Foam trapping condensation against cold roof timbers
Why it happens here
Throston lofts are often shallow with limited ventilation, and foam sprayed directly onto the roof underside blocks the airflow that timber needs. Over a couple of damp winters, moisture builds up and rot starts in the rafters.
Our approach
We remove the foam in sections, then check every rafter with a moisture meter and boroscope. Where rot is found, we document it clearly so you know exactly what needs treating before the roof is closed up again.