Trapped moisture causing rot in rafters
Why it happens here
Waterloo's hillside position means roofs face driving rain and cold winds. When spray foam is applied directly to rafters, it seals the timber and stops it breathing. Moisture from inside the home condenses against the cold rafters and cannot escape, so rot sets in over time.
Our approach
We remove the foam, inspect the rafters for rot and treat any affected timber. We then fit a vapour barrier and air sealing membrane to control moisture properly, so the roof space stays dry without sealing the timber again.