Foam trapping moisture against the roof felt
Why it happens here
Southdown's west-facing roofs take the worst of the weather, and foam sprayed directly onto felt blocks the ventilation that would normally let moisture escape. Over a few winters, that moisture sits against the timbers and starts to cause rot.
Our approach
We remove the foam in sections, check every rafter with a moisture meter and a boroscope inspection camera, and reopen the ventilation path so the roof can dry. If rot has started, we tell you exactly where and what needs treating.