Everest Supply Inc. Guide Specification
Everest Supply Inc. Guide Specification
Built-Up Roofing, Division #07510
PART 1 - GENERAL
1.1RELATED WORK
Wood cants, blocking, curbs and nailing stripsSection []
Roof accessories, expansion joints, skylights, hatchesSection []
Roof drains or hoppersSection []
Sheet metalSection []
1.2REFERENCE
Do roofing work in accordance with the good roofing practices as outlined in the Canadian Roofing Contractors’ Association (CRCA) Specifications Manual.
Roofing system to meet the requirements of:
Spec Note: list
CAN/ULC S126-M86
CAN/ULC S107-M87 Class [] (list A, B, or C)
CAN/ULC S101-M82
Factory Mutual Class 1 Fire and [] Windstorm Rated (list 1-60 or 1-90)
1.3MATERIAL HANDLING
Keep roofing materials dry. Store rolls on end, with selvage edges up. Store roll goods and insulation in a dry ventilated area protected from adverse weather conditions.
1.4WARRANTIES
1.4.1Provide a [] (list CRCA or OIRCA) Standard Form of Warranty stating that the roofing contactor will warrantee to repair at its own expense any actual leaks in the roofing system, flashing membrane and related sheet metal work resulting from faulty workmanship for a period of two years on the roofing system and one year on related sheet metal work from the date of completion.
1.4.2Provide an Everest Supply Inc. Roofing Systems Warranty for a period of [] years (list five or ten) to cover the repair labour and materials costs required to restore the roof system to a watertight condition, after a leak has occurred as a result of faulty materials. All materials to be supplied by Everest Supply Inc.
1.4.3Provide a Bakor Roofing Systems Warranty for a period of [] years (list five or ten) to cover the labour workmanship and materials costs required to restore the roof system to a watertight condition, after a leak has occurred as a result of faulty materials or workmanship. All materials to be supplied by Everest Supply Inc.
PART II – PRODUCTS
2.1DENS-DECK
Georgia Pacific Dens-Deck 1200 mm x 2400 mm (4’x8’) sheets [] thick.
Spec Note: thermal barrier as required by local building authorities and/or ULC Listing, 6.35 mm (0.25”), 12.7 mm (0.5”), or 15.9 mm (0.625”) thick.
2.2MECHANICAL FASTENERS
SFS Stadler Roof Insulation Fasteners supplied by Everest, [ ] screw length,
[] plates. At least 19 mm (0.75”) penetration into top flange of steel roof deck, 25.4 mm (1.0”) penetration into wood or concrete.
Spec Note: metal or plastic plates.
2.3PRIMER
2.3.1Primer for all hot applied membranes shall be Bakor Penetrating Asphalt Primer 910-01 meeting CGSB 37-GP-9M supplied by Everest and be fully compatible with membranes.
2.3.2Primer for all thermofused applications shall be Bakor 930-18 rubberized primer supplied by Everest and be fully compatible with membranes.
2.3.3Primer for all self adhered base sheet flashings shall be Bakor 930-38 or 9000-34 supplied by Everest and be fully compatible with membranes.
2.4VAPOUR RETARDER
2.4.1Vaporstop Vapour Retarder meeting CAN/CSA 51.33-M89 Type II supplied by Everest.
2.4.2Permabloc Plus Vapour Retarder meeting CAN/CSA 51.33-M89 Type I supplied by Everest.
2.4.3No. 15 Felt Perforated meeting CAN/CSA A123.3 supplied by Everest.
2.5VAPOUR RETARDER ADHESIVE
Bakor Vapor-Bloc Non-Flammable Adhesive supplied by Everest.
2.6ROOF INSULATION
2.6.1Atlas AC Foam II, polyisocyanurate foam, manufactured HCFC Free with organic/inorganic felt facers meeting CAN/ULC-S704, [ mm ( “)] thick in board size [ mm x mm ( ‘x ‘ )] supplied by Everest.
Spec Note: specify insulation thickness and board size, either 1200 mm x 1200 mm (4’x4’) or 1200 mm x 2400 mm (4’x8”).
2.6.2Standard Fibreboard Roof Insulation, rigid wood fibreboard meeting CAN/CSA A247-M86, [ mm ( “)] thick in board size [ mm x mm ( ‘x’ )] supplied by Everest.
Spec Note: specify fibreboard thickness and board size, 600 mm x 1200 mm (2’x4’), 1200 mm x 1200 mm (4’x4’) or 1200 mm x 1200 mm (4’x8’).
2.6.3High Density, Asphalt Impregnated Fibreboard Roof Insulation, rigid wood fibreboard, high density and asphalt-impregnated meeting CAN/CSA A247-M86, 12.7 mm (0.5”) thick in board size [ mm x mm ( ‘x ‘)] supplied by Everest.
Spec Note: specify board size 600 mm x 1200 mm (2’x4’), 1200 mm x 1200 mm (4’x4’) or 1200 mm x 2400 mm (4’x8’).
2.7CANTS
2.7.1Wood fibreboard cants, 75 mm x 75 mm (3”x3”) supplied by Everest.
2.7.2Torchable cant strips, 75 mm x 75 mm (3”x3”) supplied by Everest.
2.8ROOFING ASPHALT
2.8.1Roofing asphalt conforming to CSA A123.4 Type [].
Spec Note: Specify asphalt type, Type 1 on slopes up to 1:16 (0.75” in 12”), Type 2 on slopes up to 1:8 (1.5” in 12”) or Type 3 on slopes up to 1:4 (3” in 12”) and all flashings.
2.8.2Bakor Kettle Modified Rubberized Asphalt SEBS 890-12 meeting ASTM D6152-99 for mopping application as the waterproofing in built-up roofing systems, reinforced with fiberglass felts in standard asphalt roofing kettles.
2.9ROOFING MEMBRANE
2.9.1No. 15 Perforated Asphalt Roofing Felt meeting CSA 123.3 supplied by Everest.
2.9.2Fiberglass roofing felts Type IV as manufactured by Bakor meeting ASTM D2178 Type IV, supplied by Everest.
2.9.3Fiberglass roofing felts Type VI as manufactured by Bakor meeting ASTM D2178 Type VI, supplied by Everest.
2.10MEMBRANE FLASHING
2.10.1No. 15 Perforated Asphalt Roofing Felt meeting CSA 123.3 supplied by Everest.
2.10.2Bakor Modified Plus styrene butadiene styrene (SBS) modified bitumen flashing membranes meeting CGSB 37-GP-56M, supplied by Everest. Base flashing to be [ ], cap flashing to be [ ].
Spec note: List base flashing sheet G100 p/s, G100 p/p, G100 s/s, NP180 p/s, NP180 p/p NP180 s/s or NP180 Tack Sheet. List cap sheet flashing NP180gM4, NP180gT4, NP250gM4, NP250gT4.
2.11GRAVEL
To ASTM D1863, clean crushed stone, slag, pea stone or gravel. Roofing gravel 5 mm to 20 mm in size, well graded, opaque, non-porous, washed, and free from fines, long splinters, moisture, ice and snow.
2.12SHEET METAL
Specify material required for sheet metal flashing, including gauge, colour and finish type.
PART III – EXECUTION
3.0PREPERATION GENERAL
Apply roofing over clean, dry surfaces, prepared in accordance with CRCA recommendations. Do not apply roofing during rain, snow or fog conditions. Surfaces shall be clan, dry, firm and smooth. Do not apply roofing over damp, frozen or unsuitable surfaces. Check roof levels for proper fall to drains. Check that cants, blocking and penetrating objects are solidly fixed in place. Report any defects. Supply in sufficient time: inserts, reglets, scuttles and other accessories to be built into work of other trades.
3.1PREPERATION
3.1.1Removal of existing roofing system.
Remove completely vapour retarder, roof insulation, coverboard, and existing membrane, surfacing and flashing.
3.1.2Repair of steel deck.
Apply rust-inhibiting paint to all rusted metal sections. Remove completely all rusted through metal sections. Replace removed metal to original contract specifications.
3.1.3Repair of wood deck.
Remove completely all rotted and/or deteriorated wood sections. Replace removed wood with new wood to original contract specification. Cover any knotholes, cracks and twisted planks with fastened in place sheet metal.
3.1.4Repair of poured-in-place concrete deck.
Remove all sharp ridges, projections and irregularities. Fill all voids and repair all spalled areas with patching compound.
3.1.5Preparation of existing BUR membrane.
Power scrape and power broom BUR membrane. Remove all loose gravel and debris. Cut out all blisters and irregularities. Prime substrate to receive new roofing. Repair any defects of BUR membrane with two plies of No. 15 Asphalt Perforated Felt and specification asphalt.
3.1.6Preparation of BUR membrane and roof insulation.
Power scrape and power broom BUR membrane. Remove all loose gravel and debris. Cut out all blisters and irregularities. Remove all saturated and/or defective roof insulation. Repair any discontinuities of existing vapour retarder. Replace removed materials to original contract specification. Prime substrate to receive new roofing. Repair any defects of BUR membrane with two plies of No. 15 Asphalt Perforated Felt and specification asphalt.
3.1.7Preparation of single ply membrane and roof insulation.
Remove existing ballast and membrane down to existing insulation suitable for BUR roofing. Replace any wet or damaged areas with insulation of compatible thickness and thermal resistance.
3.1.8Preparation of existing flashing.
Remove metal flashing, counter flashing, plastic pan etc. Replace rotted and/or deteriorated wood with new pressure treated wood blocking.
3.1.9Repair any discontinuities of existing vapour retarder.
Extend existing vapour retarder to perimeter and deck protrusions. Seal all ends with roofing asphalt or adhesive to provide continuity of building air/vapour retarder.
3.1.10Dispose of all removed materials from roof and site.
3.1.11Provide a level and smooth substrate suitable for the installation of the new roofing system.
3.1.12Prime concrete deck.
Spec note: list Bakor 910-01, Bakor 930-18, Bakor 930-38 or Bakor 900-34.
3.2WOOD BLOCKING
Install wood blocking at entire perimeter of roof and at projections and penetrations to specification and as detailed. Match height of blocking with height of insulation.
3.3DENS DECK
3.3.1Install Dens Deck over steel deck with long side parallel to the flutes of the steel deck. Provide full support at ends. Cut and trim boards to provide plain butt joints at perimeter, parapet, curbs etc. Lay boards in parallel course, butted together in moderate contact without gaps, staggered end joints.
3.3.2Mechanically attach Dens Deck to steel deck with fasteners and plates in accordance with local building codes and/or in accordance with UL or FM recommendations.
3.3.3Adhere gypsum boards to steel deck. Provide continuous ribbons of adhesive on each flute.
3.4VAPOUR RETARDER
3.4.1Install [] Vapour Retarder dry laid over [] deck. Overlap all side laps a minimum of 50 mm (2”) and end laps 150 mm (6”). Extend vapour retarder to perimeter and deck protrusions. Seal all laps with adhesive to provide a vapour-tight seal ensuring continuity of building air/vapour retarder.
Spec note: list for system with mechanically fastened insulation, list Vaporstop 198 Vapour Retarder or Permabloc Plus Vapour Retarder, list steel, concrete or wood.
3.4.2Install [ ] Vapour Retarder with Adhesive at a rate of 0.33 gal/100 ft2 (0.16 L/m2) in ribbon type fashion, a ¾” ribbon on each top flange. Overlap all side laps a minimum of 2" (50mm) and end laps 6" (150mm). Extend vapour retarder to perimeter and deck protrusions. Seal all laps with Adhesive to provide a vapourtight seal ensuring continuity of building air/vapour envelope.
Spec note: list for system with asphalt adhered insulation or adhesive adhered fibreboard insulation. List: Vaporstop 198 Vapour Retarder or Perma-Bloc Plus Type 1 Vapour Retarder.
3.4.3 Ensure side laps rest on top flange of steel deck.
3.4.4 Install 2 ply No. 15 Perforated Felt Vapour Retarder to CRCA specification[ ] over [ ].Seal all ends with hot asphalt to provide continuity of building air/vapour envelope.
Spec note: list for steel deck: SVR5, wood deck: WVR5, concrete deck: CVR5.
list: steel deck / wood deck / concrete deck.
3.4.5Seal Vapour Retarder to all penetrations and protrusions to provide continuity of building air vapour envelope.
3.5. ROOF INSULATION
3.5.1Provide roof insulation with a total R(RSI) of [ ( )].
3.5.2 Install [ ] roof insulation over vapour retarder with long side parallel to flutes of steel deck.
Spec note: list for steel deck application.
list Atlas AC Foam II, Standard Fibreboard, Weatherguard Fibreboard.
3.5.3 Loose lay first layer of [ ] roof insulation over [ ] vapour retarder.
Spec note: list for multiple layer insulation application with mechanical fastening through top layer of insulation.
list Vaporstop 198, Perma-Bloc Plus, or 2 Ply Asphalt Felt Application.
3.5.4 Install [ ] roof insulation over [ ] using SFS Stadler Fasteners and Plates in accordance with local building codes and/or insurers and/or a minimum of 2 fasteners per 2'X4' (610mm x 1219mm); 4 fasteners per 4’x4’ (914mm x 1219mm); 6 fasteners per 4'X8' (1219mm x 2438mm).
Spec note: list for mechanically fastened application
list Atlas AC Foam II, Standard Fibreboard, Weatherguard Fibreboard.
list Vaporstop 198; Perma-Bloc Plus; or 2 Ply Asphalt Felt Application; vapour retarder.
or list Atlas AC Foam II Roof Insulation for multiple layer application.
3.5.5Install [ ] roof insulation over [ ] vapour retarder using specification asphalt with a minimum EVT of 425F (218C). Asphalt applied at a nominal rate of 25lbs/100ft2 ( 1.25 kg/m2) in a smooth continuous uniform coat to ensure good adhesion. Check attachment tenacity from time to time by removing and inspecting an installed board.
Spec note: list for asphalt attached application.
list Atlas AC Foam II, Standard Fibreboard, Weatherguard Fibreboard.
list Vaporstop 198, Perma-Bloc Plus, or 2 Ply Asphalt Felt Application.
list Atlas AC Foam II maximum board size 4’x4’(1219mmx1219mm).
3.5.6 Install [ ] fibreboard roof insulation over [ ] using Vapourbloc Adhesive at a rate of 0.66 gal/100ft2 (0.32 L/m2) applied by roller or mechanical means in a ribbon fashion over substrate. Consult Everest Supply for details on adhesive attached roofing systems.
Spec note: list for adhesive attached application, but not in conjunction with Atlas AC Foam II Roof Insulation.
list Standard Fibreboard, Weatherguard Fibreboard.
list Vaporstop 198; Perma-Bloc Plus; or 2 Ply Asphalt Felt Application; vapour retarder.
3.5.7Install [ ] roof insulation over Atlas AC Foam II Roof Insulation using specification asphalt with minimum EVT of 425 F (218C). Asphalt applied at a nominal rate of 25lbs/100ft2 (1.25 kg/m2) in a smooth uniform coat to ensure good adhesion. Check attachment tenacity from time to time by removing and inspecting an installed board.
Spec note: list for multiple layer application.
list Standard Fibreboard, Weatherguard Fibreboard.
3.5.8Lay multiple layers with joints offset from underlying layer.
3.5.9Butt insulation boards moderately together without gaps. Stagger end joints. Fit accurately to abutting surfaces. Lay insulation in parallel courses.
3.6. ROOF MEMBRANE
3.6.1 4 PLY BUR APPLICATION
Starting at low point, at right angles (perpendicular) to the slope, embed four plies of [ ] in shingle fashion (starter sheets required) in uniform moppings of specification asphalt at a rate of approximately 25 lbs/100ft2 (1.2 kg/m2). Ensure visible 'bleedout' of asphalt at plies. If hand mopping, asphalt shall be kept to a maximum of 6 ft (1.8m) ahead of roll. Terminate the felts at the top of cants.
Spec note: list Fiberglass roofing felts Type VI, Fiberglass roofing felts Type IV, or No. 15 Asphalt Perforated Felt.
3.6.2 Roll or squeegee sheets to obtain complete embedment and to eliminate wrinkles, buckles, or air pockets. Avoid foot traffic or equipment on freshly applied layers.
Spec note: list for Fiberglass roofing felts Type VI or Fiberglass roofing felts Type IV application.
3.6.3 On uninsulated wood decks, stating at low point, at right angles to the slope, lay dry 2 plies No. 15 Asphalt Felt. Lap sides 4" (100mm), ends 6" (150mm). Fasten with roofing nails spaced 12" (300mm) o/c. at edges, 12" (300mm) o/c. both ways in field. Commence application of the membrane as previously described.
3.6.4 On uninsulated concrete decks, apply Bakor Asphalt Primer to concrete deck at a rate of 1/2 to 1 gal per 100ft2 and allow to thoroughly dry. Commence application of membrane as previously described.
3.6.5 Perimeter Restraint
Securely fasten roof membrane around perimeter and at penetrations, curbs,
expansion joints, etc.. Use roofing large head nails spaced 8" (200mm) o/c.
3.6.6 Sloped Decks
On slopes exceeding 1" in 12" (1:12) membrane should be fastened to treated wood nailers. Nails should be spaced 24" (600mm) o/c. along the upper edge (under laps) 2" (50mm) from edge.
3.7. Gravel Surfacing
Flood coat membrane with specification asphalt at a rate of 60 lbs/100ft2
(3 kg/m2) and while hot, spread gravel uniformly at a rate of 400 lbs/100ft2 (20 kg/m2).
3.8. Protected Membrane Assemblies
Flood coat membrane surface with specification asphalt at a rate of 60 lbs/100ft2 (3 kg/m2) and allow to completely cool prior to application of exterior insulation. Install exterior roof insulation unbonded, over roof membrane in accordance with exterior insulation manufacturer's recommendations and/or CRCA recommendations. Install filter fabric and ballast over installed insulation in accordance with exterior insulation manufacturer's recommendations and/or CRCA recommendations.
3.9. MEMBRANE FLASHINGS
3.9.1Install Primer to Flashing Membrane Substrate.
Spec note: list Bakor 910-01, Bakor 930-18, Bakor 930-38 or Bakor 900-34.
3.9.2.Install [ ] membrane flashing in accordance with the appropriate CRCA FL series specification.
Spec note: list 4 Ply No. 15 Asphalt Felt for 4 Ply No. 15 Asphalt Felt Membrane.
list 2 Ply Bakor Membrane Flashing for 4 Ply Glass Felt Membrane Type IV or Type VI.
3.9.3Extend flashing membrane onto roof membrane at least 10" (250mm) and up vertical surfaces at least 8" (200mm) above roof membrane or ballast. Seal top edges watertight, and protect with sheet metal counterflashing. Fasten wall flashing a minimum of 8" (200mm) above finished roof membrane. Use roofing nails spaced 8" (200mm) o/c. Flash and seal roof drains, vents, and other items placed on, or projected through the roof membrane.
Spec note: list for 4 Ply No. 15 Asphalt Felt Membrane Flashing
3.9.4 Mop in Bakor base sheet flashing membrane extending a minimum of 4" (150mm) from the toe of the cant onto the field membrane. Base flashing should be installed in roll widths of 3.3' (1m) with 4" (100mm) side laps. Offset joints of base flashing a minimum of 12" (300mm) from joints of the field base sheet.
Spec note: list for mop down base flashing
list for 4 Ply Glass Felt Membrane Type IV or Type.
3.9.5Torch fuse Bakor base sheet flashing extending a minimum of 4" (150mm) from the toe of the cant onto the field membrane. Base flashing should be installed in roll widths of 3.3' (1m) with 4" (100mm) side laps. Offset joints of base flashing a minimum of 12" (300mm) from joints of the field base sheet.
Spec note: list for torch down base flashing
list for 4 Ply Glass Felt Membrane Type IV or Type VI.
3.9.6Self-adhere base sheet flashing. Set in place and pull back release film 6” (150mm) to 12” (300mm) and place on to prepared surface. Remove release providing overlaps 3” (75mm) on side laps and 6” (150mm) on end laps. Treat end laps by heating with flame to melt polyfilm. Begin application 4” (100mm) from toe of cant and extend vertically as indicated. Mechanically fasten base sheet flashing using min 1” (25mm) round top nails 8” (200mm) o.c..
Spec note: list for self-adhered base flashing
list for 4 Ply Glass Felt Membrane Type IV or Type VI.
3.9.7Mop in Bakor cap flashing membrane in 3.3' (1m) widths to the base flashing membrane. The cap flashing membrane extends a minimum of 6" (150mm) from the toe of the cant onto the field membrane. Granules on the underlying sheets are to be trowelled in. Offset joints of underlying sheets a minimum of 12" (300mm).
Spec note: list for mop down cap flashing.
list for 4 Ply Glass Felt Membrane Type IV or Type VI.
3.9.8Torch fuse Bakor cap flashing membrane in 3.3' (1m) widths to the base flashing membrane. The cap flashing membrane extends a minimum of 6" (150mm) from the toe of the cant onto the field membrane. Granules on the underlying sheets are to be trowelled in. Offset joints of underlying sheets a minimum of 12" (300mm).
Spec note: list for torch down cap flashing
list for 4 Ply Glass Felt Membrane Type IV or Type VI.
3.9.9Granules of underlying cap sheet are to be trowelled in at all overlaps to ensure proper adhesion.
3.9.10Never torch directly to wood, fibreboard, gypsum board or other flammable surfaces. Provide fire extinguishers (one per torch applicator) near area where 'torchon' applications are underway.
3.9.11Sandwich flanges of vents, etc. between base membrane and a square patch extending 12" (300mm) beyond the flange.