I have a flat roof, the contractor wants to use 1.5" polyiso foamboard
over the bare wood deck, I know the benefit of added insulation. But
since the foamboard compresses when walked on, wont this ruin the
roofing early in its lfe cycle since as the rubber roof ages and
hardens, walking on it will likely ruin and crack it as the foamboard
compresses? What is the best way to do this. He wants to use US ply
Duraweld APP polyester reinforced roofing. Is this the best roll
roofing you can get?