Closed cell foam trapping damp against roof felt
Why it happens here
Closed cell foam is impermeable, so moisture from inside the house cannot escape through the roof. In Owton Manor's older houses, the felt is often already aged and less breathable. The result is condensation collecting behind the foam.
Our approach
We remove the foam in sections, check the felt and timbers for damage, and leave the roof space open so it can dry out. If the felt needs replacing, we tell you before we finish.