Closed cell foam trapping moisture in old rafters
Why it happens here
Older properties around Plympton St Maurice have solid stone walls and old timber rafters that need to breathe. Closed cell foam sprayed directly onto the wood seals in moisture, and the damp climate near the moors makes it worse. Over time the timber starts to decay.
Our approach
We use dry ice blasting to remove the foam without damaging the old timbers, then treat any decay we find. We also check the ventilation path so the roof can dry out properly once the foam is gone.