Forums Chit Chat Roof – Foam torching Reply To: Roof – Foam torching July 12, 2018 at 1:01 pm #388 Sam W 3 Posts The foam was spotted by a (very good) roofer who I contacted as I was worried about the state of other areas of the roof. Fortunately, the areas with problems don’t have the foam torching and can be repaired relatively easily. It seems to boil down to, it’s not good, but not the end of the world. My guess is that the foam torched roof will last as long as we expect to be in the house (20 years), but will come up as an issue if and when we decide to sell.