Foam trapping condensation against roof timbers
Why it happens here
Dyke House is close to the coast, so the air is damp year round. Foam sprayed directly onto felt seals the roof and stops it breathing. Moisture condenses on the cold side of the foam and soaks into the rafters.
Our approach
We remove the foam, inspect and treat any rot, and leave the void ventilated. Our insulation assessment recommends a breathable alternative rather than a repeat of the same mistake.