Open cell foam trapping condensation in lofts
Why it happens here
Grange has a lot of 1930s and 1950s housing with original roof felt. Open cell foam sprayed directly onto the felt stops the roof breathing. Moisture from the house rises into the loft and gets trapped, causing damp and rot.
Our approach
We remove the foam with dry ice blasting, which leaves the timber dry and clean. Then we check the roof ventilation and, if needed, fit breathable felt or vents. We take moisture readings before and after to prove the timber is drying.