Why Use Torch-On Waterproofing On Your Flat Roof?

19 April 2022

Eugene Vargas

The materials you use on your flat roof affect how well you waterproof the space. While all membranes have some waterproofing capabilities, torch-on products have some extra benefits over other options.

How does torch-on waterproofing work? Why should you use it?

How Does Torch-On Waterproofing Work?

Torch-on waterproofing uses a couple of different materials to cover and waterproof a flat roof. To start, you lay down a specialist felt layer. You then cover the felt with a layer of asphalt bitumen.

At this stage, the two layers are separate. To bond them, you use a torch to heat the bitumen. As it heats up and melts, it sticks to the underlying felt layer. The two layers then bond together in a heat weld.

In some cases, you only use one layer of a felt and bitumen mix. In others, you can create multiple layers. They also bond together when you apply heat to them.

What Are The Advantages Of Torch-On Waterproofing?

Some flat roof waterproofing membranes do a good job at the start. However, if you have to cut sheets to stick them all together to cover the whole roof, then you might run into problems down the line.

Seams become weak areas in your roof's waterproofing. They might stick together strongly at the start; however, over time, they might start to come apart. Their adhesive might dry out or wear off. The seams will start to lift, leaving gaps under them.

In some cases, seams are also affected by changes in the weather. They might become brittle in the sun and start to curl up. Or, they might crack after a cold snap when the weather warms up again.

When these things happen, water can easily run into and under the seams. Your roof won't be fully waterproofed any longer. If water gets under the rest of your roof, then it won't just damage your roofing. It can also cause internal damage if it passes through into your building.

Torch-on waterproofing works more effectively for longer. You basically weld the membranes you lay together to create a watertight and completely bonded surface layer. You don't have seams on the top of the surface. Your roof will stay intact for longer.

Plus, you can also layer up torch-on waterproofing if you want extra protection. If you use more than one layer, then you create a thicker and stronger roof. As well as staying waterproofed for longer, your roof is less likely to get damaged. You won't have as much maintenance or repair work to do on it.

To find out more about torch-on membranes and their benefits, contact waterproofing contractors.

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