Firestone EPDM Membrane Installation Guidelines

Notice to the Reader: The instructions provided below are reprinted from the manufacturer's own materials which were submitted to the RoofStar Guarantee Program for inclusion in this Manual. The reader is urged to check these against current publications issued by the manufacturer, to ensure accuracy.

Manufacturer: FIRESTONE BUILDING PRODUCTS CANADA

Contact Address: See Membership List in Section 1.

Distributor: STEELS INDUSTRIAL PRODUCTS, PRO-LINE CONSTRUCTION MATERIALS

Product Group: EPDM SINGLE PLY MEMBRANE

Country of Origin: U.S.A.

Country of Manufacture: U.S.A.

Year First Installed

B.C.: 1987

Canada: 1984

U.S.A.: 1980

1 Description

The main component of the roofing system is the Firestone RubberGard Membrane, a tough flexible EPDM (Ethylene Propylene Diene Terpolymer) based sheet, which is fully vulcanized to provide excellent dimensional stability and weathering resistance.

Firestone RubberGard Membrane is compounded from the highest quality EPDM, carbon black, processing oils, and curing agents blended in a proprietary combination in state-of-the-art mixing equipment, calendered on one of the largest calenders in North America, and cured to form the base membrane. Large panels are fabricated prior to the vulcanization process to create factory seams, which are stronger than the surrounding material.

On the job site, the large panels reduce the amount of seaming which needs to be done. Seaming, which is needed between panels is done using a “Quickseam” splice tape.

1.1 GENERAL

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.

RANGE OF APPLICATIONS

.1 Firestone RubberGard Systems are for use over all types of roof decks in commercial, institutional, industrial, or low-slope flat roof applications. Acceptable decks by system do vary, as noted in each application description.

.2 As a loosely-laid roofing membrane, the membrane is laid over acceptable substrate, then gravel ballast is applied over the membrane.

.3 As a fully-adhered or mechanically-attached roof membrane system, no ballast is used because the membrane is held in place by the use of adhesives or mechanical anchors. These systems are used on facilities which have an unusual roof configuration such as domes or barrels, or where the structure cannot carry the load of a ballasted system.

.4 As recover systems, Firestone RubberGard Membrane Systems can be used for recover or full replacement applications.

DELIVERY, STORAGE, HANDLING, PROTECTION

.1 Deliver and store materials in undamaged, original containers with manufacturer's labels and seals intact.

.2 Store membrane rolls flat; they can be stacked without damage. Store solvent-based adhesives and sealants in accordance with local requirements for storage of flammable materials.

.3 Protect water-based PC-100 Acrylic Coating and water-based Bonding Adhesive from frost and freezing.

.4 Provide adequate protection for roofing materials from damage due to weather, traffic, or other causes.

SITE CONDITIONS

.1 Slope limitations:

• minimum slope: dead flat
• maximum slope (adhered): vertical
• maximum slope (ballasted or mechanically-fastened): 1:6 (2" in 12")

.2 Application temperatures: (temperatures limited by handling of materials, particularly adhesives; special application techniques are needed outside this range):

• minimum ambient temperature +4.4°C (+40°F)
• maximum ambient temperature +40°C (+104°F)

.3 Chemical incompatibilities:

.1 EPDM membranes are not resistant to oils and greases deposited onto the roof from restaurant exhaust fans, or from oils leaking from HVAC equipment.

.2 Areas of the roof, which are subject to contamination by oils and greases, should be protected by using metal catch pans and neoprene flashing.

.3 Membrane should not be applied in direct contact with coal tar pitch, Type 1 or Type 2 asphalts, or asphalt that is less than 30 days old.

.4 In the case of pitch and low melt asphalt physical separation, the use of 12.5 mm (1/2") fibreboard is adequate.

STANDARDS AND APPROVALS

.1 Canadian General Standards Board: CGSB 37-GP-52M

.2 Underwriters Laboratories of Canada: Classified #CR 1615

.3 Underwriter Laboratories: Listed

.4 Factory Mutual: Approved Class 1-60 and Class 1-90

.5 Other: ICBO, SBCC1, Dade Co., City of New York

MANUFACTURER'S SERVICES

.1 Technical Service: provided to the roofing contractor through in-house and on-the-roof training. Technical personnel are also available by phone to answer questions that arise throughout the job.

.2 Specifications / Details: available to provide complete information on system design and installation. Sweet's and Hutton's both provide basic specifications for systems, along with several common details for quick reference.

1.2 MATERIALS

NOTE: Regardless of the materials listed below or anywhere else in these manufacturer's guidelines, only materials accepted for use in the RoofStar Guarantee Program, or accessories associated with those materials, may be used to qualify for a RoofStar Guarantee. To see a list of the manufacturer's products accepted for use in the RoofStar Guarantee Program, click on the link above.

ROOF MEMBRANE

All Firestone membranes meet the requirements of the current standard for EPDM, CGSB 37-GP-52M. Firestone offers three thicknesses of membrane in two levels of flame resistance. Fire-rated membranes labelled RubberGard FR offer the UL and ULC ratings over polyisocyanurate foams and other popular roofing insulations, in non-ballasted applications. Standard membrane can be used for low slope exposed systems and under ballast to obtain fire ratings. All RubberGard membranes are black in colour.

Membrane	Thickness	Application	Weight	Size
RubberGard	1.2 mm	Ballasted, Adhered	1.37 kg/m2	3 m x 15.2 m up to 15.2 m x 61 m
	(.045")	Mechanically-Attached
RubberGard	1.6 mm	Adhered (to 1:48 -	2.10 kg/m2	3 m x 15.3 m up to 3 m x 30.5 m
	(.060")	1/4" in 12")
		Mechanically-Attached
		Ballasted (high performance)
FR Membrane	1.2 mm	Mechanically-Attached	1.57 kg/m2	3 m x 15.2 m up to 6 m x 30.5 m
	(.045")	Adhered (up to 1:12 -
		1" in 12" slope)
FR membrane	1.6 mm	Adhered (up to 1:12 -	2.41 kg/m2	3 m x 15.2 m up to 6 m x 30.5 m
	(.060")	1" in 12" slope)
		Mechanically-Attached
RubberGard	2.3 mm	Adhered Only	3.12 kg/m2	3 m x 30 m Platinum (.090")
RubberGard	1.6 mm	Adhered (to 1:12 -	2.41kg/m2	3 m x 15.3 m up to 3 m x 30.5 m
Eco White	(.060")	1" in 12")
		Mechanically-Attached

ACCESSORIES

.1 Adhesives and Sealants:

BA-2004 Bonding Adhesive

• Used to bond membrane and flashing to a variety of substrates and insulations.

Water-Based Bonding Adhesive

• Used to bond membrane and flashing to a variety of substrates and insulations.

LVOC Bonding Adhesive

• Used to bond membrane and flashing to a variety of substrates and insulations.

Lap Sealant HS

• Applied to the edge of QuickSeam accessories when cut and above termination bar. Colour is black.

FillGard Pourable Sealer

• Used to fill pockets around penetrations, which are of shapes that would prohibit normal flashing.

S-20 Water Block Seal

• Used as a compression gasket behind membrane at termination bar details and under membrane at drain clamping rings. Colour is grey.

.2 Mechanical Accessories:

Metal Batten Bars

• 25 mm x 3 m (1" x 9'10") Galvalume batten used for mechanical anchoring. Also available in coil 67m (220') long.

Polymer Batten Bars

• 19 mm x 76 m (¾" x 250') polymer batten used for mechanical anchoring.

V-plate

• 57 mm (2-¼") diameter steel plate with Galvalume coating. To be used with reinforced EPDM membrane and accessories such as QuickSeam Perimeter Fastening Strip and RMA strip.

.3 Associated Accessories:

Protective Fabric Mat

• Non-woven polypropylene used as a protective course when using crushed rock ballast.

Firestone Termination Bar

• Extruded aluminum bar used to terminate the membrane on parapet walls.

PC-100 Acrylic Coating

• Acrylic top coating available in three standard colours; grey, tan and white.

.4 QuickSeam Products:

QuickPrime Plus

• Required for cleaning areas receiving QuickSeam products.

QuickSeam Splice Tape

• For splicing of membrane panels. Available in 76 mm (3"), 152 mm (6") and 178 mm (7") for different roofing systems.

QuickSeam FormFlash

• An uncured EPDM/ Butyl tape flashing sheet which is black in colour. It is used to flash round penetrations, scuppers, inside and outside corners, or other roof top discontinuities on which RubberGard membrane cannot be used because of the irregularity in shape.

QuickSeam Corner Flashing

• 216 mm (8 ½") diameter semi-cured EPDM/Butyl tape used to flash inside and outside corner.

QuickSeam Joint Cover

• 76 mm (3") diameter semi-cured EPDM/Butyl tape used to cover T-joint.

QuickSeam RPFS

• Reinforced Perimeter Fastening Strip 152 mm (6") wide with 76 mm (3") wide Tape laminated along one edge used for non-penetrating flashings.

QuickSeam RMA

• Reinforced Mechanically Attached Strip 254 mm (10") wide with two 76 mm (3") wide strips of Tape laminated along both edges used as a non-penetration membrane securement.

QuickSeam Walkway pads

• Moulded rubber pads used to provide a walk surface over the EPDM membrane.

QuickSeam Pipe Boots

• Moulded EPDM pipe flashings used to speed installation of pipe flashings on the roof.

QuickSeam Flashing

• 5" wide semi-cured EPDM/Butyl tape laminate, used to seal metal edges in all systems.

QuickSeam Batten Cover

• 150 mm x 30.5 m (6" x 100') 1.6 mm (.060") EPDM / Butyl tape Cover Strips laminate, used to cover batten bars for mechanically-anchored systems.

QuickSeam Curb Flashing

• 450 mm (18") cured EPDM membrane with 76 mm (3") wide Tape laminated along one edge used to flash skylights, HVAC units and wall flashing.

QuickSeam SA Flashing

• 450 mm (18") cured EPDM membrane with Tape on its entire with used to flash skylights, HVAC units and wall flashing or make repair. Bonding adhesive is not required.

1.3 EXECUTION

PREPARATION

.1 Ensure surfaces are clean, dry, smooth, and free of sharp edges, fins, loose or foreign materials, oil, grease, and other materials, which may damage the membrane.

.2 Ensure deck penetrations are installed prior to installing membrane.

.3 Ensure parapet substrates are suitable for adhering membrane flashings; where sheathing is required plywood is preferred, minimum exterior grade gypsum board (conforming to CSA A82.27-M1977) is required.

MEMBRANE APPLICATION

.1 Start at the high point of the roof, working with the slope towards the lowest point to avoid water back-up; lap upper sheets over subsequent sheets.

.2 Position membrane and allow to relax a minimum of thirty minutes.

Fully-adhered:

.1 Fold membrane back evenly onto itself to expose underside; ensure the sheet lays smooth and without wrinkles.

.2 Clean mating surface of membrane by wiping or brushing to remove excessive talc or contaminants.

.3 Apply bonding adhesive evenly, avoiding globs, to both the exposed underside of the sheet and the substrate simultaneously; use a standard 225 mm (9") solvent-resistant paint roller. DO NOT APPLY TO SPLICE AREA.

.4 Allow bonding adhesive to dry until tacky but not sticky or stringy at the touch of a clean, dry finger.

.5 Roll coated sheet of membrane onto coated substrate slowly and evenly with no wrinkles; press mating surfaces together with a stiff push broom to ensure proper contact.

.6 Repeat procedures 3.2.3.1 to 3.2.3.5 for the remaining half of the membrane.

.7 Follow procedures outlined in 3.3 for seaming and 3.4 for flashing.

Ballasted:

.1 Loose lay membrane over substrate.

.2 Follow procedures outlined in 3.3 for seaming and 3.4 for flashing.

.3 Install river washed gravel ASTM No.4 (D448 using C136 test method) at a rate adequate to provide proper protection against wind uplift; minimum 50 kg/meters squared (10 lb/sq ft).

.4 Alternatively: install concrete pavers (minimum 2' x 2' x 2") over protection mat as membrane ballast.

.Mechanically anchored:

.1 Install Firestone batten strips or QuickSeam RMA strips in the pattern designated by Firestone for that building category; Attachments layout must be submitted to Firestone's Technical Services Department for approval 14 days prior to job start.

.2 Secure batten strips or plates (reinforced membrane or RMA strip only) using Firestone fasteners for the particular deck type; consult Firestone for recommendations.

.3 Space fasteners starting at 25 mm (1") from the end of the batten. Place fasteners every 150 mm (6") or 300 mm (12") o/c depending on the layout plan.

.4 Install Firestone 150 mm (6") Quickseam Batten Cover Strips over each batten strip; centre over battens, lapping ends 150 mm (6") minimum. When using RMA strip, no Batten Cover Strip is required as it does not penetrate the membrane.

.5 Follow procedures outlined in 3.3 for seaming and 3.4 for flashing.

.6 QuickPrime Plus must be used to clean areas where Quickseam products are installed.

SEAMS WITH QUICKSEAM SPLICE TAPE

Position and Fold Back the Lap Edge:

Position the sheet at the splice area by overlapping membrane 125 mm (5"). Once the membrane is in place, mark the bottom sheet 12.7 mm to 19 mm (1/2" to 3/4") from the edge of the top sheet every 1.2 m to 1.8 m (4 to 6 feet) with a lumber crayon or similar type marking device. Tack the sheet back with QuickPrime Plus at 1.5 m (5') centres and at factory splices or as necessary to hold back the membrane at the splicing area.

Apply QuickPrime Plus to Splice Area:

Remove excess amounts of dusting agent on the sheet and at factory splices using a stiff push broom. Stir QuickPrime Plus thoroughly before and during use. Pour QuickPrime Plus in a separate pail to avoid contamination when dipping the QuickScrubber, keeping the QuickScrubber flat. Apply the QuickPrime Plus using long back and forth type strokes with pressure along the length of the splicing area until surfaces become a dark grey in colour. Apply QuickPrime Plus to both surfaces at the same time to allow the same flash off time. Change the scrub pad each 61 m (200 feet) of 75 mm (3 inch) field splice, or when the pad will no longer hold the proper amount of QuickPrime Plus. Additional scrubbing is required at areas that may have become contaminated or have excess amounts of dusting agent, and at all factory splices.

Apply the QuickSeam Splice Tape:

Position the QuickSeam Splice Tape (with paper intact) on the bottom sheet, aligning the edge of the release paper with the markings. Immediately roll the splice tape with a 75 mm - 100 mm (3"- 4") wide silicone or silicone sleeved steel hand roller or stand-up roller.

Check the Splice Tape Alignment:

When the QuickSeam Splice Tape has been installed for the entire splice length allow the top sheet to rest on top of the tape's paper backing. Trim the top sheet as necessary to assure that 3 mm - 12.5 mm (1/8" - 1/2") of the QuickSeam Splice Tape will be exposed on the finished splice.

Remove Paper Backing:

Peel the paper backing off the QuickSeam Splice Tape by pulling against the weight of the bottom sheet at approximately a 45 degree angle to the tape and parallel with the roof surface. Allow the top sheet to fall freely onto the exposed QuickSeam Splice Tape. Broom the entire length of the splice as the release paper is being removed.

Roll the Splice:

Roll the splice using a 37.5 mm (1-1/2") to 50 mm (2") wide silicone or silicone sleeved steel hand roller or stand-up roller, first across the splice, and then along the entire length of the splice.

Special Considerations (End Laps, “T” Joints, etc.):

• End Laps: When the splice is greater in length than the tape, the adjoining QuickSeam Tape must be overlapped a minimum of 25 mm (1") (Refer to Detail LS-2).
• Trim QuickSeam Splice Tape at “T” Joints: Trim QuickSeam Splice Tape so that the edge of QuickSeam Splice Tape and the edge of the membrane are flush beneath the “T” joint area (Refer to Detail LS-3 or LS-4).
• “T” Joints: Apply a section of Firestone QuickSeam Flashing or QuickSeam Joint Cover over the “T” joint area (Refer to Detail LS-3, LS-4, LS-5 or LS-6).
• Using QuickSeam Splice Tape With Cured EPDM As Flashing: If cured EPDM is used as flashing, apply a 200 mm (8") long section of QuickSeam Flashing or a QuickSeam Joint Cover over the intersection of the flashing and field splice intersection (See Detail LS-6 or LS-7).

FLASHING

.1 Install flashing membrane according to Firestone approved details, using the longest pieces practical; extend minimum 200 mm (8") vertically except where not practical; provide perimeter fixation in accordance with Firestone's details.

.2 Splice flashing to vertical surfaces first before splicing to field sheet.

.3 Install QuickSeam FormFlash at inside and outside corners when using RubberGard membrane for flashing (when permitted by detail).

.4 Apply BA-2004 bonding adhesive, water-based Bonding Adhesive or LVOC Bonding Adhesive evenly to both surfaces; allow to dry until tacky but not stringy or sticky to the touch of a clean, dry finger.

.5 Roll flashing evenly without causing wrinkles.

.6 Peel release sheet off FormFlash, when used; membrane should be contoured to the substrate without any bridging or gapping.

.7 Consult Firestone's approved details and recommended procedures for the system specified.

FIRESTONE'S APPLICATION STEPS AND RELATED INSPECTION CRITERIA

Common EPDM Membrane System Installation Parameters

Major Inspection Criteria (* Most Common Errors)

SEAM WITH TAPE

.1 Provide minimum lap

75 mm (3") for most systems

.2 Clean properly

Remove all contaminants with QuickPrime Plus.

3. Apply QuickPrime Plus properly

Beyond marks and edge of the top membrane*

.4 Close without gaps (fishmouths)

Provide continuous flat seam

VERTICAL FLASHING APPLICATION (WALLS, CURBS,ETC.)

.1 Inspect substrate for required conditions

Sound substrate; do not cover through-wall flashing

.2 Provide minimum flashing height

200 mm (8") extend above maximum ponding limit

.3 Use proper wall adhesive

Bonding adhesive, water-based or LVOC Bonding Adhesive.

.4 Flashing to membrane seam

See seaming method above

.5 Provide minimum base lap

150 mm (6") for cured EPDM flashing; 75 mm (3") for QuickSeam FormFlash

.6 Avoid bridging at base

Less than 6 mm (1/4")

.7 Provide joint cover for cured wall flashing

150 mm (6") wide QuickSeam FormFlash*

a) Lap joint

QuickSeam FormFlash 75 mm (3") min. vertical and horizontal

b) Butt joint

Must be less than 6 mm (1/4"); QuickSeam FormFlash 75 mm (3") onto deck membrane*

.8 Termination

Required at top of all vertical flashing*

a) Nail off under counterflashing

300 mm (12") on centre 75 mm (3") above counter- flashing lip

b) Termination bar

Firestone T-bar with slotted fastener holes; 6 mm (1/4") gap between 3 m (10') bars; Smooth, non-porous and sound substrate (not wood)*; continuous compression along bar; do not continue around corners; fasten within 25 mm (1") from each end; Water Block between membrane and substrate; Lap sealant HS along top of bar.

.9 For cured membrane flashing on high walls

Provide intermediate horizontal attachment in reroof application where existing flashing remains. New substrates require no intermediate attachment unless higher that 5 feet.

INSIDE CORNER SEE C-5

.1 Use correct material

Uncured QuickSeam FormFlash

.2 Correctly fold “pig ear”

Fold onto the vertical not the horizontal *

.3 Flash over “pig ear”

Begin in the corner and continue 75 mm (3") beyond the “pig ear”

.4 Flashing to membrane seam

See seaming method above

OUTSIDE CORNER SEE C-1

.1 Use correct material

Uncured QuickSeam Corner Flashing

.2 Provide minimum height

75 mm (3")

.3 Provide minimum base lap

75 mm (3") lap, less than 6 mm (¼") bridging *

.4 Continue far enough each side of corner

75 mm (3")

.5 Sealant

Lap Sealant all around the patch extending 75 mm (3") both sides.

.6 Flashing to membrane seam

See seaming method above

ROOF DRAIN

.1 Use correct material

Cured EPDM membrane

.2 Provide clearance from field seams

450 mm (18")

.3 Carefully cut in opening; punch holes

25 mm (1") smaller than drain ring; always larger for bolts; do not cut membrane back than drain pipe to compression ring

.4 Provide drain ring sealant

Water Block on drain bowl ring under the membrane

.5 Securely fasten the drain ring

All bolts present and tightened *

.6 Install basket

Keep debris out

FIELD FABRICATED PIPE FLASHING

.1 Inspect penetration for required

25 mm (1") minimum diameter, round, clean, conditions immobile, not hot

.2 Wood nailer

For large penetrations, some systems

.3 Use correct material

Uncured QuickSeam FormFlash

.4 Provide minimum height

200 mm (8") minimum; extend above maximum ponding limit

.5 Provide minimum base flange

100 mm (4") lap; less than 6 mm (¼") bridging*

.6 Provide minimum base turn-up onto pipe

50 mm (2")

.7 Provide minimum wrap turn-out onto base

50 mm (2")

.8 Provide minimum wrap lap

50 mm (2")

.9 Provide top sealant

Use lap sealant - DO NOT INSTALL CLAMP AT TOP

.10 Flashing to membrane seam

See seaming method above

.11 Provide clearance from field seams

450 mm (18")

PREFABRICATED PIPE FLASHING

.1 Inspect penetration for required conditions

25 mm (1") to 165 mm (6-1/2") outside diameter, round, clean, immobile, not hot

.2 Wood nailer

For large penetrations, some systems

.3 Use correct size

Snug fit when cut at incremental ribs *

.4 Do not overlap adjacent flanges

If necessary use field fabricated flashing *

.5 Do not cut or patch

If necessary use field fabricated flashing *

.6 Provide top sealant

Use lap sealant - install stainless steel clamp at top

.7 Flashing to membrane seam

See seaming method above

.8 Provide clearance from field seams

450 mm (18")

PENETRATION POCKET

.1 Inspect penetration for required conditions

Clean, immobile, not hot *

.2 Use correct size

25 mm (1") minimum clearance between penetration and pan

.3 Wood nailer fastened to deck

Wide enough to extend beyond pan flange *

.4 Provide pan flange sealant

Water Block between pan flange and nailer

.5 Securely fasten metal to wood nailer

No more than 150 mm (6") between fasteners

.6 Provide minimum height

50 mm (2") minimum pan height; 25 mm (1") minimum new pourable sealer depth

.7 Provide minimum base lap

75 mm (3") wide lap to membrane; less than 6 mm (1/4") bridging

.8 Flashing to membrane seam

See seaming method above

.9 Correctly prepare sealing material

Thoroughly stir two-part pourable sealer or use cartridge with static mixer *

.10 Correctly place sealing material

Mound pourable sealer to prevent ponding *

SCUPPER

.1 Wood nailer

Sized to extend beyond the scupper flange *

.2 Form metalwork

Rounded flange corners, watertight fabrication *

.3 Provide scupper flange sealant

Water Block between flange and membrane

.4 Scupper securely fastened

No movement; flange held continuously flat

.5 Use correct material to flash onto scupper

Uncured QuickSeam FormFlash; less than 6 mm (¼") bridging *

.6 Provide minimum flashing

75 mm (3") minimum; 75 mm (3") beyond fasteners to membrane lap

.7 Provide minimum flashing

75 mm (3") minimum; 75 mm (3") beyond fasteners into scupper lap

.8 Flashing to membrane seam above

See seaming method

ROOF PERIMETER (WALLS, EDGES, ETC.)

.1 Into vertical or horizontal wall, curb,

No gap greater than 25 mm (1") above the plane or woodnailer of the roof

.2 QuickSeam RPF strip

Fastened vertically or horizontally with Firestone batten strip or with 55 mm (2 ¼") Firestone V-plates, anchored max. 300 mm (12") o/c with Firestone fasteners. Maximum fastener length for horizontal application not to exceed 150 mm (6"). Batten strip vertically anchored are not acceptable for ballasted systems. Use AP sealant over fastener heads when installed on batten strip only.

.3 Flash over perimeter attachment

See seaming method above

a) Horizontal

Cover flange, 75 mm (3") past fasteners, extend 75 mm (3") onto membrane

b) Vertical

QuickSeam FormFlash 75 mm (3") onto deck membrane, 75 mm (3") above fastening strip

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2 Membrane Assemblies

2.1 Adhered Systems

Slope Limitation: Min: Dead Flat Max. Vertical

In-Service Performance Min.: -48°C (- 55°F)

Temperature of the Max.: +50°C (+122°F)

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Steel	Minimum fastener pullout of 136 kg (300 lbs) of pullout resistance per fastener. Where the deck system will not provide a minimum of 136 kg (300 lbs) of pullout resistance, refer to the Firestone Design Guide for alternative fastener spacing.
	Wood
	Concrete
Vapour Retarder	Various, as accepted by manufacturer	Need, type, and placement must be determined by design authority.
Insulation	Polyurethane	Consult Firestone for specific restrictions.
	Polyisocyanurate
	Fibreboard
	Pre-approved
	alternatives
	Glass fibreboard
	Extruded polystyrene	These insulations require 12 mm (1/2") fibreboard overlay.
	Expanded polystyrene
	Perlitic
Insulation Attachment	Firestone fasteners	See Firestone Technical Bulletin for attachment and plates fastener placement; comply with RGC Guarantee Standards.
Membrane	1.2 mm RubberGard
	1.2 mm FR RubberGard
	1.6 mm RubberGard
	1.6 mm FR RubberGard
	2.3 mm RubberGard Platinum
Attachment Adhesive	Firestone Bonding
Flashings and Details	Firestone EPDM or	See Firestone manual for complete details.
	QuickSeam FormFlash	Neoprene around units, which may leak oils, or around exhaust fans that deposit grease on the roof.

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2.2 Ballasted Systems

Slope Limitation: Min: Dead Flat Max. 2:12

In-Service Performance Min.: -48°C (- 55°F)

Temperature of the Max.: +50°C (+122°F)

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Steel	Structure must be able to carry the dead load of 50
	Wood	kg / m2 (1000 lb / square) minimum.
Vapour Retarder	Various, as accepted by manufacturer	Need, type, and placement must be determined by design authority.
Insulation	Glass fibreboard	Consult Firestone for specific restrictions.
	Extruded polystyrene
	Expanded polystyrene
	Polyisocyanurate
	Fibreboard
	Perlitic
	Pre-approved alternatives
Insulation Attachment	None required	Ballast holds entire system in place.
Membrane	1.2 mm RubberGard
	1.6 mm RubberGard
Attachment	50 kg/m2	19 mm to 40 mm (3/4" to 1-1/2") round, washed
	(1000 lb / square)	stone. An alternative is to use Firestone ballast protection of ballast mat and crushed rock (same sizes).
Flashings and Details	Firestone EPDM	See Firestone manual for complete details. Use
	QuickSeam FormFlash	Neoprene around units, which may leak oils, or around exhaust fans that deposit grease on the roof.

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2.3 Mechanically Attached: Penetrating and/or Non-penetrating System (RMA Strip) Batten-in-the-Seam

Slope Limitation: Min: Dead Flat Max. 2:12

In-Service Performance Min.: -48°C (- 55°F)

Temperature of the Max.: +50°C (+122°F)

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Steel	Minimum fastener pullout of 180 kg (400 lbs) of pullout resistance per fastener. Where the deck system will not provide a minimum of 180 kg (400 lbs) of pullout resistance refer to the Firestone Design Guide for guidelines.
	Wood
	Concrete
Vapour Retarder	Various, as accepted by manufacturer	Need, type, and placement must be determined by design authority.
Insulation	Polyisocyanurate
	Fibreboard	Fibreglass is not an acceptable component for mechanically attached systems.
	Pre-approved
	alternatives	Fibreglass on existing roofs must be removed.
	Extruded polystyrene	These insulations require 12 mm (½") fibreboard overlay.
	Expanded polystyrene
Insulation Attachment	Firestone fasteners	See Firestone Technical Bulletin for attachment and plates fastener placement.
Membrane	1.1 mm RubberGard
	1.1 mm FR RubberGard
	1.5 mm RubberGard
	1.5 mm FR RubberGard
Mechanical Attachment	Firestone batten strips (metal or polymer)	Placed either in the seam [using 3 m (10’) wide sheets] or over the membrane and covered using Quickseam batten cover strips or on the QS RMA strip (when using large sheets). V-plate can be used on QS RMA strip only.
Flashings and Details	Firestone EPDM	See Firestone manual for complete details
	QuickSeam FormFlash	Neoprene around units, which may leak oils, or around exhaust fans that deposit grease on the roof.

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