Roof rot from foam trapping moisture against felt
Why it happens here
Spray foam applied directly to roof felt blocks the airflow that keeps a roof dry. In Shirley's older homes, the felt is often already fragile, so trapped moisture speeds up rot. The problem is worse on north-facing roofs that get less sun.
Our approach
We remove the foam carefully, inspect the felt and timbers, and restore ventilation. Where rot has started, we treat or replace affected timber before closing up. We also advise on ventilation improvements to stop it happening again.