If you own a home or commercial building in Victoria with a flat or low-slope roof, choosing the right roofing system is critical. Between heavy winter rain, coastal moisture, and seasonal temperature changes, your roof needs to handle more than just basic weather exposure.
That’s where torch-on roofing stands out.
At Shoreline Roofing, we install high-quality torch-on roofing systems designed specifically for Vancouver Island’s coastal climate. In this article, we’ll explain what torch-on roofing is, how it works, and why it’s one of the most durable flat roofing options available.
What Is Torch-On Roofing?
Torch-on roofing (also known as modified bitumen roofing) is a multi-layer membrane system applied using heat to create a seamless, watertight seal.
It typically includes:
A base sheet
A cap sheet (granulated top layer)
Reinforced waterproof membrane
Heat-welded seams for full adhesion
The result is a durable, flexible, and highly waterproof surface ideal for:
Flat roofs
Low-slope roofs
Garages
Commercial buildings
Condo and strata properties
Why Torch-On Roofing Is Ideal for Victoria’s Climate
Victoria’s climate presents unique roofing challenges:
Extended rainy seasons
Salt air exposure
Moss growth
Freeze–thaw cycles
High winds during winter storms
Torch-on roofing performs exceptionally well in these conditions.
1. Superior Waterproofing
Unlike traditional rolled roofing or aging tar-and-gravel systems, torch-on membranes are heat-sealed, eliminating gaps where water can penetrate. This creates a continuous waterproof barrier.
2. Long Lifespan
A professionally installed torch-on roof can last 20–30 years with proper maintenance.
3. UV & Weather Resistance
The granulated cap sheet reflects UV rays and resists cracking, which is especially important during dry summer months.
4. Low Maintenance
Compared to older flat roofing systems, torch-on requires minimal upkeep and handles pooling water better.
Signs You May Need a Torch-On Roof Replacement
If your property has a flat or low-slope roof, watch for these warning signs:
Blistering or bubbling
Cracked or brittle membrane
Pooling water that doesn’t drain
Interior ceiling stains
Soft spots when walking on the roof
Moss buildup at seams
Early replacement prevents costly structural damage.
Torch-On Roofing vs. Other Flat Roofing Options
| Roofing Type | Lifespan | Waterproofing | Cost | Best For |
|---|---|---|---|---|
| Torch-On | 20–30 yrs | Excellent | Moderate | Residential & Commercial |
| Tar & Gravel | 15–20 yrs | Good | Moderate | Older buildings |
| EPDM Rubber | 15–25 yrs | Good | Moderate | Mild climates |
| TPO | 15–25 yrs | Very Good | Moderate–High | Commercial |
For coastal BC, torch-on remains one of the most reliable long-term investments.
Professional Installation Matters
Torch-on roofing requires:
Certified installers
Proper ventilation
Fire-safe installation practices
Correct seam welding
Proper flashing integration
Improper installation can lead to premature failure. That’s why it’s important to work with experienced local roofing professionals who understand Victoria’s weather patterns and building requirements.
Is Torch-On Roofing Right for Your Property?
Torch-on is ideal if you:
✔ Have a flat or low-slope roof
✔ Want long-term waterproof protection
✔ Are replacing an aging tar-and-gravel roof
✔ Need a durable system for heavy rain
✔ Own a commercial or strata building
Get a Professional Roof Assessment
If you’re unsure about the condition of your flat roof, a professional inspection can help determine whether repair or replacement is the better option.
At Shoreline Roofing, we specialize in durable flat roofing solutions designed for coastal British Columbia conditions.
Need a Torch-On Roofing Estimate in Victoria?
Contact Shoreline Roofing today for a professional roof inspection and honest recommendations.
Protect your home. Protect your investment. Install it right the first time.