How To Use 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 use torch on roofing felt.

You will also find liquid primers. Taking the time to properly prepare the sheathing will make all the difference in how quickly and easily the felt paper is installed. When the two layers are pressed together they form a seal. Use a 4 inch 10 cm paintbrush or a roller to apply the paint or primer.

Move the nozzle across the flashing to coat them in an even opaque layer of primer. 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. Drag it gently from one end of the roof to the other east to west or west to east. Begin at the bottom working in horizontal lines and gradually moving upward.

At the gutter edge should be what s known as a welted drip edge. The top membrane sheet to a torch down roofing system is a smooth cap sheet. To apply the primer hold the spray nozzle about 6 in 15 cm above the flashing. Apply waterproof paint or primer to promote felt attachment.

Installing the roofing felt does take care but can go very quickly. In a two layer torch down roof the system is complete at this point. These thick layers of roofing felt are installed by heating the back of the felt with a butane torch and then carefully applying it to the roof. Make sure you choose something compatible with torch down roofing.