This will help you get started and you will also learn some tricks.
How to torch on roofing felt.
Make sure you choose something compatible with torch down roofing.
You will also find liquid primers.
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.
To apply the primer hold the spray nozzle about 6 in 15 cm above the flashing.
The top membrane sheet to a torch down roofing system is a smooth cap 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.
Move the nozzle across the flashing to coat them in an even opaque layer of primer.
Watch this video if you want to learn how to use a propane torch on a flat roof.
Check the label on the primer before purchasing it.
When the two layers are pressed together they form a seal.
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.