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ARCHIVED - SBS Guide Specification

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1 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 [ ]

  1. PART 1 - GENERAL
    1. Work Included: (this clause is optional and, if using, ensure description of work is complete.)
    2. Related Work: (reference appropriate sections and ensure list is complete) eg:
      1. Section 06100 Rough Carpentry (Cants, Blocking, etc.)
      2. Section 07311 Asphalt Shingles
      3. Section 07600 Flashing and Sheet Metal
      4. Section 15440 Plumbing (Supply of Roof Drains)
    3. Quality Assurance:
      1. Workmanship Standards:
        1. 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.
        2. The owner or the owner's representative should identify applicable code and insurance requirements relating to the roof assembly.
      2. Qualification of Workers: Employ skilled applicators approved by membrane manufacturer.
      3. Independent Inspection: (Preferred Wording)
        1. Perform using an independent inspection company acceptable to RGC, [the owner, and the consultant] namely: _______________ (name of Inspection Company).
        2. Perform as required by RGC under the five (5) or ten (10) year Guarantee Program.
        3. Inspection costs for the Guarantee will be paid for directly by owner, and are not included in this contract.
      4. Independent Inspection: (Optional Wording)
        1. Perform using an independent inspection company acceptable to RGC, [the owner, and the consultant] to be assigned by RGC.
        2. Perform as required by RGC under the five (5) or ten (10) year Guarantee Program.
        3. Inspection costs for this Guarantee are included in this contract.
    4. Submittals:
      1. 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.)
      2. 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.
      3. List other submittal requests here, eg: shop drawings, samples, product literature, etc.
    5. Product Delivery, Storage, and Handling:
      1. Deliver and store materials in original containers with manufacturer's labels and seals intact.
      2. Store materials elevated from contact with ground and moisture and protected from weather.
      3. Store membrane rolls on end, one pallet high, selvage edge up; do not store in a leaning position.
      4. 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.
      5. Avoid prolonged exposure of light and heat sensitive materials to sunlight.
      6. Store combustible materials away from heat and open flame.
      7. Consult the manufacturer's material safety data sheets for materials on this project.
    6. Guarantee:
      1. Provide the standard Roofing Contractors Association of British Columbia (RGC) five (5) or ten (10) year Guarantee.
  2. PART 2 - PRODUCTS
    1. Roofing Materials:
      1. 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.
      2. 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.)
      3. Use only components supplied or accepted by membrane manufacturer.
      4. 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.
      5. 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.
      6. Vapour Retarder: (the selection of, and the requirement for, the vapour retarder is determined by the design authority.) or [as recommended by membrane manufacturer]
      7. Base / Separation Sheets: proprietary sheets approved by membrane manufacturer.
      8. Asphalt: oxidized roofing asphalt conforming to [CSA A123.4-M1979, Type 3 (steep)] [ASTM D312-78, Type IV (special steep)].
      9. 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
      10. Filter Fabric: 100% woven polyolefin; proprietary alternatives approved by membrane / insulation manufacturer.
      11. 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.
      12. Gravel Ballast: (for Protected Membrane and Modified Protected Membrane Roof Assemblies); clean, washed, round or crushed stone; gradations according to RGC Guarantee Standards.
      13. Membrane Fasteners: (proprietary type approved by membrane manufacturer).
      14. Termination Bars: (proprietary type approved by membrane manufacturer).
      15. Insulation Fasteners: [( ) mm] [( )"]; {screws and [plastic] [steel] stress plates} [RGC accepted nails (over wood decks only)].
      16. Membrane Accessories: (List membrane manufacturer's proprietary accessories here. For Example: adhesives; sealants / mastics; prefabricated flashings; walkway pads; coatings, etc.)
    2. Roof Insulation:
      1. 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}.
      2. 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}.
      3. 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}.
      4. 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 ( )].
      5. 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 ( )].
      6. Fibreboard: conform to CAN / CSA-A247-M86, Type 1; [shiplapped] [square] edges; ( ) mm [( )"] thick; [RSI ( )] [R ( )].
      7. Perlitic: conform to CAN / CGSB 51.10-92 ( ) mm [( )] thick [RSI ( )] [R ( )].
    3. Roof Membrane:
      1. 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].
      2. 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].
      3. 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.)
  3. PART 3 - EXECUTION
    1. Preparation:
      1. Ensure membrane substrate is rigid, dry, smooth, compatible, free of fins and sharp edges, and clean of all debris and foreign matter.
      2. 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).
      3. Install a [mechanically fastened] base ply to membrane manufacturer's specification [over wood board deck] [where required].
      4. Satisfy the membrane manufacturer's specifications for substrate preparation prior to membrane application.
      5. A thermal barrier may be required between the roof deck and some insulations. Building code and insurance requirements to be identified by design authority.
    2. Primer:
      1. Prime wood, concrete, and metal surfaces to be directly adhered with bituminous membranes; allow to dry.
      2. Consult membrane manufacturer for specific requirements.
    3. Vapour Retarder:
      The design authority determines the necessity for and the placement of the vapour retarder.
    4. Insulation: (under membrane)
      1. Install insulation in moderate contact (without forcing); stagger end joints; provide a smooth surface to accept roof membrane.
      2. Install insulation according to RGC Guarantee Standards over nailable decks.
      3. Embed insulation in 1.5 kg / m² (30 lb / square) mopping of hot asphalt over non-nailable deck.
      4. Install tapered insulation according to insulation manufacturer's shop drawings.
      5. Install only as much insulation as can be covered with roof membrane on the same day.
      6. 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.)
      7. 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.
    5. Base Sheet: (two-ply membrane)
      1. 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.)
      2. Unroll and align membrane; lap sides [( ) mm] [( )"] and ends [( ) mm ][( )"]; stagger end laps [( ) mm] [( )"].
      3. 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.)
      4. Asphalt-adhered:
        1. Reroll approximately half the membrane into a firm roll.
        2. Embed membrane in [( ) kg / m²] [( ) lb / square] hot asphalt; minimum asphalt application temperature +205°C (+400°F) at the roll.
        3. Limit mopping distance to 1 m (3') ahead of unrolling membrane to ensure proper asphalt application temperature is maintained.
        4. Apply even pressure on membrane as it is unrolled; do not “kick the roll out”; a visible “wave” of asphalt must precede the roll.
        5. Reroll opposite end and repeat process.
        6. Mechanically fasten head laps. (Consult membrane manufacturer for specific recommendations on slopes over 1:24 (1/2" in 12") ).
      5. Torch-adhered: (modified membranes only)
        1. Reroll approximately half the membrane into a firm roll.
        2. Direct propane torch along underside of roll, melting the surface modified bitumen; preheat seam of previous roll concurrently.
        3. Unroll membrane as modified bitumen melts.
        4. 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.
        5. Bevel “T” joints at roll ends and repair “fishmouths” using a torch-heated trowel.
        6. Reroll opposite end and repeat process.
        7. Mechanically fasten head laps. (According to membrane manufacturer's recommendations.)
      6. 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.)
        1. Install proprietary adhesive according to [insert membrane manufacturer] latest printed instruction.
        2. Special details may be required at perimeters and openings, consult membrane manufacturer.)
        3. Nail headlaps [( ) mm] [( )" o/c] [staggered].
        4. Lift overlaps and, using a proprietary torch, torch seal seams; take care not to ignite adhesive; ensure a full bond is achieved.
      7. 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.)
        1. Install membrane loosely over acceptable substrate; lap sides [( ) mm] [( )"] and ends [( ) mm] [( )"].
        2. Lift overlaps and, using a proprietary torch, torch seal seams; ensure a full bond is achieved.
    6. Cap Sheet: (two-ply membrane)
      1. Start at low point and in same direction as base sheet.
      2. 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] [( )"].
      3. Carry cap sheet to [top of cant] [base of wall / curb]. (See notes on base sheet, Clause 3.5.3)
      4. Reroll approximately half the membrane into a firm roll.
      5. 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.)
      6. 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.
    7. 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.
      1. Base membrane flashing:
        1. Cut membrane in 1 m (39") wide, the roll width, by the length required to suit detail.
        2. Extend membrane base flashing from minimum [( ) mm] [( )"] out onto roof [from toe of cant], to minimum [200 mm] [8"] above completed roof assembly surface.
        3. Stagger side laps in membrane base flashing [minimum ( ) mm ( )"] from side and end laps in roof membrane [base] [cap] sheet.
        4. 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.)
        5. Bevel torched membrane base flashing edges and seams with a torch-heated trowel.
      2. Cap membrane flashing:
        1. Cut membrane in 1 m (39") wide, the roll width, by the length required to suit detail.
        2. 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.)
        3. 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.
        4. 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.)
        5. Press firmly into place using a damp cloth; remove air pockets.
    8. 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.
    9. Gravel Surfacing:
      Pour coat and gravel surfacing may be an alternative to mineral surfaced cap sheets, consult membrane manufacturer.
      1. 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.
    10. Protected or Modified Protected Membrane Roof Assembly:
      1. Loose lay CAN / ULC-S701-97 Type 4 extruded expanded polystyrene rigid insulation over completed membrane; butt boards tightly together.
      2. Install filter fabric over insulation in shingle fashion, in direction of slopes, lapping 300 mm (12").
      3. 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.)

2 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

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

D1.7.1.jpg

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

D1.7.2.jpg

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

D1.7.4.jpg

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

D1.7.5.jpg

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

D1.7.6.jpg

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

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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

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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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