET ROOFING
PAGE [ ] OF [ ]
PART 1 - GENERAL
Work Included: (this clause is optional and, if using, ensure description of work is complete.)

Related Work: (reference appropriate sections and ensure list is complete) eg:
Section 06100 Rough Carpentry (Cants, Blocking, etc.)

Section 07311 Asphalt Shingles

Section 07600 Flashing and Sheet Metal

Section 15440 Plumbing (Supply of Roof Drains)

Quality Assurance:
Workmanship Standards:
Conform to the latest Guarantee Standards of the Roofing Contractors Association of British Columbia (RGC) as published in the “RCABC Roofing Practices Manual” for a five (5) or ten (10) year Guarantee, unless modified by the contract documents to exceed those minimums.

The owner or the owner's representative should identify applicable code and insurance requirements relating to the roof assembly.

Qualification of Workers: Employ skilled applicators approved by membrane manufacturer.

Independent Inspection: (Preferred Wording)
Perform using an independent inspection company acceptable to RGC, [the owner, and the consultant] namely: _______________ (name of Inspection Company).

Perform as required by RGC under the five (5) or ten (10) year Guarantee Program.

Inspection costs for the Guarantee will be paid for directly by owner, and are not included in this contract.

Independent Inspection: (Optional Wording)
Perform using an independent inspection company acceptable to RGC, [the owner, and the consultant] to be assigned by RGC.

Perform as required by RGC under the five (5) or ten (10) year Guarantee Program.

Inspection costs for this Guarantee are included in this contract.

Submittals:
Provide the owner with an “RGC Roofing System Record” upon completion of this contract. (Includes RoofStar Guarantee, copies of inspection reports, and Roof Maintenance Guide.)

Provide the owner with one set of any required Material Safety Data Sheets (MSDS) prior to commencement of work, for review and posting on job site.

List other submittal requests here, eg: shop drawings, samples, product literature, etc.

Product Delivery, Storage, and Handling:
Deliver and store materials in original containers with manufacturer's labels and seals intact.

Store materials elevated from contact with ground and moisture and protected from weather.

Store membrane rolls on end, one pallet high, selvage edge up; do not store in a leaning position.

Where climatic conditions warrant, store membrane rolls in heated enclosures prior to use, as recommended by manufacturer; bring only enough rolls for immediate use to work area.

Avoid prolonged exposure of light and heat sensitive materials to sunlight.

Store combustible materials away from heat and open flame.

Consult the manufacturer's material safety data sheets for materials on this project.

Guarantee:
Provide the standard Roofing Contractors Association of British Columbia (RGC) five (5) or ten (10) year Guarantee.

PART 2 - PRODUCTS
Roofing Materials:
Standards: conform to the RGC Guarantee Standards and to the appropriate CSA, CGSB,ULC, and ASTM Standards for the materials used in the roofing system specified; materials to be listed in the RGC Accepted Materials List of the RCABC Roofing Practices Manual.

Standards: (optional); conform to the requirement of ULC Design No.[ ]. (The design authority is responsible for identifying applicable code and / or insurance requirements governing material selection.)

Use only components supplied or accepted by membrane manufacturer.

Gypsum: (over steel deck as membrane underlay or thermal barrier); minimum [12.7 mm (1/2")] [15.9 mm (5/8")] thick; 1200 mm x 2400 mm (4' x 8' ) sheets; [standard] [type X] [siliconized with fibreglass facers]; conform to CSA A82.27-M1977.

Gypsum Fasteners: No. 10 flat-head, countersunk, self-tapping screws, Type [A, AB], Philips, [cadmium-plated], [19 mm, 25 mm] [3/4", 1"] long, to CSA B35.3-1962.

Vapour Retarder: (the selection of, and the requirement for, the vapour retarder is determined by the design authority.) or [as recommended by membrane manufacturer]

Base / Separation Sheets: proprietary sheets approved by membrane manufacturer.

Asphalt: oxidized roofing asphalt conforming to [CSA A123.4-M1979, Type 3 (steep)] [ASTM D312-78, Type IV (special steep)].

Insulation Overlay:
11 mm (7/16") asphalt-impregnated fibreboard conforming to CAN / CSA- A247-M86, Type 1; [asphalt-coated one side] [asphalt-coated both sides]

13 mm (1/2") Perlitic Retro-fit Board to CAN / CGSB 51.10-92 or

RGC accepted asphaltic overlay board

Filter Fabric: 100% woven polyolefin; proprietary alternatives approved by membrane / insulation manufacturer.

Gravel: (where pour coat and gravel surfacing options are approved by membrane manufacturer); clean, washed, round or crushed stone; opaque to ultraviolet light; gradations according to RGC Guarantee Standards.

Gravel Ballast: (for Protected Membrane and Modified Protected Membrane Roof Assemblies); clean, washed, round or crushed stone; gradations according to RGC Guarantee Standards.

Membrane Fasteners: (proprietary type approved by membrane manufacturer).

Termination Bars: (proprietary type approved by membrane manufacturer).

Insulation Fasteners: [( ) mm] [( )"]; {screws and [plastic] [steel] stress plates} [RGC accepted nails (over wood decks only)].

Membrane Accessories: (List membrane manufacturer's proprietary accessories here. For Example: adhesives; sealants / mastics; prefabricated flashings; walkway pads; coatings, etc.)

Roof Insulation:
Glass Fibre: conform to CAN / CGSB-51.31-M84; top surface finished with asphalt-coated kraft paper; ( ) mm [( )"] thick; [RSI ( )] [R ( )]; {tapered to provide 1: ( ) [( )" in 12"] slope, minimum thickness ( ) mm [ ( )"] at drains}.

Extruded Expanded Polystyrene: conform to CAN / ULC-S701-97, Type [2,4]; [shiplapped] [butt] edges; ( ) mm [( )"] thick; [RSI ( )] [R ( )]; {tapered to provide 1: ( ) [( )" in 12"] slope, minimum thickness ( ) mm [( )"] at drains}.

Expanded Polystyrene: conform to CAN / ULC-S701-97, Type [1,2,3,4,]; [shiplapped] [butt] edges; ( ) mm [( )"] thick; [RSI ( )] [R ( )]; {tapered to provide 1: ( ) [( )" in 12"] slope, minimum thickness ( ) mm [( )"] at drains}.

Polyurethane: conform to {CGSB 51-GP-21M 1978 (unfaced polyurethane), Type [1,2,3], Class [1,2,3]} {CAN / CGSB-51.26-M86 (faced polyurethane), Type [1,2,3,4], Facing [1,2,3,4,], Surface Burning Characteristic [a,b] }; [with shiplapped edges] [channel vented]; ( ) mm [( )"] thick; [RSI ( )] [R ( )].

Polyisocyanurate: conform to {CGSB 51-GP-21M 1978 (unfaced polyisocyanurate), Type 4, Class [1,2,3] } {CAN / CGSB-51.26-M86 (faced polyisocyanurate), Type [1,2,3,4], Facing [1,2,3,4], Surface Burning Characteristic [a,b] }; ( ) mm [( )"]; [RSI ( )] [R ( )].

Fibreboard: conform to CAN / CSA-A247-M86, Type 1; [shiplapped] [square] edges; ( ) mm [( )"] thick; [RSI ( )] [R ( )].

Perlitic: conform to CAN / CGSB 51.10-92 ( ) mm [( )] thick [RSI ( )] [R ( )].

Roof Membrane:
Base Sheet: minimum [ ] mm thick, {( )% [SBS][APP] modified} [oxidized] bituminous membrane; minimum [ ] kg / m² total weight with ( ) g / m² [non-woven] [woven] [polyester] [fibreglass] [and ( ) g / m² non-woven fibreglass] reinforcing; [sanded] [polypropylene] bottom surface and [sanded] [polypropylene] top surface; for [torched] [mopped] [adhesive] application; {conforming to CGSB 37-GP-56M 1985, Type [1,2] [a,b,c], Class C, Grade [1,2] }; [minimum tensile strength ( ) N/50 mm].

Cap Sheet [Single Ply]: minimum [ ] mm thick, {( )% [SBS][APP] modified} [oxidized] bituminous membrane; minimum [ ] kg / m² total weight with [( ) g / m² [non-woven] [woven] [polyester] [fibreglass] [and ( ) g / m² fibreglass] reinforcing; [sanded] [polypropylene] bottom surface and [sanded] [polypropylene] [granular] [metal foil] top surface; for [torched] [mopped] [adhesive] application; {conforming to CGSB 37-GP-56M 1985, Type [1,2] [a,b,c], Class [A,B,C], Grade [1,2]}; [minimum tensile strength ( ) N/50 mm].

Base & Cap Membrane Flashing: (Generally, the base and cap membrane flashing should, as a minimum, be the same weight and reinforcing as the roof membranes. Often manufacturers recommend higher mass sheets with more reinforcement, and in many cases torched application is required. Consult membrane manufacturer.)

PART 3 - EXECUTION
Preparation:
Ensure membrane substrate is rigid, dry, smooth, compatible, free of fins and sharp edges, and clean of all debris and foreign matter.

Ensure all openings, walls, and projections through the roof are firmly affixed and [cant strips,] reglets and nailing strips are in place. (Cant strips are not required by some membrane manufacturers).

Install a [mechanically fastened] base ply to membrane manufacturer's specification [over wood board deck] [where required].

Satisfy the membrane manufacturer's specifications for substrate preparation prior to membrane application.

A thermal barrier may be required between the roof deck and some insulations. Building code and insurance requirements to be identified by design authority.

Primer:
Prime wood, concrete, and metal surfaces to be directly adhered with bituminous membranes; allow to dry.

Consult membrane manufacturer for specific requirements.

Vapour Retarder:
The design authority determines the necessity for and the placement of the vapour retarder.

Insulation: (under membrane)
Install insulation in moderate contact (without forcing); stagger end joints; provide a smooth surface to accept roof membrane.

Install insulation according to RGC Guarantee Standards over nailable decks.

Embed insulation in 1.5 kg / m² (30 lb / square) mopping of hot asphalt over non-nailable deck.

Install tapered insulation according to insulation manufacturer's shop drawings.

Install only as much insulation as can be covered with roof membrane on the same day.

Install wood nailing strips (insert where slopes exceed manufacturer's recommendation); ensure nailer is flush with insulation surface. (On uninsulated or PMR systems, wood nailers must be flush with deck and are the responsibility of others.)

Install 11 mm (7/16") asphalt-impregnated fibreboard, 13 mm (1/2") Perlitic Retro-fit Board as an insulation overlay, or RGC accepted asphaltic overlay board, where required by RGC Guarantee Standards.

Base Sheet: (two-ply membrane)
Start at the low point and [at right angles] [parallel] to the slope. (Some specifications require the membrane be installed parallel to the slope for high slope applications, consult membrane manufacturer.)

Unroll and align membrane; lap sides [( ) mm] [( )"] and ends [( ) mm ][( )"]; stagger end laps [( ) mm] [( )"].

Carry base sheet to [top of cant] [base of wall / curb]. (Some manufacturers do not require cants and may specify that the base sheet not be bonded to the cant if present; consult membrane manufacturer.)

Asphalt-adhered:
Reroll approximately half the membrane into a firm roll.

Embed membrane in [( ) kg / m²] [( ) lb / square] hot asphalt; minimum asphalt application temperature +205°C (+400°F) at the roll.

Limit mopping distance to 1 m (3') ahead of unrolling membrane to ensure proper asphalt application temperature is maintained.

Apply even pressure on membrane as it is unrolled; do not “kick the roll out”; a visible “wave” of asphalt must precede the roll.

Reroll opposite end and repeat process.

Mechanically fasten head laps. (Consult membrane manufacturer for specific recommendations on slopes over 1:24 (1/2" in 12") ).

Torch-adhered: (modified membranes only)
Reroll approximately half the membrane into a firm roll.

Direct propane torch along underside of roll, melting the surface modified bitumen; preheat seam of previous roll concurrently.

Unroll membrane as modified bitumen melts.

Push first roll back after starting to check for full bonding of the membrane; adjust torching and speed accordingly; avoid stopping and starting which may cause voids or insufficient bonding.

Bevel “T” joints at roll ends and repair “fishmouths” using a torch-heated trowel.

Reroll opposite end and repeat process.

Mechanically fasten head laps. (According to membrane manufacturer's recommendations.)

Adhesive-applied: (This option is a special application and when offered as an alternative method the membrane manufacturer must approve the system and the application.)
Install proprietary adhesive according to [insert membrane manufacturer] latest printed instruction.

Special details may be required at perimeters and openings, consult membrane manufacturer.)

Nail headlaps [( ) mm] [( )" o/c] [staggered].

Lift overlaps and, using a proprietary torch, torch seal seams; take care not to ignite adhesive; ensure a full bond is achieved.

Loose-laid and ballasted: (This option is a special application and where offered as an alternative method the membrane manufacturer must approve the system and the application.)
Install membrane loosely over acceptable substrate; lap sides [( ) mm] [( )"] and ends [( ) mm] [( )"].

Lift overlaps and, using a proprietary torch, torch seal seams; ensure a full bond is achieved.

Cap Sheet: (two-ply membrane)
Start at low point and in same direction as base sheet.

Unroll and align membrane; stagger side laps and end laps minimum [( ) mm ( )"] from those in base sheet; cap sheet side laps [( ) mm] [( )"] and end laps [( ) mm] [( )"]; stagger end laps [( ) mm] [( )"].

Carry cap sheet to [top of cant] [base of wall / curb]. (See notes on base sheet, Clause 3.5.3)

Reroll approximately half the membrane into a firm roll.

Install cap sheet [in hot asphalt as outlined for base sheet, clauses 3.5.4.1 to 3.5.4.6] [torch-adhered as outlined for base sheet, clauses 3.5.5.1 to 3.5.5.7]. (Some membrane manufacturers permit hot asphalt applied cap sheets with torched seams as an option.)

Embed granules at end laps of torched cap sheets; use a torch to soften the bitumen and a heated trowel to push the granules into the bitumen; do not scrape granules away.

Membrane Flashings:
Base and cap membrane flashing details vary and should be consulted. For example, many membrane manufacturers require the base membrane flashing be installed prior to the roof membrane cap sheet, while some require both base and cap membrane flashing be applied after the roof membrane is complete. In all cases the manufacturer's details / requirements should be strictly adhered to.

Base membrane flashing:
Cut membrane in 1 m (39") wide, the roll width, by the length required to suit detail.

Extend membrane base flashing from minimum [( ) mm] [( )"] out onto roof [from toe of cant], to minimum [200 mm] [8"] above completed roof assembly surface.

Stagger side laps in membrane base flashing [minimum ( ) mm ( )"] from side and end laps in roof membrane [base] [cap] sheet.

Install membrane base flashing [in hot asphalt] [torch-adhered] and mechanically fasten according to membrane manufacturer's detail. (In most cases, torch-adhered flashing is preferred, consult membrane manufacturer.)

Bevel torched membrane base flashing edges and seams with a torch-heated trowel.

Cap membrane flashing:
Cut membrane in 1 m (39") wide, the roll width, by the length required to suit detail.

Extend membrane cap flashing from minimum [( ) mm] [( )"] out onto roof [from toe of cant], to minimum [200 m] [8"] above completed roof assembly surface. (Membrane manufacturer may require the membrane cap flashing carried to outside of wall / detail or inside of curbs / openings and then mechanically fastened.)

Stagger side laps in membrane cap flashing [( ) mm] [( )"] from side laps of membrane base flashing and from side and end laps of roof membrane cap sheet.

Install membrane cap flashing [in hot asphalt] [torch-adhered and mechanically-fastened] according to membrane manufacturer's details. (Torch-adhered usually preferred, consult membrane manufacturer.)

Press firmly into place using a damp cloth; remove air pockets.

Single-Ply Membrane:
Single-ply systems are offered by some SBS and APP modified membrane manufacturers. Consult membrane manufacturer and RGC Guarantee Standards for detailed installation instructions.

Gravel Surfacing:
Pour coat and gravel surfacing may be an alternative to mineral surfaced cap sheets, consult membrane manufacturer.

Embed 20 kg / meter squared (400 lb / square) gravel into a single pour of 3.0 kg / meter squared (60 lb / square) hot asphalt; ensure gravel completely covers asphalt.

Protected or Modified Protected Membrane Roof Assembly:
Loose lay CAN / ULC-S701-97 Type 4 extruded expanded polystyrene rigid insulation over completed membrane; butt boards tightly together.

Install filter fabric over insulation in shingle fashion, in direction of slopes, lapping 300 mm (12").

Install {[( ) kg / meter squared] [( ) lb / square] gravel ballast} [( ) x ( ) x ( ) mm thick pavers] over insulation. (The amount of ballast required varies according to insulation buoyancy (related to thickness) and wind uplift; refer to insulation manufacturer's latest printed recommendations for gravel rates.)
8 7. SBS Construction Details
The drawings contained within this section are intended to represent a variety of modified bituminous roof system designs while remaining generic with regards to manufacturers’ specific application specifications. They do not represent all possible manufacturer application roof system designs. Consult manufacturers’ specifications and RGC Guarantee Standards to develop a system acceptable to both the manufacturer and RGC.
For further information about flexible membrane system designs, see Section 2.1.3 Guarantee standards for Flexible Membrane Roofing Systems, Section 5 Flexible Membrane Roofing Systems and Section 8 Construction Details.
Modified Bituminous Membrane Construction Details
D1.7.1 Insulated Steel Deck: Generic Conventional Assembly
D1.7.2 Cant Edge
D1.7.3 Protected Membrane
D1.7.4 Curb Opening
D1.7.5 Clamping Copper Drain
D1.7.6 Two Part Cable Flashing
D1.7.7 Mechanical Curb Opening
D1.7.8 Pre-Curb Planter Wall
Construction DetailsD1.7.1D1.7.2D1.7.3D1.7.4D1.7.5D1.7.6D1.7.7D1.7.8

Click on any one of the tabs to the right to see details for each detailed application of SBS roofing

1 MODIFIED BITUMINOUS MEMBRANE:INSULATED STEEL DECK GENERIC CONVENTIONAL ASSEMBLY

1.1 WORK INCLUDED

(1) Gypsum Board

Required when insulation is too thin to span flutes of steel decking (see RGC Guarantee Standard A2.5) or when required as a thermal barrier by design authority.

(2) Vapor Retarder

If required by design authority.

(3) Insulation

Mechanically fastened. (See Section 2.2 for accepted materials and Section 2.1.1 RGC Guarantee Standards A4.3 and A4.4.2).

(4) Overlay Board

Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard C4.1)

(5) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification. Torching directly to wood surfaces is not permitted.

(6) Base Sheet Flashing

Adhered according to manufacturer’s specifications using cold adhesive, hot asphalt self-adhered or torch applied to cover boards, or mechanically attached membrane. Torching directly to wood surfaces is not permitted. Must be carried over to outside of parapet or minimum 200 mm (8") above finished roof surface. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(7) Cap Sheet

Applied according to manufacturer’s printed instructions, all options.

(8) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions to top of parapet or minimum 200 mm (8") above finished roof surface. All options.

(9) Metal Flashing

As required by RGC Guarantee Standards. (See RGC Guarantee Standard A6.9 and A6.10)

1.2 RELATED WORK BY OTHERS

(A) Acceptable Steel Deck

(B) Plywood Backing

Required on rough surfaces or where adhesive is asphalt. Must be primed.

(C) Wood Blocking

Sloped to roof where parapet is over 100 mm (4") in width. Must be primed.

(D) Primer

Prime wood substrate to receive self-adhesive base membrane stripping.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

1 MODIFIED BITUMINOUS MEMBRANE: CANT EDGE

File:D1.7.2.1.jpg
File:D1.7.2.2.jpg

1.1 WORK INCLUDED

(1) Vapor Retarder

If required by design authority.

(2) Insulation

Mechanically fastened where deck type permits. (See list of accepted materials in Section 2.2). (See Section 2.1.1 RGC Guarantee Standard A4.4

(3) Overlay Board

Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard C4.1)

(4) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification. Torching directly to wood surfaces is not permitted.

(5) Base Sheet Flashing

Adhered according to manufacturer’s specifications, using cold adhesive, hot asphalt self-adhered or torch applied to cover boards, or mechanically attached membrane. Must be carried over to outside of fascia. Torching directly to wood surfaces is not permitted. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(6) Cap Sheet

Applied according to manufacturer’s printed instructions and RGC Guarantee Standards.

(7) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions and RGC Guarantee Standards up to the top of cant.

(8) Metal Flashing

As required by RGC Guarantee Standards. (See RGC Guarantee Standard A6.9 and A6.10)

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

Smooth, dry and clean.

(B) Fascia

Optional.

(C) Wood Blocking

Equal to height of insulation and overlay board, primed wherever in contact with asphalt.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

1 MODIFIED BITUMINOUS MEMBRANE: PROTECTED MEMBRANE

1.1 WORK INCLUDED

(1) Base Sheet

Adhered to deck using asphalt, cold adhesive, self-adhered, torch applied membrane or loose laid according to manufacturer’s specification and to RGC Guarantee Standards.

(2) Base Sheet Flashing

Adhered according to manufacturer’s specifications using cold adhesive, self-adhered or torch applied to cover boards, or mechanically attached membrane. Torching directly to wood surfaces is not permitted. Must be carried over to outside of parapet or minimum 200 mm (8") above finished roof surface. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(3) Cap Sheet

Applied according to manufacturer’s printed instructions and RGC Guarantee Standards.

(4) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions and RGC Guarantee Standards to top of parapet or minimum 200 mm (8") above top of finished roof surface.

(5) Insulation

See list of accepted materials in Section 2.2.

(6) Filter Fabric

Metal base flashing required. (See RGC Guarantee Standard A6.9.1.2)

(7) Ballast

Gravel or concrete paving tiles. (See RGC Guarantee Standards Section 2.1.1, A5.2)

(8) Metal Flashing

As required by RGC Guarantee Standards. (See RGC Guarantee Standard A6.9 and A6.10)

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

Smooth, dry and clean concrete, coated with proprietary primer.

(B) Plywood Backing

Required on rough concrete or where stripping adhesion is asphalt. Must be primed.

(C) Wood Blocking

Sloped to roof where parapet is over 100 mm (4") in width.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

1 MODIFIED BITUMINOUS MEMBRANE: CURB OPENING

1.1 WORK INCLUDED

(1) Gypsum Board

Required when insulation is too thin to span flutes of steel decking (See RGC Guarantee Standard A2.5) or when required as thermal barrier by design authority.

(2) Vapor Retarder

If required by design authority.

(3) Insulation

Mechanically fastened. (See Section 2.2 for accepted materials). (See Section 2.1.1 RGC Guarantee Standard A4.4).

(4) Overlay Board

Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard C4.1)

(5) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification and to RGC Guarantee Standards. Torching directly to wood surfaces is not permitted.

(6) Base Sheet Flashing

Adhered according to manufacturer’s specifications, using cold adhesive, self-adhered, or torch applied to cover boards, or mechanically attached membrane. Torching directly to wood surfaces is not permitted. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(7) Cap Sheet

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.

(8) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards to top of curb.

(9) Metal Flashing

As required by RGC standards. (See RGC Guarantee Standard A6.9 and A6.10)

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

(B) Wood Blocking

Minimum 200 mm (8") in height. (See asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard A5.6.2) Cant is optional.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

1 MODIFIED BITUMINOUS MEMBRANE: CLAMPING COPPER DRAIN

1.1 WORK INCLUDED

(1) Gypsum Board

Required when insulation is too thin to span flutes of steel decking or as thermal barrier when specified by the design authority. (See RGC Guarantee Standard A2.5)

(2) Vapor Retarder

If required by design authority.

(3) Insulation

Mechanically fastened where possible. (See Section 2.2 for accepted materials and RGC Guarantee Standard A4.4).

(4) Overlay Board

Asphalt adhered or mechanically fastened. Two layers required over heat-sensitive insulation. (See RGC Guarantee Standard C4.1)

(5) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification and to RGC Guarantee Standards. Torching directly to wood surfaces is not permitted.

(6) Mastic

Compatible mastic accepted by the membrane manufacturer.

(7) Base Sheet Flashing

Adhered according to manufacturer’s specifications and to RGC Guarantee Standards.

(8) Cap Sheet

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck (B) Clamping Copper Drain: Primed and mechanically fastened. Installed in bed of compatible mastic.

NOTE

Refer to RGC Guarantee Standards for additional requirements.

Leader size is determined by design authority using the calculation found in the BC Building Code at Appendix P.7.4.10 and Sectionle 7.4.10.11 (Sectionle 7.4.10.10 for gutters) in conjunction with the 15 minute rainfall value from the National Building Code, Appendix C.

1 MODIFIED BITUMINOUS MEMBRANE: TWO PART CABLE FLASHING

1.1 WORK INCLUDED

(1) Gypsum Overlay Board

Required when insulation is too thin to span flutes of steel decking or as thermal barrier when specified by the design authority. (See RGC Guarantee Standard A2.5).

(2) Vapour Retarder

If required by design authority.

(3) Insulation

Mechanically fastened where possible. (See Section 2.2 for accepted materials and RGC Guarantee Standard A4.4).

(4) Insulation Overlay

As required. See RGC Guarantee Standard C4.1

(5) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification and to RGC Guarantee Standards. Torching directly to wood surfaces is not permitted.

(6) Mastic

Compatible with membrane

(7) Base Sheet Flashing

Adhered according to manufacturer’s specifications, using cold adhesive, self-adhered or torch applied. Must be carried up flashing and terminate under hood flange. Torching directly to wood surfaces is not permitted. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(8) Cap Sheet

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.

(9) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards. Must be carried up flashing and terminate under hood flange.

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

(B) Wood Blocking

(C) Two Piece Flashing

Assembled around protrusion, laid in bed of compatible mastic on top of base sheet. Mechanically fasten two componentstogether and fasten flange to wood blocking or deck.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

1 MODIFIED BITUMINOUS MEMBRANE: MECHANICAL CURB OPENING

1.1 WORK INCLUDED

(1) Gypsum Overlay Board

Required when insulation is too thin to span flutes of steel decking (See RGC Guarantee Standard A2.5) or when required as thermal barrier by design authority.

(2) Vapour Retarder

If required by design authority.

(3) Insulation

Mechanically fastened where possible. (See Section 2.2 for accepted materials and Guarantee Standard A4.4).

(4) Insulation Overlay

As required. See RGC Guarantee Standard C4.1

(5) Base Sheet

Adhered to overlay board using asphalt, cold adhesive, self-adhered, mechanical attachment or torch applied according to manufacturer’s specification. Torching directly to wood surfaces is not permitted.

(6) Base Sheet Flashing

Adhered according to manufacturer’s specifications, using cold adhesive, hot asphalt, self-adhered or torch applied to cover boards, or mechanically attached membrane. Must be tucked under metal flange and mechanically attached to nailing strip. (See RGC Guarantee Standards Section 2.1.1, A5.6, and Section 2.1.3, C8.5).

(7) Cap Sheet

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards.

(8) Cap Sheet Flashing

Applied according to manufacturer’s printed instructions and to RGC Guarantee Standards. Must be tucked under metal flange and mechanically attached to the nailing strip.

(9) Metal Base Flashing

Mechanically fasten, standing seam at corners. Full width base flashing optional on flexible membranes. Partial skirt flashing minimum 75 mm (3") required on mechanical curbs that require flashing under metal flange. (See Detail Section 8.3.5).

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

(B) Rigid Insulation

(C) Mechanical Curb

Minimum 200 mm (8") and maximum 300 mm (12") above finished roof surface.

NOTE

Some mechanical curbs are designed to allow membrane flashing to be carried up onto metal flange, as illustrated. Install according to manufacturers’ instructions.

Refer to RGC Guarantee Standards for additional requirements

1 MODIFIED BITUMINOUS MEMBRANE: PRE-CURB PLANTER WALL PROTECTED MEMBRANE ROOF ASSEMBLY

1.1 WORK INCLUDED

(1) Primer

Application method and coverage rate as approved by Primary Membrane Manufacturer.

(2) Primary Roof Membrane

Modified Bituminous base and cap sheet membranes installed as per manufacturer’s published application specifications.

(3) Pre-Curb (Start-Up Curb) Membrane Flashing

Modified Bituminous base and cap sheet membrane flashing installed as per manufacturer’s published application specifications.

(4) Proprietary liquid membrane flashing System

RGC accepted Liquid Membrane Flashing System(s) (Refer to RPM Section2.2, Section 5.2) or hot melt SBS modified bitumen. Install as per the Manufacturer’s published instructions.

(5) Inside

Planter Wall Membrane Flashing: Adhered according to manufacturer’s specifications using cold adhesive, self- adhered or torch applied membrane. Torching directly to wood surfaces is not permitted. Carry membrane flashing plies to reglet termination near top of planter wall (stagger membrane seal minimum 300mm (6”).

(6) Reglet

Metal Counter Flashing: As required by RGC Guarantee Standards. (See RGC Guarantee Standard A6.9)

(7) Plaza Deck Assembly

Extruded polystyrene insulation and filter mat over primary roof membranes. Concrete pavers placed above pre-curb membrane flashing height, on proprietary pedestals. Note: membrane flashing is not permitted above pre-curb membrane flashing on plaza deck side of planter walls.

1.2 RELATED WORK BY OTHERS

(A) Acceptable Deck

Concrete slab shown. Each planter area must have a drain through the roof deck.

(B) Pre- Curb

Minimum of 100mm (4”) in height above concrete deck, smooth dry and clean.

(C) Cast over Concrete Planter Wall

Form on top of membrane sealed Pre-curbs or Start-up curbs.

(D) Re-Bar

Placed a centre of Pre-curb.

(E) Reglet

Premanufactured purpose-made reglet cast in concrete wall or saw-cut.

(F) Alternate Termination

Horizontal Reglet alternative to premanufactured purpose-made reglet cast in concrete wall or saw-cut on vertical surface of inside planter walls.

NOTE: Refer to RGC Guarantee Standards for additional requirements.

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AC Foam III	•Polyisocyanurate core integrally laminated to a specially coated facer (ideal for self-adhered membranes).
AC Foam Supreme	•Polyisocyanurate core integrally laminated to a tri-laminate foil facer.

Long Term Thermal Resistance (LTTR):	RSI value = 1.06 / 25 mm (1") [R Value = 6.0 / 25mm (1")]
Foam Density	32 kg / cu.m (2.0 lb / cu ft.)
Compressive Strength	138 kpa (20 psi)
Uses	•AC Foam III: Do not use with hot applied membranes, i.e. coal tar or asphalt
Standards (AC Foam III)	Conforms to CAN / ULC S704-01 / CAN / CGSB 51.26-M86
	FM-Class 1, I-60, I-90
	UL C S-126
Standard Sizes	1.2 m x 1.2 m (48" x 48") for Asphalt or adhesive applied applications
	1.2 m x 2.4 m (48" x 96") for Mechanically fastened applications

Nominal Thickness inches (mm)	• 1.0 (25)
LTTR R-Value*	• 6.0
LTTR C-Value*	• 0.167
T-Load Quantity Sq. Ft. (Sq. M.)	• 32,384 (3,009)
Flute Span Ability, in. (mm)	• 2-5/8 (67)
Minimum Thickness, in (mm)	• 0.95 (24)

Property	Test Method	Specification Limits
Compressive Strength, psi (kPa)	ASTM D1621 Procedure A	Minimum 20 (138)
Moisture Vapour Transmission, perms	ASTM C355	Maximum 1.0
Foam core Density, lb / ft³ (kg / m³)	ASTM D1622	Nominal 2.0 (32)
Flame Spread (foam core)	ASTM E84	Maximum 25
Service Temperature, range if ºF (ºC)	- - -	-100 (-73) to 250 (121)

Long Term Thermal Resistance (LTTR):	RSI value = 1.06 / 25 mm (1") [R Value = 6.0 / 25mm (1")]
Standards	Factory Mutual (FM) approved for Class I insulated steel deck construction (tested to FM 4450 standard)
	Foamed plastic for built-up roof covering classified by Underwriters Laboratories of Canada (ULC) as to an external fire exposure only (per ULC S107)
	Foamed plastic classified by Underwriters Laboratories of Canada as roof deck construction material with resistance to internal fire exposure for use in Construction No. C8 (tested to CAN / ULC-S126M)
	Foamed plastic classified by Underwriters Laboratories of Canada for Fire Resistance Classification (tested to CAN / ULC-S101-M89). See ULC List of Equipment and Material Directory (Vol. III).
	Based on current UL, ULC and / or FM test data, Firestone Resista complies with the following model building codes when installed in accordance with UL, ULC and / or FM requirements: BOCA, ICBO, SBCCI, Metro-Dade 92-0930.02 and CAN/ULC- S704-01/ CAN / CGSB 51.26-M86.
	Resista is mold resistant as per ASTM D3273 standards.
Standard Sizes	1.2 m x 1.2 m (4' x 4')	1.2 m x 2.4 m (4' x 8')
	Thicknesses: 25.4 mm to 101.6 mm (1" to 4")

Long Term Thermal Resistance (LTTR):	RSI value = 1.05 / 25 mm (1") [R Value = 6.0 / 25 mm (1")]
Compressive Strength	140 kpa [20 lb / sq. in.]
Uses	All conventional single-ply, modified and built-up roofing systems
Standards	Conforms to CAN / ULC-S704-01 / CAN / CGSB 51.26-M86
	FM-Class 1, I-60, I-90
	CAN/ULC S-126, S-107
Standard Sizes	1.2 m x 1.2 m (4' x 4')	1.2 m x 2.4 m (4' x 8')
	Thicknesses of 25.4 mm to 104.1 mm (1" to 4.1")
The following meet CAN/ULC -S704-01:
Tensile Strength	35 kpa
Flexural Strength	(MD/XD) 607/479 kpa
Dimensional Stability	2.0%
Water Vapour Permeance	60ng / Pasm²
Water Absorption	3.5%
Service Temp.	Range: min: 40°C to max. 100°C

Thermal Resistance:	RSI value = 0.88 / 25 mm (1") [R Value = 5.1 / 25mm (1")]
Uses	All conventional modified and built-up roofing systems.
Standards	Manufactured to conform to CAN / ULC-S704-01 / CAN / CGSB 51.26-M86
	Factory Mutual (FM) 4450 Class 1 approval for insulated steel deck construction
	Underwriters Laboratories of Canada (ULC) listed as to an external fire exposure only. (ULC S107)
Standard Sizes	1.2 m x 1.2 m (48" x 48")	1.2 m x 2.4 m (48" x 96")
	Thicknesses: 38 mm to 102 mm (1.5" to 4.0")

Thermal Resistance:	RSI value = 0.93 / 25 mm (1") [R Value = 5.4 / 25mm (1")]
Uses	All conventional modified, built-up, single-ply membrane and metal panel roofing systems.
Standards	Manufactured to conform to CAN / ULC-S704-01/ CAN / CGSB 51.26-M86
	Factory Mutual (FM) 4450 Class 1 approval for insulated steel deck construction
Standard Sizes	1.2 m x 1.2 m (48" x 48")	1.2 m x 2.4 m (48" x 96")
	Thicknesses: 38 mm to 102 mm (1.5" to 4.0")

Thermal Resistance:	RSI value = 0.80 / 25 mm (1") [R Value = 4.66 / 25mm (1")]
Uses	Clay, slate or concrete roofing tile systems; wood shakes and metal panel roofing systems.
Standards	Manufactured to conform to CAN / ULC-S704-01 / CAN / CGSB 51.26-M86
	Factory Mutual (FM) 4450 Class 1 approval for insulated steel deck construction
Standard Sizes	1.2 m x 1.4 m (48" x 96")
	Thicknesses: 38 mm to 115 mm (1.5" to 4.5")

Thermal Resistance:	RSI value = 0.49 / 25 mm (1") [R Value = 2.86 / 25mm (1")]
Uses	Residential or commercial shingle applications.
Standards	Manufactured to conform to CAN/ULC-S704-01 / CAN / CGSB 51.26-M86
Standard Sizes	1.2 m x 1.4 m (48" x 96")
	Thicknesses: 56 mm to 132 mm (2.2" to 5.2")

Long Term Thermal Resistance (LTTR):	RSI Value=1.06/25mm (1") [R Value = 6.0/25mm (1")]
Compressive Strength:	Paratherm - 138kpa (20 lb psi)
	Paratherm K - 140 kpa (20lb psi)
Uses:	Paratherm - Do no use with hot applied membranes
	Paratherm K - 140 kpa (20 lb psi)
Standard Sizes:	1.2m x 1.2m (48" x 48") for asphalt or adhesive applications
	1.2m x 2.4m (48" x 96") for mechanically attached systems	Standards (Paratherm K):	Conforms to CAN/ULC-s704.01/CAN/CGSB 51.26-M86 FM Class 1, I-60, I-90, CAN/ULC S-126,S-107

Long Term Thermal Resistance (LTTR):	RSI value = 1.06 / 25 mm (1") [R Value = 6.0 / 25mm (1")]>
Foam Density:	32 kg / cu.m (2.0 lb / cu ft.)
Compressive Strength	138 kpa (20 psi)
Uses	Do not use with hot applied membranes, i.e. coal tar or asphalt
Standards	Conforms to CAN / ULC S704-01 / CAN/ CGSB 51.26-M86
	FM-Class 1, I-60, I-90
	UL C S-126
Standard Sizes	1.2 m x 1.2 m (48" x 48") for Asphalt or adhesive applied applications
	1.2 m x 2.4 m (48" x 96") for Mechanically fastened applications

BACK-NAILING REQUIREMENTS FOR SLOPED ROOFS
Cap Sheet	Attachment	Base Sheet	Attachment	< ½" (4.2%)	> ½" < 1" (4.2 - 8.3%)	>1" < " (8.3 - 16.7%)	>2" <3" (16.7 - 25%)
Gravel Surfaced BUR	Hot asphalt			NFR	NFR	Nailers 20" oc	Nailers 12" oc
Smooth Coated BUR	Hot asphalt			NFR	NFR	NFR	Nailers 20" oc
Any Applicable Smooth or Granule Firestone SBS Cap	Hot asphalt	Any Applicable Firestone Base Sheet	Hot Asphalt or Mechanically Attached	NFR	Nailers 32" oc	Nailers 32" oc	Nailers 16" oc
					Full Length Sheet	Full Length Sheet	% Length Sheet
Any Applicable Smooth or Granule Firestone Cap Sheet	Firestone Multi-Purpose MB Cold Adhesive	Any Applicable Firestone Base Sheet	Heat Fused, Hot Asphalt, Mechanically Attached or Firestone Multi-Purpose MB Cold Adhesive	NFR	NFR	NFR	Nailers 32" oc
							Full Length Sheet
Any Applicable Smooth or Granule Firestone Cap Sheet	Heat fused	Any Applicable Firestone Base Sheet	Self-Adhesive, Heat Fused, Hot Asphalt, Mechanically Attached or Firestone Multi-Purpose MB Cold Adhesive	NFR	NFR	NFR	Nailers 32" oc
							Full Length Sheet
Refer to Firestone MB-LS-9 for detailed back-nailing requirements.
NFR - No fastener required at this slope.

BASE SHEET AND INSULATION ATTACHMENT FOR PLYWOOD, OSB AND WOOD PLANK ROOF DECKS
Acceptable Fasteners for Insulation and Base Sheet Attachment		Acceptable Insulation Adhesives
Firestone Heavy Duty Firestone All Purpose Belted Fasteners	1" (25.4 mm) into or through deck	Firestone ISO SPRAY Firestone ISO FIX Firestone ISO Twin Pack

INSULATION ATTACHMENT FOR STEEL DECKS
Acceptable Insulation Fasteners		Acceptable Insulation Adhesives
Firestone Heavy Duty Firestone All Purpose Belted Fasteners	¾" (19 mm) through deck	Firestone ISO SPRAY Firestone ISO FIX Firestone ISO Twin Pack

Products	Sheet Thickness (mm)	Reinforcement Type	Mass (kg / m²)	Description


BASE SHEETS
SBS Base	2.2	Fibreglass	2.6	Base sheet for use in hot or cold 2-ply systems
SBS Poly Base	2.3	Polyester	2.7	Base sheet for use in hot or cold 2-ply systems
SBS Premium Base	2.3	Fibreglass Scrim	2.8	High tensile base sheet
SBS Poly Torch Base	3	Polyester	3.6	Torch applied base sheet for use in 2-ply systems
SBS Glass Torch Base	3	Fibreglass	3.5	Torch applied base sheets in 2 ply systems
BaseGard SA	1.5	Fibreglass	1.2	Heat activated, self-adhered base for 2-ply systems with a heat welded cap

GRANULE SURFACED CAP SHEETS
SBS Cap	3.8	Polyester	4.4	Cap sheet for use in hot or cold 2-ply systems
SBS FR Cap	3.8	Polyester	4.4	Cap sheet for use in hot or cold 2-ply systems
SBS Torch	3.8	Polyester	4.4	Torch applied cap sheet for use in 2-ply systems
SBS FR Torch	4.1	Polyester	4.4	Torch applied FR cap sheet for use in 2-ply systems
SBS Premium	4.1	Polyester	4.6	Premium cap sheet for use in hot or cold systems
SBS Premium FR	4.1	Polyester	4.6	Premium fire retardant cap for use in hot or cold
SBS Premium FR Torch	4.1	Polyester	4.7	Premium torch applied fire retardant cap sheet

SMOOTH SURACED CAP SHEETS
SBS Smooth	3.6	Polyester	2.1	Smooth surfaced SBS sheet for use as a cap, base or inter-ply sheet to be applied in hot asphalt or cold process adhesive

	NOMINAL	NOMINAL	REINFORCEMENT
PRODUCT	THICKNESS	WEIGHT	WEIGHT	DESCRIPTION
	mm	kg/m²	g/m²
Ruberoid® Mop (Smooth)	4	4.3	170	Hot mop or cold adhesive applied, smooth surface; both sides, membrane, for single or two ply systems.
Ruberoid® Mop (Granule)	4	4.46	170	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems
Ruberoid® Mop 170FR (Granule)	5	4.38	170	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems
Ruberoid® Mop Plus (Granule)	4	4.46	250	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems
Ruberoid® Mop FR (Granule)	4	4.48	250	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane for single or two ply systems.
Ruberoid® 20 (Smooth)	2.25	2.81	105	Hot mop or cold adhesive applied, smooth surface; both sides, membrane, for single or two ply systems.
Ruberoid® 30 (Granule)	3.81	4.19	95	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems.
Ruberoid® 30 FR (Granule)	3.66	4.17	105	Hot mop or cold adhesive applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems.
Ruberoid® Modified Base Sheet (Smooth)	2.65	2.91	95	Hot mop or cold adhesive applied, smooth surface; both sides, membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ (Smooth)	2.1	4.3	105	Torch applied, smooth surface; both sides, 25 membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ (Smooth)	4.17	4.69	215	Torch applied, smooth surface; both sides, membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ and (Granule)	4.09	4.41	215	Torch applied, smooth bottom mineral surfaced top membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ and 170FR (Granule)	3.94	4.61	215	Torch applied, smooth bottom mineral surfaced top membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ Plus (Granule)	4.39	5.07	265	Torch applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems.
Ruberoid® SBS Heat-Weld™ Plus FR (Granule)	4.39	4.88	265	Torch applied, smooth bottom and mineral surfaced top membrane, for single or two ply systems.
2.1 ACCESSORIES
Gafglas® #75 Base Sheet				Asphalt-saturated fibreglass base sheet.
Gafglas® #80 Ultima Base Sheet				Asphalt-saturated fibreglass base sheet.
Gafglas® Stratavent® Eliminator™ Nailable Base Sheet				Fiberglass reinforced, bottom side granule surfaced venting base sheet
Gafglas® Stratavent® Eliminator™ Perforated Base Sheet				Fiberglass reinforced, bottom side granule surfaced perforated venting base sheet
Gafglas® Ply IV				Asphalt-saturated fibreglass ply sheet.
Gafglas® FlexPly™ VI				Asphalt-saturated fibreglass ply sheet.
Mweld® Standard M Vent				Pre-flashed spun aluminum roof vent
Mweld® Adjustable M Vent				Pre-flashed two piece unit consisting of a spun aluminum base and a flexible EPDM upper boot
Mweld® One Way M Vent				Pre-flashed spun aluminum one way roof vent
Mweld® M Drain				Pre-flashed spun aluminum or copper roof drain with gravel guard, strainer cap and waterproofing plumbing seal attached.
Mweld® Pre-Flashed Lead Jack				Pre-flashed plumbing vent (lead jack)
Mweld® M Scupper				Pre-flashed 24 ga. Galvanized steel through-wall roof drain. Also available upon request, made from aluminum, copper, or stainless steel.
Mweld® M-Curb System				A structural urethane outer shell curb with a pourable urethane sealant that is used in place of conventional metal pitch pans.

Slope Limitation:	1:4 (3" in 12") Consult membrane manufacturer for installation at higher slopes
In-Service Performance:	Min.:	-10°C	(+14°F)
Temperature of the	Min.:	-18°C	(0°F)
Membrane:	Min.:	<-18°C	(0°F)
	Max.:	+50°C	(+122°F)

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Wood / plywood	Wood decks require a separation layer/base sheet. Prime concrete surfaces to be directly adhered with bituminous materials. Steel decks require overlay board sufficient to span the flutes.
	Concrete
	Steel
Separation Sheet	Gafglas® #75	Mechanically fasten over wood and nailable decks.
	Gafglas® #80 Ultima™
	Stratavent® Eliminator™ Nailable
Asphalt	Type III	Type III permitted on slopes up to 1:24 (1/2" in 12").
	Type IV	Type IV required on slopes over 1:24 (1/2" in 12").
SINGLE-PLY MEMBRANE:
Roof Membrane	Ruberoid® Mop Granule	Asphalt or adhesive applied, single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® Mop 170 FR
	Ruberoid® Mop Plus
	Ruberoid® Mop FR
	Ruberoid® 30
	Ruberoid® 30 FR	Torch applied (SBS Heat-Weld membranes only), single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® SBS Heat-Weld™ Granule

	Ruberoid® SBS Heat-Weld™ 170 FR
	Ruberoid® SBS Heat-Weld™ Plus
	Ruberoid® SBS Heat-Weld™ Plus FR
TWO-PLY MEMBRANE:
Base Sheet	Gafglas® #75	Asphalt or adhesive applied, single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Gafglas® #80 Ultima™
	Stratavent® Eliminator™ Nailable
	Stratavent® Eliminator™ Perforated	Torch applied (SBS Heat-Weld membranes only), single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® Mop Smooth
	Ruberoid® 20
	Ruberoid® SBS Heat- Weld™ 25
Ply Sheet (where required)	Gafglas® Ply IV	Asphalt or adhesive applied, single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
Ply Sheet (where required)	Gafglas® FlexPly™ VI
Cap Sheet	Ruberoid® Mop Granule	Asphalt or adhesive applied, single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® Mop 170 FR
	Ruberoid® Mop Plus
	Ruberoid® Mop FR
	Ruberoid® 30
	Ruberoid® 30 FR
	Ruberoid® SBS Heat-Weld™ Granule	Torch applied (SBS Heat-Weld membranes only), single ply membranes, over prepared substrate or over wood decks.
	Weld™ 170 FR
	Ruberoid® SBS Heat-Weld™ Plus
	Ruberoid® SBS Heat-Weld™ Plus FR
Surfacing (where required)	Gravel	Smooth surfaced cap sheet requires pour coat and gravel
Flashing Membrane	Ruberoid® Mop Granule	Asphalt or adhesive applied, single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® Mop 170 FR
	Ruberoid® Mop Plus
	Ruberoid® Mop FR
	Ruberoid® 30	Torch applied (SBS Heat-Weld membranes only), single ply membranes, over prepared substrate or over mechanically fastened separation sheet on steel or wood decks.
	Ruberoid® 30 FR
	Ruberoid® SBS Heat-Weld™ Granule
	Ruberoid® SBS Heat-Weld™ 170 FR
	Ruberoid® SBS Heat-Weld™ Plus
	Ruberoid® SBS Heat-Weld™ Plus FR
TWO-PLY SELF-ADHERING MEMBRANE:
Base Sheet	Liberty SBS SA Base Sheet	Self-Adhering base sheet applied over prepared substrate as a first ply of a two-ply system on steel or wood decks.
Cap Sheet	Liberty SBS SA Cap Sheet	Self-Adhering Cap sheet applied over Liberty SBS
	Liberty SBS SA FR Cap sheet	SA Base sheet as the second ply of a two-ply roof system on steel or wood decks.

Slope Limitation:	1:4 (3" in 12") Consult membrane manufacturer for installation at higher slopes.
In-Service Performance:	Min.:	-10°C	(+14°F)
Temperature of the	Min.:	-18°C	(0°F)
Membrane:	Min.:	<-18°C	(0°F)
	Max.:	+50°C	(+122°F)

PRODUCT	DESCRIPTION	APPLICATIONS
STRESSPLY® EUV SPF FR MINERAL	155 mil 4mm SBS and SIS (Styrene-Butadiene-Styrene and Styrene-Isoprene-Styrene) rubber modified membrane. It utilizes Kevlar fibers and a dual polyester and fiberglass combination reinforcement. The result is a highly reflective, high strength, puncture and fatigue resistant, rubber modified membrane, with a factory applied ENERGY STAR® rated coating. 1300 lbf (5783N) Tear Strength, -34°C Low Temperature Flexibility, Solar Reflectance Index (SRI) 86	Cold applied 2 or 3 ply system
STRESSPLY® PLUS SPF FR MINERAL	155 mil 4mm SBS and SIS (Styrene-Butadiene-Styrene and Styrene-Isoprene-Styrene) rubber modified membrane. It utilizes Kevlar fibers and a dual polyester and fiberglass combination reinforcement. The result is a highly reflective, high strength, puncture and fatigue resistant, rubber modified membrane, with a factory applied ENERGY STAR® rated coating. 500 lbf (2224N) Tear Strength, -34°C Low Temperature Flexibility, Reflectance 0.7 min Solar Reflectance Index (SRI) 86	Cold applied 2 or 3 ply system
STRESSPLY® IV PLUS SPF MINERAL	195 mil 5mm SBS (Styrene-Butadiene-Styrene) mineral surfaced rubber modified roofing membrane with a fiberglass and polyester composite scrim. with a factory applied ENERGY STAR® rated coating.. 510 lbf (2269N) Tear Strength, -40°C Low Temperature Flexibility, Solar Reflectance Index (SRI) 86	Heat Welded

MILLENNIUM®	120 mill Polyester/fiberglass-reinforced SBS (Styrene-Butadiene-Styrene) modified coal tar membrane. This membrane is design to be used with BK and Millennium base sheets. Excellent chemical resistance.	Hot and cold applied coal tar 2 or 3 ply system
MILLENNIUM® MINERAL	160 mill Polyester/fiberglass-reinforced SBS (Styrene-Butadiene-Styrene) coal tar membrane. This membrane is design to be used with BK and Millennium base sheets. Excellent chemical resistance.	Hot and cold applied coal tar 2 or 3 ply system
MILLENNIUM® FR MINERAL	180 mill Polyester/fiberglass-reinforced SBS (Styrene-Butadiene-Styrene) coal tar FR membrane. This membrane is design to be used with BK and Millennium base sheets. Excellent chemical resistance.	Hot and cold applied coal tar 2 or 3 ply system

HPR™ SA FR Base Sheet	SBS Modified self-adhering underlayment used in StressPly SA FR	Self Adhering
FLEXBASE® 80	80 mil 2mm base sheet, high strength, puncture and fatigue resistant rubber modified roofing base sheet designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of two layers of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with BiFlex Cap membrane. 300 lbf (1335N) Tear Strength, -34.4°C Low Temperature Flexibility, 23% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
FLEXBASE® 120	120 mil 3mm base sheet, high strength, puncture and fatigue resistant rubber modified roofing base sheet designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of two layers of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with BiFlex Cap membrane. 300 lbf (1335N) Tear Strength, -34.4°C Low Temperature Flexibility, 18% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
FLEXBASE® E 80	80 mil 2mm base sheet made up of Styrene-Butadiene-Styrene (SBS), these rubber modified base sheets utilize Kevlar fibers and a dual polyester and fiberglass combination reinforcement that offers the inherent strength and heat stability of fiberglass along with the ability of polyester to conform. For use with BiFlex Cap membrane. 900 lbf (4003N) Tear Strength, -34.4°C Low Temperature Flexibility, 23% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
FLEXBASE® E 120	120 mil 3mm base sheet made up of Styrene-Butadiene-Styrene (SBS), these rubber modified base sheets utilize Kevlar fibers and a dual polyester and fiberglass combination reinforcement that offers the inherent strength and heat stability of fiberglass along with the ability of polyester to conform. For use with BiFlex Cap membrane. 900 lbf (4003N) Tear Strength, -34.4°C Low Temperature Flexibility, 18% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
FLEXBASE® PLUS 80	80 mil 2mm base sheet, high strength, puncture and fatigue resistant rubber modified roofing base sheet designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of two layers of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with BiFlex Cap membrane. 500 lbf (2224N) Tear Strength, -34.4°C Low Temperature Flexibility, 23% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
FLEXBASE® PLUS 120	120 mil 3mm base sheet, high strength, puncture and fatigue resistant rubber modified roofing base sheet designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of two layers of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with BiFlex Cap membrane. 500 lbf (2224N) Tear Strength, -34.4°C Low Temperature Flexibility, 18% Recycled Content.	Hot Asphalt, SEBS Asphalt 2 ply system
STRESSBASE® 80	80 mil 2mm base sheet, high strength, puncture and fatigue resistant, rubber modified roofing membranes designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with StressPly membranes. 110 lbf (489N) Tear Strength, -28.8°C Low Temperature Flexibility, 20% Recycled Content.	Hot Asphalt, SEBS Asphalt, cold applied, 2 ply system
STRESSBASE® 120	120 mil 3mm base sheet, high strength, puncture and fatigue resistant, rubber modified roofing membranes designed for use as the waterproofing and reinforcement layer of a built-up or modified roofing system. It consists of fiberglass reinforcement sandwiched by Styrene-Butadiene-Styrene (SBS) rubber in a high penetration index asphalt mixture. For use with StressPly membranes. 110 lbf (489N) Tear Strength, -28.8°C Low Temperature Flexibility, 26% Recycled Content	Hot Asphalt, SEBS Asphalt, cold applied, 2 ply system

Silver-Shield®	Fibered Aluminum Roof Coating; fibered aluminum roof coating
Garla-Brite™	Non-Fibered Aluminum Paint; non-fibered aluminum paint having the following characteristics:
Pyramic™	White Elastomeric Roof Coating; Energy Star approved white acrylic roof coating:
Solex™	White, reflective, Kynar based roof coating, meets and exceeds all the requirements of CRRC, Energy Star® and Title 24 standards, and contributes to LEED® points.
WeatherScreen™	Asphalt Protective Roof Coating; heavy-bodied, fiber reinforced, cold process roof coating
Black•Stallion® Cold	Cold process polymer-modified coal tar topcoat
Weatherking®	High-grade, cold applied rubber modified topcoat for slopes up to 3:12 (25%)

Flashing Bond®	Cold-applied, fibered mastic used with reinforcing fabric
Garla-Flex®	High quality flexible elastomeric asphaltic mastic
Green-Lock ®Membrane Adhesive	Green-Lock Membrane Adhesive uses polymer technology that makes it 100% solids and solvent free. Being solvent free means there will be no adverse affects typically associated with traditional solvent based products such as odors, sheet softening, compound damage, solvent blisters, etc. It is also environmentally friendly due to containing zero VOCs.
HPR™ SA Modified Adhesive	Modified adhesive for StressPly SA FR mineral flashing laps and end flaps
Garla-Prime®	Quick-dry asphalt cut back primer
Green-Lock™ Adhesive	100% Solids, zero VOC, flashing adhesive for SBS sheets only
Weatherking®	High-grade, cold applied rubber modified topcoat for slopes up to 3:12 (25%)
Tuff-Stuff™	Moisture curing single-component non-sag polyurethane sealant
Seal-Rite®	Thermoplastic rubber sealant
Seal-Tite™	Two-part pourable urethane pitch pocket sealant

Category:5.0 Before Delete

Category:5.0 Before Delete

Contents

1 D1. SBS (New Version)

1.1 Sample of new RPM structure with classes of text)

1.1.1 NOTE: Content has been edited only minimally

2 1. Introduction

3 2. Definitions and Terminology

3.1 2.1 COMPOSITION

3.2 2.2 PERFORMANCE

4 3. RCABC (RoofStar) Guarantee Standards, Policies, Recommendations and Reference Materials for SBS Systems

4.1 USING THE TEXT SELECTION BUTTONS

4.2 3.1 MATERIALS

4.2.1 SUGGESTED REVISION:

4.3 3.2 GENERAL

4.3.1 3.2.1 Application

4.3.1.1 3.2.1.1 APPLICATION CAUTION

4.3.1.1.1 MODIFIED BITUMEN MEMBRANES IN HOT MOPPED ASPHALT

4.3.1.1.2 APP MODIFIED BITUMEN MEMBRANES

4.3.2 3.2.2 Roof Slope

4.3.2.1 SUGGESTED REVISION

4.3.3 3.2.3 Re-Roofing

4.3.4 3.2.4 Tying Into Existing Roofing

4.3.5 3.2.5 Wall Sheathing: Perimeter Requirements (EDITED for format and content)

4.3.5.1 GYPSUM SUBSTRATES

4.3.5.2 DECK SUPPORTED BY WALL

4.3.5.3 DECK NOT SUPPORTED BY WALL

4.3.6 3.2.6 Other

4.4 3.3 ROOF DECKS

4.4.1 3.3.1 Concrete Decks (EDITED for format and content)

4.4.2 3.3.2 Wood Decks

4.4.3 3.3.3 Separation Layers

4.4.4 3.3.4 Electrical Conduit

4.5 3.4 VAPOUR RETARDERS

4.6 3.5 INSULATION

4.6.1 3.5.1 General

4.6.2 3.5.2 Layering

4.6.3 3.5.3 Nailing Strips

4.6.4 3.5.4 Mechanical Fastening

4.6.5 3.5.5 Application to Steel Decks

4.6.6 3.5.6 Adhering Insulation

4.6.7 Polyisocyanurate Insulation

4.7 3.6 INSULATION COVERBOARD

4.7.1 3.6.1 General

4.7.2 3.6.2 Layering

4.7.3 3.6.3 Mechanical Fastening

4.7.4 3.6.4 Using Adhesives

4.7.5 3.6.5 Joint Taping

4.8 3.7 MEMBRANES

4.8.1 3.7.1 General

4.8.2 3.7.2 Mechanically Attached

4.8.3 3.7.3 Self-Adhesive

4.8.4 3.7.4 Cold-applied (Adhered)

4.8.5 3.7.5 Protected and Modified Protected Membranes

4.9 3.8 ROOFTOP GARDENS,PLANTERS & WALKWAYS

4.9.1 3.8.1 General

4.9.2 3.8.2 Root Barriers & Drainage

4.9.3 3.8.3 Planter Design & Waterproofing

4.9.4 3.8.4 Flood Testing

4.9.5 3.8.5 Overburdens

4.9.6 3.8.6 Walkways and Warning Zones

4.10 3.9 PERIMETER FLASHINGS: MEMBRANES

4.10.1 3.9.1 General

4.10.2 3.9.2 Cant Strips

4.10.3 3.9.3 Expansion and Control Joints

4.10.4 3.9.4 Door Openings

4.10.5 3.9.5 Built-in Membrane Gutters

4.11 3.10 PERIMETER FLASHINGS: METAL

4.11.1 3.10.1 General

4.11.2 3.10.2 Material Standards

4.11.3 3.10.3 Attachment

4.11.4 3.10.4 Curb Heights (Roof Openings)

4.11.5 3.10.5 Seams

4.11.6 3.10.6 Cap Flashings, Base Flashings and Reglets

4.11.7 3.10.7 Flashing on Stucco Walls

4.12 3.11 ROOF PENETRATIONS and DRAINS

4.12.1 3.11.1 General

4.12.2 3.11.2 Gum Pans (Pitch Pockets)

4.12.3 3.11.3 Strip-in Flashings

4.12.3.1 3.11.3.1 STRIP-IN FLASHINGS (lead, aluminium, stainless steel, copper, etc., flashed in with membrane material)

Product	Surfacing Top / Bottom	Nominal Thickness mm	Nominal Application Weight g/m²	Application
Cap Sheets:
Therm-a-ply
P180 GF	granules / film	4	180 Polyester	Torch
P180 GS	granules / sand	3.5	180 Polyester	Mop
P250 GF	granules / film	4.5	250 Polyester	Torch
G100 GF	granules / film	4	100 Fibreglass	Torch
G100 GS	granules / sand	3.5	100 Fibreglass	Mop
Polymax
180 GS	granules / sand	3	180 Polyester	Mop
Alumatac
P180 AF	Al. foil / film	3	180 Polyester	Torch
P180 AS	Al. foil / sand	3	180 Polyester	Mop
G100 AF	Al. foil / film	3	100 Fibreglass	Torch
G100 AS	Al. foil / sand	3	100 Fibreglass	Mop
Base Sheets:
Therm-a-ply
P180 FS	film / sand	2.2	180 Polyester	Torch / Mop
P180 SS	sand / sand	2.2	180 Polyester	Mop
G100 FS	film / sand	2.2	100 Fibreglass	Torch / Mop
G100 SS	sand / sand	2.2	100 Fibreglass	Mop
P180 FF	film / film	3	180 Polyester	Torch
G100 FF	film / film	3	100 Fibreglass	Torch
G100 FR	film / silicone	2.5	100 Fibreglass	Peel & Stick

ROOF ASSEMBLY
Modified Plus		Thickness (mm)
Membrane	Designation	(Note 1)	Reinforcement	Application

G100 p / p	Base	2.5	glass	torch
G100 p / s	Base	2	glass	mop / adhesive
G100 s / s	Base	2	glass	mop / adhesive
G100 Tack sheet	Base	2.2	glass	self adhesive
G100g M	Cap	3.2	glass	mop / adhesive
NP180 p / p	Base	3	polyester	torch
NP180 p / s	Base	2.2	polyester	mop / adhesive
NP180 s / s	Base	2.2	polyester	mop / adhesive
NP180 Tack	Base	3	polyester	self adhesive
NP180gM4	Cap	4	polyester	mop/ adhesive
NP180gT4	Cap	4	polyester	torch
NP180gT5	Cap	5	polyester	torch
NP250gM4	Cap	4	polyester	mop / adhesive
NP250gT4	Cap	4	polyester	torch
NP250gT5	Cap	5	polyester	torch

PRODUCT	NOMINAL THICKNESS (mm)	APPROX.WEIGHT (kg / m sq)	REINFORCING WEIGHT (g / m sq)	APPLICATION
Modiflex MF-95 CAP	3.5	4.1	95 fibreglass	Hot asphalt or Cold adhesive
Modiflex MF-95 CAP FR	3.5	4.1	95 fibreglass	Hot asphalt or Cold adhesive
Torchflex TF-95 CAP	3.5	4.3	95 fibreglass	Torch weld
Modiflex MP-180-CAP	3.5	4.25	180 polyester	Hot asphalt or Cold adhesive Torch weld or mechanically
Torchflex TP-180-CAP	4	4.82	180 polyester	Torch weld
Torchflex TP-180 CAP3.5	3.5	4.3	180 polyester	Torch weld
Torchflex TP-180 CAP 3.5 FR	3.5	4.3	180 polyester	Torch weld
Torchflex TP-180-CAP-45	4.5	5.39	180 polyester	Torch weld
Torchflex TP-180-CAP-50	5	5.42	180 polyester	Torch weld
IKO Jardin	4	4	250 polyester	Torch weld
Modiflex MP-250-CAP	4.5	4.88	250 polyester	Hot asphalt or Cold Adhesive Torch weld or mechanically attached
Armourbond 180	3	3.45	180 polyester	Self-adhering
Armourbond 95	2.5	4.7	95 fibreglass	Self-adhering
Armourvent Base	2.8	2.67	95 fibreglass	Self-adhering
Armourbond Flash	2	4.17	140 polyester	Self-adhering
Armourgard Ice and Water	1.5	-	-	Self-adhering vapour retardant.
Armourtread	5	-	95 fibreglass	Hot asphalt or Cold adhesive or Mechanically attached.
Fast-N-Stick-180 Base	2.5	4	180 polyester	Hot asphalt or Cold adhesive or Mechanically attached, self adhering laps
IKO Armourbridge / Pont	5.5	5.2	180 polyester	Torch weld
Modiflex MF-95-FS-BASE	2.2	3.17	95 fibreglass	Mechanically attached (uninsulated wood decks only) or Hot asphalt or Cold adhesive
Modiflex MF-95-SS-BASE	2.2	2.54	95 fibreglass	Hot asphalt or Cold adhesive or mechanically attached
Modiflex MP-180 SF	3.5	4.3	180 polyester	Torch weld
Modiflex MP-180 SS (3mm)	3	3.5	180 polyester	Mechanically attached (uninsulated wood decks only) or Hot asphalt or Cold adhesive.
Modiflex MP-180-FS-(3mm)	3	3.27	180 polyester	Hot asphalt or Cold adhesive or mechanically attached
Modiflex MP-180-FS-BASE	2.2	2.66	180 polyester	Hot asphalt or Cold adhesive or mechanically attached
Modiflex MP-180-SS-BASE	2.2	2.66	180 polyester	Mechanically attached (uninsulated wood decks only) or Hot asphalt or Cold adhesive
Torchflex TF-95 FF 2.2	2.2	3.17	95 fibreglass	Torch weld
Torchflex TF-95-FF-BASE	3	3.17	95 fibreglass	Torch weld
Torchflex TP-180-FF-BASE	3	3.45	180 polyester	Torch weld or mechanically attached
Torchflex TP-250 CAP 5	5	4.34	250 polyester	Torch weld or mechanically attached
Torchflex TP-250 CAP ALUM	4.2	4.3	250 polyester	Torch weld
Torchflex TP-250 FF	4	3.8	250 polyester	Torch weld or mechanically attached
Torchflex TP-250-CAP	4	4.76	250 polyester	Torch weld or mechanically attached
Torchflex TP-250-SF-BASE	4	4.53	250 polyester	Torch weld
Torchflex TP-250-SS (4mm)	4	4.1	250 polyester	Hot asphalt or Cold adhesive or Mechanically attached.
Prevent MP 180 Cap	3.5	3.99	180 polyester	Torch weld
Prevent TP 180 Cap	4	4.93	180 polyester	Torch weld
Prevent MP 250 Cap	4	4.44	250 polyester	Torch weld or mechanically attached
Prevent TP 250 Cap	4	4.72	250 polyester	Torch weld or mechanically attached
Prevent Premium MP 250 Cap	4	4.48	250 polyester	Torch weld or mechanically attached
Prevent Premium TP 250 Cap	4	4.72	250 polyester	Torch weld or mechanically attached

Slope Limitation:	NO LIMIT
In-Service Performance:	Min.:	-18°C	(+0°F)	}
Temperature of the	Min.:	-18°C	(0°F)		Required membrane tensile strength varies.
Membrane:	Min.:	<-18°C	(0°F)
	Max.:	+93°C	(+200°F)

PRODUCT	THICKNESS (mm)	FORCEMENT	WEIGHT (kg/m sq)	DESCRIPTION
Base Sheets
#603 Superbase™	1.9	NWFG	3.7	Mop or cold-process applied base sheets in a 2-ply (or more) system
#60S Panoply®	1.8	FGS	2.4
#1000 ESHAvent®	2	NWFG	1.9	Self-stick vented base sheet for mopped or torched systems. Used without fibreboard overlay on insulated systems.
Cap Sheets
#601	3	NWPG	5
#625 Paragon	3.1	NWFG	5	Mop, torch or cold-process applied cap sheets in 2-ply (or more) system.
#650 Panoply®	3.8	FGS	5.9
#917 3-way Cap	4.6	NWPG	7.8
#919 Smooth	4.1	NWPF	6.8
#1020 ESHAlum®	4	NWFG	4.9	Aluminum faced cap sheet, mop or torch applied.

		NOMINAL
	REINFORCEMENT	OVERALL	WEIGHT
PRODUCT	(NOTE 1)	THICKNESS (mm)	(kg/m sq)	APPLICATION
Sanded Base Sheets (sanded both sides)
Elastophene S	GF	2.2	2.7	Hot Asphalt
Elastophene 180 S	NWP	2.2	2.5	Hot Asphalt
Sopralene 180 S	NWP	3	3.5	Hot Asphalt/Torch Welded/Adhesive
Sopralene 250 S	NWP	4	5.2	Torch Welded/Adhesive
Mopped / Torch Welded Cap Sheets (granular top surface, sanded bottom surface)
Elastophene (FR) GR	GF	2.3	4.1	Hot Asphalt
Sopralene 180 (FR) GR	NWP	3.7	5	Hot Asphalt/Torch Welded/Adhesive
Sopralene 250 (FR) GR	NWP	4	4.8	Torch Welded/Adhesive
Torch Welded Base Sheets (Polypropylene Film Finished Both Sides)
Elastophene Flam	GF	2.2/3.0	2.9/3.8	Torch
Sopraflash	Composite	3	3.5	Torch Welded (5)
Sopralene Flam 180	NWP	3	3.6	Torch / Mechanically Fastened
Sopralene Flam 250	NWP	4	4.8	Torch / Mechanically Fastened
Sopraply Base 520	Composite	2.5	3.1	Torch Welded
Self-Adhesive Base & Base Stripping Sheets (Self-Adhesive Underface, Polyethylene Film Top Face)
Elastophene Flam Stick	WG	2.5	3.1	Self-Adhesive (4)
Sopraflash Flam Stick	GF	2.5	3.5	Self-Adhesive (4)
Sopralene Flam Stick	NWP + GG	3	3.7	Self-Adhesive (4)
Self-Adhesive Base & Base Stripping Sheets (Self-Adhesive Underface, Sanded Top Face)
Sopralene Stick Adhesive	NWP + GG	3	3.5	Self-Adhesive
Sopraflash Stick	GF	2.5	3.5	Self-Adhesive (4)
Torch Welded Cap Sheets (Polypropylene Film Underface)
Colvent Traffic Cap 860	Composite	4	4.5	Torch Welded
Colvent Traffic Cap FR 861	Composite	4	4.5	Torch Welded
Elastophene Flam (FR) GR	GF	2.5	4.4	Torch Welded
Soprafix Cap 650	GF	3.5	4.3	Torch Welded
Soprafix Cap FR 651	GF	3.5	4.3	Torch Welded
Soprafix Traffic Cap 660	Composite	4	4.5	Torch Welded
Soprafix Traffic Cap FR 661	Composite	4	4.5	Torch Welded
Sopralene Flam 180 (FR) GR	NWP	4	4.9	Torch Welded
Sopralene Flam 250 (FR) GR	NWP	4	4.8	Torch Welded
Sopralene Flam 350 (FR) GR	NWP	5	6.2	Torch Welded
Sopralene Flam Antirock	NWP	4.5	5.6	Torch Welded
Sopralene Mammouth (FR) GR	NWP	5	6.1	Torch Welded
Sopraply Cap 550	GF	3.5	4.3	Torch Welded
Sopraply Cap FR 551	GF	3.5	4.3	Torch Welded
Sopraply Traffic Cap 560	Composite	4	4.5	Torch Welded
Sopraply Traffic Cap FR 561	Composite	4	4.5	Torch Welded
SopraStar Flam HD GR	Composite	3.5	3.9	Torch Welded
Mechanically Fastened Cap Sheets (Polypropylene or Sanded Lap, Sanded Underface)
Soprafix Unilay 750	NWP	5	6.1	Torch Seam/Mechanically Fastened (5) (Insulated and uninsulated systems)
Soprafix Unilay 760	NWP	5	6.1	Adhesive Seam /Mechanically Fastened (5) (Insulated and uninsulated systems)
Laminate Base Sheets (Fire Retardant Fiberboard, Polypropylene Film Top Face)
Soprabase FR	GF	12	13.6	Hot Asphalt / Mechanically Fastened (4) or Adhesive
Soprabase 180 FR	NWP	12	13	Hot Asphalt / Mechanically Fastened (4) or Adhesive
Laminate Base Sheets (Non-combustible Mineral Wool, Polypropylene or Sanded Top, Self Adhesive/Heat Sealed Lap)
Xpress Board	NWP	12-125	5.3-25.4	Mechanically Fastened
Xpress EPS	NWP	37-115		Adhesive/Mechanically Fastened
Xpress ISO	NWP	37-115		Adhesive/Mechanically Fastened
PS Base Sheets (Sand Underface, Polypropylene Film Top Face)
Elastophene 180 PS	NWP	2.2	2.5	Hot Asphalt/Adhesive/Mech. Fasten
Elastophene 180 PS DG	NWP	2.2	2.5	Hot Asphalt/Adhesive/Mech. Fasten
Elastophene PS	GF	2.2	2.7	Hot Asphalt or Adhesive
Perimeter Membrane	GF	2.2	2.7	Hot Asphalt or Adhesive
Soprafix Base 610	Composite	2.5	3.1	Mechanically Fastened (5)
Soprafix Base 630	Composite	2.5	3.1	Mechanically Fastened (5)
Sopralene 180 PS	NWP	3	3.7	Hot Asphalt or Adhesive
Sopralene 180 SP 3.5	NWP	3.5	4.2	Torch Welded Exclusively
Sopraply Base 510	Composite	2.5	3.2	Hot Asphalt or Adhesive
Self Adhesive Base Sheets
Colphene 1500	HDPE	1.5	1.5	Self Adhesive (5)
Colvent 810	HDG	2.6	3	Self Adhesive (5)
Colvent 820	HDG	2.6	3	Self Adhesive (5)
Self Adhesive Cap Sheets
Colphene Granular	GM	3.4	4.3	Self Adhesive (5)
Colphene Granular HR	Composite	3.8	4.5	Self Adhesive (5)
Adhesive Applied Base and Cap Sheets
Colply Base 410	Composite	2.5	3.2	Adhesive (5)
Colply Cap 450	GF	3.5	4.3	Adhesive (5)
Colply Cap FR 451	GF	3.5	4.3	Adhesive (5)
Colply Traffic Cap 460	Composite	3.5	4.3	Adhesive (5)
Colply Traffic Cap FR 461	Composite	3.5	4.3	Adhesive (5)
Soprafix Base 620	Composite	2.5	3.1	Adhesive (5)
Soprafix Base 640	Composite	2.5	3.1	Adhesive (5) / Mech. Fastened
Soprafix Cap 670	GF	3.5	4.3	Adhesive (5)
Soprafix Cap FR 671	GF	3.5	4.3	Adhesive (5)
Soprafix Traffic Cap 680	Composite	3.5	4.3	Adhesive (5)
Soprafix Traffic Cap FR 681	Composite	3.5	4.3	Adhesive (5)
Foil-Faced Cap Sheets/Flashing Plies
Aerisol Flam	GF	N/A	1.5	Perforated Underlay
Associated Membrane Materials
Baral (Vapour Retarder)	Alu Foil	2	1.7	Hot Asphalt (see Note 3)
Lastobond 195	GF	1.6	1.7	Self-adhesive
Lastobond 240	GF	1.6	1.9	Self-adhesive
Lastobond Shield HT	GF	1	1.2	Self-adhesive
Lastobond Shield	GF	1	1.2	Self-adhesive
Lastoflex	GF	1.4	1.9	Mech. Fastened
Roofing Underlayment / Eave Protection / Metal Flashing Underlayment
Sopraglass 100	GF	1.5	1.6	Hot Asphalt (see Note 3)
Sopraglass 40	GF	1.2	0.9	Hot Asphalt (see Note 3)
Soprajoint	KP	4	6.1	Torch Welded
Sopralast 50 TV Alu	GF	4	4.4	Torch Welded
Sopralast TV Copper	GF	4	4.2	Torch Welded
Sopralene Flam 180 Cu & Al	NWP	3	4.6	Torch Welded
Sopraseal Stick 1100	N/A	1.1	1.2	Self-adhesive
Sopravap’r (Vapour Retarder)	HDPE	0.85	0.8	Self Adhesive
Accessories
Alsan Flashing				Microfab
Colply Adhesive (Brush / Trowel Grade)				Sopraboard
Coltack (insulation adhesive)				Soprafilter
Duotack (insulation adhesive)				Sopramat - Traffic Pad
Elastocol 350 Primer				Pitch Pocket Filler
Elastocol 500 Primer				Sopramastic
Elastocol 700 Primer				Sopramastic ALU
Elastocol Stick H2O Primer				Soprafix Plates
Elastocol Stick Primer				Sopradrain
Sopralap				Soprasphalte M

ROOF ASSEMBLY UNINSULATED
Components	Options	Comments or Cautions
Roof Deck	Plywood / Wood	Plywood must be minimum ½", fully supported, and in new or as new condition. Dimensional wood requires an overlay of plywood or asphalt board.
	Steel	Plywood must be mechanically secured for steel deck installation.
ROOF ASSEMBLY INSULATED
Roof Deck	Plywood / Wood	Prime surfaces to be directly adhered with bituminous materials. Steel decks may require a thermal barrier between the deck and combustible insulations.
	Concrete
	Steel
Thermal Barrier	Gypsum	Minimum 12.7 mm (1/2") may be required between steel deck and combustible insulations (See Building Code).
Vapour Retarder	Baral	Choice and use determined by local conditions.
	Elastophene Sanded
	Sopraglass 100
	Sopravap’r
	Sopraseal Stick 1100
	Lastobond Shield
	Lastobond Shield HT
Insulation	Sopraiso A	No overlay required.
	Expanded Polystyrene	Overlay (Asphalt Board or Plywood) mandatory
	Extruded Polystyrene	Overlay (Asphalt Board or Plywood) mandatory
	Polyisocyanurate	Overlay (Asphalt Board or Plywood) mandatory
Insulation Overlay	Asphalt Overlay Board	Exposed surface to receive membrane must be sanded or smooth asphalt and must be primed.
PROTECTED & MODIFIED PROTECTED MEMBRANE ASSEMBLY
Insulation	Extruded polystyrene (Type 4)	Loose-laid over roof membrane

	Concrete-topped extruded polystyrene (Type 4)	Loose-laid, no filter fabric and ballast required.

Filter Fabric	Soprafilter screen or	Loose-laid over insulation, prior to ballast installation.
	pre-approved alternative	Loose-laid over insulation, prior to ballast installation.
Ballast	Pavers on pedestals	Deck must be capable of withstanding loads.
	Gravel	Gravel minimum 16 mm (5/8") to a maximum 35 mm (1-3/8") diameter. Install according to insulation manufacturer’s recommended application rate for the specified insulation thickness.
TWO-PLY MEMBRANE
Base Sheet	Colphene 1500	Self-adhered to approved substrates. All surfaces to receive base membrane must be primed.
Cap Sheet	Colphene HR Granular	Composite reinforced self-adhesive cap sheet for heavy duty, high traffic areas.
		Embed all end laps of granular cap in Colply Trowel Grade Adhesive. Allow for 1" heat welded outside edge of overlap.
		Membrane requires rolling immediately after application with specific attention paid to laps.
Flashing Membranes	Base Ply	Colphene 1500
	Cap Ply	Colphene HR Granular
Primers	Elastocol Stick	Required for all substrates to receive base sheet and for use on side laps of granular cap sheets.
Mastic / Adhesives	Sopramastic	Compatible with SBS modified membranes.
	Sopramastic Alu
	Colply Adhesive Brush / Trowel Grade

	Coltack/Duotack
	Alsan Flashing
Walkways	Colphene HR Granular	Heavy duty self-adhesive cap sheet embedded in a coat of Colply Trowel Grade adhesive.
	Sopramat	Apply over loose isolation membrane cap sheet or bonded with recommended adhesive over fully welded isolation membrane cap.