I'm looking into adding spray foam insulation under the roof deck of an older home. It would effectively seal off the attic space. I've seen some of the threads on here but don't think I have seen the following discussed.
Once the foam goes in under the decking, is it possible to tell if there is any damage to the decking, from a leak for example, without removing the roof covering? I see the benefit of the insulation but am wondering if it comes at a cost of missing a problem down the line with the roof.
Once the foam goes in under the decking, is it possible to tell if there is any damage to the decking, from a leak for example, without removing the roof covering? I see the benefit of the insulation but am wondering if it comes at a cost of missing a problem down the line with the roof.