Torch-on roofing is one of the most reliable ways to protect flat and low-slope roofs from water infiltration, harsh weather, and long-term wear. If you’re searching for durable, leak-proof, and professional torch-on roofing installation in Surrey, BC, you’re in the right place. At I-M Roofing Ltd, we deliver high-performance torch-on systems designed to last—perfect for residential, commercial, and industrial buildings needing maximum protection.
Property owners searching for torch-on roofing want long-lasting waterproofing, strong membrane protection, and professional installation that eliminates leaks for years. Our Surrey-based roofing experts specialize in torch-on systems engineered to withstand BC’s heavy rainfall, temperature variations, and seasonal moisture. Whether you need new installation, replacement, or repairs, we offer premium-quality work that ensures your roof remains safe and secure.
Torch-on roofs are known for their exceptional resilience—and when installed by certified professionals, they can easily last 20–30 years with minimal maintenance. That’s the kind of long-term security we deliver.
Torch-on roofing is one of the top choices for Surrey property owners because of its advanced waterproofing and durability. Here’s what makes it stand out:
Torch-on roofing is designed to create a completely sealed, watertight membrane—ideal for BC’s rainy climate. The heat-applied layers fuse together and eliminate the gaps traditional roofing systems may have.
Thanks to its thick bitumen layers, torch-on roofing is highly resistant to UV rays, standing water, heat, cold, and mechanical damage.
High-performance torch-on membranes include fire-resistant properties, adding an extra layer of safety.
Unlike shingles, torch-on systems are specifically engineered for low-pitch surfaces.
At I-M Roofing Ltd, we follow a structured and safety-focused approach to ensure flawless torch-on installation:
We begin with a detailed inspection to evaluate roof conditions, existing layers, and any moisture or structural issues.
We remove old roofing materials if required, clean the surface, and repair any damage or irregularities.
A primer is applied followed by the installation of the base membrane, ensuring proper adhesion.
The top sheet is carefully torched and fused to the base layer, forming a seamless, watertight barrier.
We reinforce edges, seams, and vulnerable areas for maximum durability and leak protection.
Every project undergoes a full inspection to guarantee long-term performance and safety.
Specialized expertise in flat and low-slope roofing
Certified and insured torch-on installers
High-quality membranes designed for BC’s wet climate
Attention to detail in sealing seams and vulnerable areas
Fast, safe, and clean installation
Competitive pricing with long-term value
Local Surrey roofing professionals you can trust
We deliver torch-on roofing solutions that protect your property today — and stand strong for decades.
Whether you need installation, replacement, or repairs, our experts are here to help. Get long-lasting protection with a roofing system built for BC’s climate.
Call us today or request a free estimate — your roof deserves the best.
Torch-on roofing is the most durable flat roof system available. It is thick, waterproof, and can handle foot traffic, ponding water, and freeze-thaw cycles.
If you have a flat or low-slope roof in Surrey, torch-on is a proven solution. It has been used on flat roofs for decades. It works.
I am Maninder Singh. I have installed over 150 torch-on roofs in Surrey since 2012. I have seen torch-on roofs last 25+ years with proper maintenance. This page tells you everything: what it is, how it compares to other systems, costs, and the installation process.
Call 236-838-9577 for a free torch-on roofing quote. We serve all Surrey flat roofs.
Torch-on roofing is a modified bitumen roofing system. It is made from asphalt with polymer modifiers (APP or SBS) that make it flexible and durable.
The installation method gives it its name: the membrane is heated with a torch flame and adhered to the roof deck. The heat softens the bitumen, creating a watertight seal.
Torch-on is not just asphalt.
APP (Atactic Polypropylene): A plastic modifier that adds heat resistance
SBS (Styrene-Butadiene-Styrene): A rubber modifier that adds flexibility at low temperatures
For Surrey’s climate, SBS-modified torch-on is the better choice. It handles freeze-thaw cycles without cracking.
Three main systems are used on flat roofs in Surrey. Here is how they compare.
| Factor | Torch-On | TPO | EPDM |
|---|---|---|---|
| Material | Modified bitumen | Thermoplastic polyolefin | Rubber (ethylene propylene diene monomer) |
| Lifespan in Surrey | 20-25 years | 20-30 years | 20-30 years |
| Cost per square | $450 to $750 | $400 to $700 | $350 to $600 |
| Installation | Torch-applied (heat welded) | Heat-welded seams | Glued or mechanically fastened |
| Durability | Excellent (thick, puncture resistant) | Good (puncture resistant) | Good (flexible, easy to repair) |
| Foot traffic | Excellent (handles foot traffic well) | Moderate | Moderate |
| Ponding water | Excellent (thick membrane handles standing water) | Good | Excellent (rubber handles ponding water) |
| Repairs | Easy (torch on patch) | Moderate (requires heat welding) | Easy (rubber patch) |
| Maintenance | Low | Low | Low |
| Best for | High-traffic roofs, strata buildings | Energy-conscious buildings | Budget-conscious projects |
When to choose torch-on:
Your flat roof has foot traffic (HVAC workers, maintenance)
You want maximum durability
Your roof has ponding water issues
You are on a strata council (durability matters)
When to choose TPO:
You want energy efficiency (white reflective surface)
Your roof is visible and appearance matters
You want a modern system
When to choose EPDM:
You are on a tight budget
Your roof has complex details and penetrations
You want a simple, proven system
Not sure which flat roof system is right for you? Call 236-838-9577. We will assess your roof and recommend the best option.
Torch-on roofing costs $450 to $750 per square (100 sq ft) for most Surrey flat roofs.
| Roof Area | Typical Cost Range |
|---|---|
| 1,000 sq ft (small flat roof) | $4,500 to $7,500 |
| 1,500 sq ft (addition or townhouse) | $6,750 to $11,250 |
| 2,000 sq ft (garage or workshop) | $9,000 to $15,000 |
| 2,500 sq ft (flat roof home) | $11,250 to $18,750 |
| 5,000 sq ft (commercial) | $22,500 to $37,500 |
What affects the price:
Number of layers (2-ply vs 3-ply system)
Existing roof removal ($1,500-$4,000)
Insulation replacement ($500-$2,000)
Roof complexity (curbs, vents, drains, parapet walls)
Building height (scaffolding costs)
2-ply system: Base sheet + cap sheet. Cost: $450 to $600 per square.
3-ply system: Base sheet + mid-ply + cap sheet. Cost: $600 to $750 per square.
The 3-ply system is more durable and recommended for Surrey’s climate.
Every roof is different. Call 236-838-9577 for a quote specific to your flat roof.
Torch-on roofs last 20 to 25 years in Surrey’s climate with proper installation and maintenance.
| Factor | Impact on Torch-On Roof |
|---|---|
| Heavy rain (1,200-1,600mm/year) | Torch-on sheds water well. Proper slope is critical. |
| Ponding water | Torch-on handles standing water better than most systems. |
| Freeze-thaw cycles (40-60 per year) | SBS-modified torch-on flexes with temperature changes. No cracking. |
| Foot traffic | Torch-on is durable. HVAC maintenance does not damage it. |
| UV exposure | Granulated cap sheets protect against UV. Smooth cap sheets need reflective coating. |
What eventually fails on a torch-on roof:
Seams (if not properly torched)
Flashings (around curbs, vents, parapet walls)
Blistering (from moisture trapped during installation)
Granule loss (on cap sheet over time)
With proper maintenance, a 3-ply torch-on roof can last 25+ years in Surrey.
Step 1: Free quote
We inspect your flat roof. We check the deck, insulation, flashings, and drains. We give you a fixed price.
Step 2: Material selection
You choose 2-ply or 3-ply system. You choose granulated or smooth cap sheet. You choose color (if using reflective coating).
Step 3: Site preparation
We protect your property. We set up safety equipment. We post signs if needed.
Step 4: Roof removal (if applicable)
We remove existing roof layers. We inspect the deck. We photograph everything.
Step 5: Deck and insulation repair (if needed)
We replace damaged decking or insulation. You approve the cost before we start.
Step 6: Base sheet installation
We install the base sheet using cold adhesive or mechanical fasteners. This creates a smooth surface for the cap sheet.
Step 7: Cap sheet installation (torch application)
We unroll the cap sheet. We use a torch to heat the bitumen. We adhere it to the base sheet. We overlap seams by 4-6 inches. We torch the seams for a watertight seal.
Step 8: Flashings and details
We install torch-on flashings around all curbs, vents, drains, and parapet walls. This is the most critical part of installation.
Step 9: Final inspection
We inspect all seams, flashings, and drains. We perform a water test. We ensure the roof is watertight.
Step 10: Cleanup and walkthrough
We clean the site. We walk the roof with you. We answer all questions.
Step 11: Warranty
You receive manufacturer warranty and our 10-year workmanship warranty.
Pros:
Thick, durable membrane
Excellent puncture resistance
Handles foot traffic well
Excellent for ponding water
3-ply system adds redundancy
Cons:
Requires flame application (fire risk on some buildings)
Heavier than TPO and EPDM
Dark color absorbs heat (unless coated)
More expensive than EPDM
Best for: High-traffic roofs, strata buildings, commercial roofs, 1970s-1990s homes with flat roof additions
Pros:
Energy efficient (white reflective surface)
Heat-welded seams (stronger than glued)
Lighter weight than torch-on
Good puncture resistance
Cons:
Requires professional installation
Sensitive to oils and solvents
Not as durable as torch-on for foot traffic
Best for: Office buildings, strip malls, energy-conscious owners
Pros:
Most affordable flat roof option
Flexible (handles building movement)
Easy to repair (rubber patches)
Excellent for ponding water
Cons:
Dark color absorbs heat (unless coated)
Seams are glued (can fail over time)
Less puncture resistant than torch-on
Best for: Budget-conscious projects, extensions, apartment buildings
1. Is torch-on roofing better than TPO for flat roofs?
Torch-on is better for durability, foot traffic, and ponding water. TPO is better for energy efficiency and appearance. The best choice depends on your specific roof and priorities.
2. How long does a torch-on roof last in Surrey?
20 to 25 years with proper installation and maintenance. 3-ply systems last longer than 2-ply systems.
3. Is torch-on roofing safe for residential homes?
Yes, with proper safety precautions. Torch-on is commonly used on residential flat roofs in Surrey. Our team is fully trained in fire safety and uses fire extinguishers during installation.
4. How do I maintain a torch-on roof?
Annual inspections. Clear debris from drains. Check flashings for cracks. Repair any blisters or damaged areas immediately. We offer commercial and residential maintenance programs.
5. Can I walk on a torch-on roof?
Yes. Torch-on is durable and handles foot traffic well. Granulated cap sheets provide good traction. Smooth cap sheets can be slippery when wet.
6. Does torch-on roofing come with a warranty?
Yes. 20-25 year manufacturer warranty on the membrane. 10-year workmanship warranty from Imroofs.
We specialize in flat roofs. We understand torch-on installation.
10-year workmanship warranty
2-ply and 3-ply systems available
APP and SBS modified options
Granulated and smooth cap sheets
Fully trained and certified torch-on installers
Fire safety equipment on every job
Licensed, insured, WCB compliant
Locally owned and operated since 2012
Torch-on is the most durable flat roof system for Surrey’s climate. It handles foot traffic, ponding water, and freeze-thaw cycles.
Call 236-838-9577 for a free torch-on roofing quote. We serve all Surrey flat roofs: residential, commercial, strata, and multi-family.
Imroofs – torch-on roofing specialists. 3-ply systems. 10-year warranty. Free quotes. Licensed and insured.
I-M Roofing Ltd — Delivering durable, high-quality roofing solutions designed to protect and impress.
