Foam trapping condensation against roofing felt
Why it happens here
Jesmond's older roofs were built to breathe. Spray foam seals the underside of the felt, so moisture that would normally escape gets trapped and soaks into the timber instead. Coastal humidity makes it worse.
Our approach
We remove the foam, check the felt and battens, and advise on a breathable insulation system that lets the roof dry out naturally rather than sealing it again.