SBS System Components
Our SBS modified bitumen systems are built for Alberta's demanding climate with premium materials throughout.
Membrane Layers
- SBS-modified base sheet (glass or poly reinforced)
- SBS cap sheet with granular or smooth surface
- White, tan, or colored granule options
- Reflective aluminum or mineral surface caps
Supporting Components
- Polyiso or EPS insulation boards
- HD gypsum or wood fiber cover board
- Modified bitumen flashings
- Metal edge and termination details
Installation Process
- Existing roof assessment and testing
- Tear-off or preparation of substrate
- Insulation and cover board installation
- Base sheet application
- Cap sheet torch/adhesive application
- Flashing and penetration detailing
- Edge metal and accessories
- Quality inspection and cleanup
| Service Type | Price Range |
|---|---|
| SBS Recover (2-Ply) | $5.50 – $9.00/sq ft |
| Full SBS Replacement | $7.50 – $13.00/sq ft |
| SBS Repairs | Contact for quote |
Why SBS Is Common on Calgary Roofs
Two-ply SBS modified bitumen has been a mainstay on Calgary commercial and multi-family roofs for decades. The rubber-modified asphalt stays flexible in the cold, and two layers give built-in redundancy against the hail, foot traffic and freeze-thaw cycles our roofs see every year.
- Redundancy: a base sheet and cap sheet mean a single puncture rarely becomes a leak.
- Hail and traffic: the thick granulated cap sheet resists impact and handles rooftop mechanical service traffic well.
- Cold-season installs: torch-applied SBS can be installed in colder weather than many adhesive-set systems.
- Fire safety: torching near wood decks, parapets and occupied spaces calls for torch-safe details, a fire watch, or a cold-applied or self-adhered sheet in those areas.
Want a lighter single-ply system with welded seams? Compare TPO roofing. Replacing an old tar-and-gravel roof? See how SBS compares with built-up roofing (BUR), or book a free roof assessment.