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Torch-on Roofing for Moisture-free Roof in Lethbridge

Flat roofs require special care to stand the test of time. As your experienced roofing contractor in Lethbridge, T N R Roofing Ltd has the expertise and skills to offer an effective torch-on roofing process to keep your roof moisture-free. Don't hesitate to talk to our team if you have a flat roof or sloped roof and are looking for torch-on roofing experts.

What Is Torch-on Roofing?

Torch-on roofing, also known as flat roofing, is the key to ensure a well-maintained and long-lasting flat roof. It is a unique process to facilitate the best seal and waterproof finish in flat and sloped roofs. An open-flame propane torch is used to seal your roof against the exterior elements. Here is how it works:

An asphalt compound called bitumen is used to seal the roof
The bitumen is modified by adding rubber or plastic to increase its strength
The rubber in bitumen makes it easy to expand and contract
The material is heated to the point that it melts
It offers high tolerance to heat, cold, and moisture

Torch-on roofing is an effective method to make your roof water and weather-resistant. You can also opt for two-layer roofing or three-layer roofing for added protection.


As flat roofs are likely to hold water from rain and snow for a more extended time than sloped roofs, there are chances of damage. In such cases, torch-on roofing offers the protection your roof needs.

Components of Torch-on Roofing Systems

Insulation: It helps to retain heat in the building/structure

Vapour barrier: Applied after insulation, this barrier helps in keeping a check on the condensation and moisture problems

Overlay board: An overlay board is used to support the torch-on membrane, which helps in preventing water pooling

Base sheet: It is the first layer of modified bitumen applied on the roof

Cap sheet: This sheet is applied as the top sheet of the torch-on roofing

Flashing for penetrations: A self-adhering modified bitumen membrane is the material typically used for flashings

Why Torch-on Roofing?

Torch-on roofing acts as a shield for your flat or sloped roof. Here is how:

It makes your roof waterproof
It offers weather resistance
It offers resistance against heat
The cap sheet used in the process offers multiple benefits, including increased energy efficiency of the building, resistance against ultraviolet rays, keeping the building cool, and increased life expectancy of your roof

A torch-on roof is a perfect option if you are looking for a durable and long-lasting roof that offers protection against snow and other elements. Call the professionals at T N R Roofing Ltd to get your torch-on roof installed.

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