How To Torch On Roofing Felt

Torch on roofing or torch down roofing as it is also known is a flat roof covering solution that involves three layers of modified bitumen felt melt welded onto the roof surface and each other with the use of a blowtorch to create an impenetrable waterproof seal.

How to torch on roofing felt.

The correct process for a built up torch on felt system should comprise of 3 layers one base layer manually fixed to the roof usually nailed followed by one torch on underlay with the top finished with a torch on mineral cap layer. At the gutter edge should be what s known as a welted drip edge. As it is rolled out the roofing professional will use a torch to heat the bottom of the cap to the top of the base sheet. This video walks you through the steps in installing and torching felt drips on a roof and making sure it sticks well to avoid water getting underneath.

The top membrane sheet to a torch down roofing system is a smooth cap sheet. In a two layer torch down roof the system is complete at this point. To apply the primer hold the spray nozzle about 6 in 15 cm above the flashing. This will help you get started and you will also learn some tricks.

Check the label on the primer before purchasing it. Move the nozzle across the flashing to coat them in an even opaque layer of primer. When the two layers are pressed together they form a seal.