Torch-On Roofing in Langley & the Lower Mainland

What is torch-on roofing?

Torch-on roofing is a 2-ply modified bitumen system installed by heat-welding rolls of asphalt membrane to the roof deck and to each other. The result is a fully adhered, redundant waterproofing system built for flat and low-slope roofs.

Why torch-on works for BC flat and low-slope roofs

Modified bitumen stays flexible across a wide temperature range and stands up to the long wet seasons of the Lower Mainland. Two plies give you built-in redundancy — if the top layer takes damage, the base ply still holds water out.

Common torch-on roof problems

Most problems aren't in the field of the membrane — they're at seams, flashings, drains, and penetrations. Poor prep, cold seams, and missing details cause the majority of leaks we're called out to fix.

• Cold or under-heated seams
• Cracked or lifted flashings
• Bad drain and scupper details
• Ponding water from poor slope
• Skylight and vent leaks
• Parapet cap failures

Torch-on roof repair

Targeted torch-on repair — patching seams, rebuilding flashings, replacing sections around penetrations — can add years to an otherwise sound roof. We photograph the failure and explain what we're doing before we do it.

Torch-on roof replacement

When repairs stop making sense, a full 2-ply torch-on replacement gives you a fresh 20–30 year system when installed correctly. We handle tear-off, deck repair, insulation, membrane, and all detail work.

Commercial torch-on roofing

Warehouses, retail buildings, multi-family, and strata roofs. We work with owners, property managers, and councils to plan staged work that minimizes tenant disruption.

Residential flat roof torch-on systems

Additions, garages, shop roofs, and flat sections on residential homes — torch-on is often the best long-term option when it's installed with proper attention to details.

Drainage, flashing, seams, and details matter

The single biggest predictor of a torch-on roof's lifespan isn't the brand of membrane — it's whether the crew took the time to detail seams, flashings, and drainage properly. That's where 30+ years of hands-on experience pays off.

Why choose Roofking

Family-run, local, and specialized in torch-on. The owner has 30+ years of hands-on experience with modified bitumen systems across the Lower Mainland. You deal with roofers, not a call center.