Roof rot from trapped moisture under foam
Why it happens here
Closed cell foam seals the loft completely. In Addiscombe's older roofs, there is no ventilation gap, so condensation forms on the underside of the felt and drips onto timber. Over three to five years, rafters soften and rot.
Our approach
We remove the foam, inspect every rafter with a thermal imaging camera, and treat or replace any rot. Then we restore eaves ventilation so the roof can breathe. We document the whole process for your records.