How roof foam can come up during a sale and how a written report keeps things moving.
Buyers' surveyors look harder at lofts than they used to, and spray foam under the roof usually leads to extra questions.
Some want to know the foam type and the state of the rafters. A few lenders will not lend at all, so the buyer's broker is the person who knows how their lender treats it.
Photographs and moisture readings let solicitors and surveyors work from what was found, rather than trading emails about what might be there.
Related: Sale and remortgage roof report