Could an expanding spray foam be used? I believe that will work ... that should be used during the wash to do a good job of removal? Is there some kind of product that might be applied after ...

With winter coming, I'd like to seal the hole up. Spray foam insulation seems like the easy solution, but I had a concern I might want to remove it in case something else had to get run there ...

Despite the growing popularity of spray foam insulation, there are no industry standards for its removal. The Marketplace investigation discovered that when contractors fail to address problems ...