Trapped moisture causing roof timber rot
Why it happens here
Spray foam seals the roof space, stopping the ventilation that timber needs. In Livermead, south-west winds drive rain into roof voids, and the foam holds that moisture against the rafters. Over a few years, the timber starts to rot.
Our approach
We check timber moisture with a meter before we start, remove the foam with dry ice blasting, and treat any early rot. You get a photo record of the timber condition for your own records or a lender.