My factory board is toast. Do you recommend 1/4" foam, then new heavy cardboard, then flag?
I think what he's saying is this:
From the metal roof downward it should be: board - foam - flag. The board is a bit rough, and since it has some cuts in it to allow it to be bent to fit the contours of the roof, these will show up in the final product unless you cover it with foam first.




