I'm in the process of buying a house that has been fitted with the spray foam. Having been warned of the risks by the survey I have had a roofer take a look and provide a quote for re-roofing (ie. strip existing tiles and roof boards, fit breathable felt, re-batten and re-tile).
The existing roof is unfelted with close-boarded (feather-edge) timbers and clay tiles, with foam on the interior. According to the owner the roof boards also had slots cut into them to allow the foam to bond to the tiles.
I've heard that stripping the foam off can be time consuming and expensive. Has anyone had any experience with re-roofing a house that has had spray-foam fitted? Do I need to make any allowance for extra costs?
The existing roof is unfelted with close-boarded (feather-edge) timbers and clay tiles, with foam on the interior. According to the owner the roof boards also had slots cut into them to allow the foam to bond to the tiles.
I've heard that stripping the foam off can be time consuming and expensive. Has anyone had any experience with re-roofing a house that has had spray-foam fitted? Do I need to make any allowance for extra costs?