Trapped moisture causing rot in roof timbers
Why it happens here
Foam sprayed directly onto old felt seals the roof completely. In Walcot's Victorian terraces, there is often no ventilation path at all. Moisture from the house rises into the loft and has nowhere to go, so it condenses on timbers and eventually causes rot.
Our approach
We remove the foam and immediately check every rafter with a moisture meter. If rot is present, we treat or replace the affected timber before fitting internal vents to restore airflow. You get before-and-after readings so you can see the improvement.