Closed cell foam trapping moisture in roof timbers
Why it happens here
Closed cell spray foam is dense and does not let moisture pass through. In a Netherton cottage, moisture from the living space rises into the loft and gets trapped against the rafters. Over time, that causes rot and roof rafter damage.
Our approach
We use thermal imaging cameras to find where the moisture is trapped, then remove the foam with dry ice blasting so we do not damage the timbers. We dry the structure and check for rot before we finish.