2-Ply SBS Membrane & Torch-On Roofing
Direct Roofing installs, replaces and repairs 2-ply SBS modified-bitumen roofing systems for residential homes, townhouses, multi-family and strata properties across the Fraser Valley and Lower Mainland. We commonly work with SOPREMA membrane systems and tailor the assembly to the roof, substrate, drainage, detailing and project requirements.
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Two Layers of Protection for Flat & Low-Slope Roofs.
A 2-ply SBS roofing assembly uses SBS-modified bitumen membranes to create a multi-layer waterproofing system. A typical assembly includes a base sheet and a cap sheet, with flashings and accessories integrated around walls, curbs, drains, skylights and roof penetrations.
SBS-modified bitumen remains flexible and is widely used in Canadian low-slope roofing. Depending on the selected assembly, membranes may be heat-welded, mechanically fastened, adhered or installed using flame-free approaches where appropriate.
Base sheet membrane
Granulated cap sheet
Perimeter & wall flashings
Drains & scupper detailing
Roof penetrations & curbs
Deck / substrate preparation
Insulation where required
Final seam & detail inspection
Ideal for Many Residential Low-Slope Applications.
2-ply SBS membrane is especially useful where shingles are not appropriate because the roof pitch is too low.
Flat Roof Homes
Modern and traditional homes with flat or low-slope roof sections.
Home Additions
Rear additions, extensions and low-slope transitions attached to steeper roofs.
Garages & Carports
Detached or attached garages, carports and accessory structures.
Deck / Roof Areas
Selected low-slope roof areas below non-occupied assemblies where the system is appropriate.
Townhouse Complexes
Repeated low-slope roof sections across multi-unit developments.
Apartment Buildings
Multi-family low-slope roofs and localized membrane areas.
Canopies & Entrances
Small flat or low-slope architectural roofs over entrances and transitions.
Complex Roof Transitions
Areas where low-slope membranes integrate with shingles, metal or wall systems.
Built for Low-Slope Waterproofing in Canadian Conditions.
SBS-modified bitumen combines asphalt waterproofing with polymer modification and reinforcement. When installed as a complete system, it provides strong puncture, tear and dimensional performance for demanding low-slope roofs.
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Multi-Layer Waterproofing
Two membrane layers create redundancy compared with a single exposed waterproofing layer.
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Flexible SBS Technology
SBS modification improves flexibility and allows membranes to perform in changing temperatures.
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Strong Reinforcement
Reinforced base and cap membranes can offer strong puncture, tear and dimensional resistance.
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Detailed Flashing Capability
Membrane can be integrated around curbs, walls, drains and roof penetrations with system-compatible accessories.
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Repairable System
Localized membrane damage or flashing issues can often be evaluated for targeted repair when the overall roof remains serviceable.
Most Leaks Start at Details Not - in the Middle of the Roof.
Wall & Parapet Flashings
Membrane transitions at walls, curbs and vertical surfaces need secure terminations and compatible flashing details.
Drains & Scuppers
Water must reach roof drains and overflow routes without ponding around vulnerable membrane transitions.
Roof Penetrations
Plumbing vents, mechanical curbs, skylights and other penetrations require carefully integrated membrane work.
Roof-to-Shingle Transitions
Residential low-slope areas often meet steeper shingle roofs and need properly sequenced waterproofing details.
Edge Metal & Terminations
Drip edges, perimeter metal and membrane terminations help manage water at roof edges and transitions.
Slope & Ponding Areas
Existing drainage patterns should be reviewed so standing water and low spots are understood before replacement.
Making the Right Decision
Repair vs. Full SBS Roof Replacement.
Repair May Make Sense
- One isolated leak or puncture
- Localized flashing failure
- Small damaged membrane area
- Roof has reasonable remaining life
Replacement May Make Sense
- Recurring leaks in multiple locations
- Widespread membrane deterioration
- Extensive blistering or seam problems
- Underlying deck or drainage issues
- Repeated repairs are adding up
Start With an Inspection
- Review roof condition
- Identify likely failure points
- Discuss repair and replacement options
- Provide a project-specific quote
Questions Before You Request a Quote?
“Torch-on” usually refers to heat-welded application of modified-bitumen membranes. 2-ply SBS describes the roofing system itself. SBS systems can also use mechanically fastened, adhered or flame-free application methods depending on the selected assembly.
SOPREMA offers a broad family of SBS-modified bitumen roofing membranes, including heat-welded, mechanically fastened and adhered options, plus compatible accessories and system components. The exact product combination depends on the project.
Yes, when the roof is otherwise serviceable. Repairs can involve seams, punctures, flashings, penetrations, drains and localized membrane areas. Inspection is needed to determine whether repair or replacement is the better choice.
