I-M Roofing Ltd. installs, repairs, and replaces flat and low-slope roofing in Surrey, BC for both residential and commercial properties. We work with all three major flat roofing systems — TPO membrane, EPDM rubber, and torch-on modified bitumen — and help you choose the right system based on your building, budget, and long-term goals.
Free flat roofing estimate: 236-838-9577
Flat Roofing Systems We Install in Surrey BC
| System | Best For | Cost (Surrey) | Lifespan |
|---|---|---|---|
| TPO (Thermoplastic Polyolefin) | Commercial, energy efficiency priority | $8,000 – $18,000 | 20–30 years |
| EPDM (Rubber roofing) | Residential flat sections, cost-effective | $7,000 – $15,000 | 20–30 years |
| Torch-On Modified Bitumen | Proven system, residential and commercial | $8,000 – $16,000 | 20–25 years |
TPO vs. EPDM vs. Torch-On — Which Flat Roof is Right for Your Surrey Property?
Choose TPO when: energy efficiency is a priority (white reflective surface reduces cooling loads); you have a commercial building or large residential flat section; you want the strongest seam bond (heat-welded seams are stronger than the membrane itself); long-term warranty is important.
Choose EPDM when: budget is the primary concern; the flat section is smaller (residential garage, porch, or addition roof); your building doesn’t have significant cooling loads where the reflective white TPO makes a meaningful difference; proven 30-year track record in wet climates is valued.
Choose Torch-On when: you’re in an older building where the existing system is torch-on and a like-for-like replacement is appropriate; multi-ply coverage (base sheet + cap sheet) is preferred; or the contractor is most experienced with this system in your specific application.
See our full comparison: Flat Roofing Surrey BC Guide.
Common Flat Roof Problems in Surrey BC
- Ponding water — standing water after rain indicates insufficient slope or blocked drains. Surrey’s heavy rainfall amplifies this problem. Should drain within 48 hours of last rainfall.
- Membrane seam failures — most common in older torch-on systems where seams have separated; also in EPDM where lap adhesive has dried out
- Drain surround failures — the membrane lifting around the drain fitting; creates a funnel for water to enter the building assembly
- Blistering — trapped moisture between membrane layers causes bubbles; a sign of moisture in the system that needs investigation
- Punctures from foot traffic or debris — particularly common on rooftop deck areas and commercial properties with rooftop HVAC access
Our Flat Roofing Guarantee
- ✅ BCHPL-licensed General Contractor
- ✅ WCB-covered crew
- ✅ $2M general liability
- ✅ 10-year workmanship warranty on all new flat roof installations
- ✅ Manufacturer membrane warranty (varies by system)
- ✅ City of Surrey permits handled
Call for a free flat roofing estimate: 236-838-9577
