Torch Roofing
Heat-welded thermal seal for low-slope roofs — a monolithic, waterproof envelope.
Heat-welded thermal seal for low-slope roofs.
Two-ply SBS-modified bitumen system torch-applied for a monolithic, waterproof envelope. The propane torch melts the underside asphalt, chemically fusing the membrane to the substrate — no seams, no gaps.
- Membrane
- SBS 180 g/m² polyester
- Thickness
- 4 mm cap sheet
- Service life
- 20 – 25 years
- Slope
- 1/4:12 minimum
REF · 05DWG-R01
Technical Comparison
Torch Roofing vs. Standard Roofing
The propane torch melts the underside of the SBS-modified bitumen membrane, chemically bonding it to the substrate. The result is a single, continuous waterproof envelope — no overlaps, no sealants, no failure points.
| Specification | SYS-01 Torch-Down | SYS-02 Standard Asphalt |
|---|---|---|
| Sealing method | Heat-fused monolithic bond | Mechanical fasteners + adhesive |
| Seam integrity | Chemically welded, no cold joints | Overlapped, sealant-dependent |
| Slope requirement | 1/4:12 minimum (near-flat) | 4:12 minimum |
| Service life | 20 – 25 years | 15 – 20 years |
| UV resistance | Mineral granule cap sheet | Asphalt granules |
| Water penetration | 0 mm — seams disappear | Risk at every overlap |
| Ideal use | Flat commercial, garage, additions | Sloped residential roofs |
Zero cold joints
Waterproof over ponding
Faster crew install
Handles thermal expansion
Reference · Low-Slope Roofing
Where torch-down actually goes
Reference photos of two-ply SBS modified-bitumen roofs — commercial rooftops with HVAC, parapet-to-membrane detailing, and low-slope residential garages.