When deciding on a new roofing system for your residential or commercial property, durability and longevity are most likely at the forefront of your mind. As they should be. Roofs undergo a lot of stress: extreme temperature changes, high winds, hail, rain, and more. Therefore, your roof needs to be able to handle it all.
With so many roofing options available in 2026, it’s tough to settle on just one. However, when looking for a roof that is waterproof, strong, and long-lasting, especially in the Lower Mainland’s wet climate, torch-on roofs remain one of the most reliable choices.
But what exactly is a torch-on roof, and how long will it last? Keep reading to find out…
What is Torch-On Roofing?
Torch-on roofing, also known as torch-down roofing, continues to increase in popularity, especially for commercial buildings and multi-family residential properties.
This system is made of polyester and fibreglass reinforced with an SBS (Styrene-Butadiene-Styrene) modified bitumen membrane. These base materials are heat-fused together with a propane torch, forming a thick, waterproof membrane that adheres securely to your roof deck.
In 2026, most high-performance torch-on systems are installed as 2-ply or 3-ply assemblies for added durability and extended lifespan.
This durable, cost-effective solution is:
- Waterproof
- Resistant to ultraviolet light
- Flexible to temperature changes
- Ideal for BC’s West Coast climate
Torch-on roofing is a popular choice for flat or low-sloping roofs where snow, ice, water, and debris can easily collect and sit for extended periods. Covering the entire roof surface seamlessly is one of the best ways to prevent leaks and structural damage to your commercial building.
It offers superior weather resistance compared to older systems such as traditional tar and gravel.
How Long Does Torch-On Roofing Last?
Now for the big question: what is the life expectancy of a torch-on roof? A professionally installed 2-ply torch-on roofing system typically lasts:
20–30 years
High-quality 3-ply systems may last even longer with proper maintenance. While torch-on roofing requires relatively minimal maintenance, the better you take care of your roof, the longer it will perform effectively. Annual inspections are strongly recommended in Metro Vancouver due to heavy rainfall and debris accumulation.
Torch-On Roof Lifespan Overview
| System Type | Average Lifespan | Maintenance Level |
| 2-Ply Torch-On | 20–25 years | Moderate |
| 3-Ply Torch-On | 25–30+ years | Moderate |
| Poorly Maintained System | 15–20 years | High repair risk |
Factors That Affect Torch-On Roof Longevity
- Quality of installation
- Number of plies installed
- Roof drainage performance
- Frequency of inspections
- UV exposure
- Foot traffic on the roof
- Debris buildup
- Ventilation and insulation beneath the membrane
- Proper drainage remains one of the most critical factors in extending the life of a torch-on roof.
Why Choose Torch-On?
Since there are many roofing systems available, it’s important to consider which one best suits your property’s needs.
Here are some advantages of choosing torch-on roofing:
1. Waterproof
Burnaby and Metro Vancouver are prone to heavy rain. A waterproof roofing system is essential.
- Torch-on roofing systems provide exceptional waterproofing due to:
- Seam-sealed membrane layers
- Heat-fused adhesion
- Continuous surface coverage
- Reinforced flashing details
When properly installed, this system creates a watertight barrier that protects against pooling water. However, installation quality is critical. Faulty installation can lead to premature leaks and membrane failure. Choosing an experienced roofing contractor ensures long-term performance.
2. UV Protection
Although BC is known for rain, summer UV exposure can still degrade roofing materials. Modern SBS torch-on membranes include:
- UV-resistant granulated cap sheets
- Reflective surfacing options
- Improved polymer flexibility
These features help regulate internal building temperatures and reduce heat absorption.
3. Durable
One of the greatest attributes of a torch-on roofing system is its durability. The multilayer membrane, fused with high heat, creates a tear-resistant and puncture-resistant surface. It performs well against:
- Wind uplift
- Light foot traffic
- Temperature fluctuations
- Minor impacts
That said, even durable systems require occasional inspections.
Recommended Maintenance Checklist:
- Annual professional roof inspection
- Clearing drains and scuppers
- Removing debris buildup
- Checking flashing and seams
- Inspecting for punctures after storms
Minor maintenance checks significantly increase lifespan and reduce major repair costs.
4. Skylight Friendly
Natural light remains a popular feature in commercial and residential buildings. Torch-on membranes can be easily modified and flashed properly around:
- Skylights
- HVAC units
- Roof vents
- Solar panel mounts
This flexibility makes torch-on roofing practical for future upgrades and renovations.
What’s Next?
Canuck Roofing specializes in installing, maintaining, and repairing torch-on roofing systems throughout Vancouver and the Lower Mainland.
If you’re looking for a durable, long-lasting, and weather-resistant roofing solution for your commercial or low-slope property, torch-on roofing remains one of the most dependable systems available.
Reach out today for a free consultation on your new roofing system.