I am looking to diagnose reasons why my first attempt at torch-down patching of my almost-flat roof (1/12) failed. I used this inexpensive torch fueled by a small, camping propane tank, for compactness and ease of transport to the roof:
To make a small patch around a fart fan roof vent using this material:
I couldn't get the other side (mating surface) of the material to melt and become adhesive, so it wouldn't stick. The environmental conditions were around 35°F and windy (probably 15 mph wind, which visibly interfered with the flame and was "sailing" the material as I was holding it with groove joint pliers). I did make sure the roof surface was dry.
Could it be because:
- Inadequate (cheap) torch
- Inadequate fuel tank (should have used 20 lb like for grilling, which would make it harder to get up on the roof)
- Environmental conditions (temp + wind)
- Lack of workman skill
- Something else?