I’m replacing a 30 year old metal roof laid on 1/2 inch sheathing. This a gambrell roof with two dormers on one side and one larger dormer on the other.
The area I just stripped is a portion of the living room roof. While replacing the sheathing I’m looking at 3.5 inches of what I’d call blocks of styrofoam. These are laid on 24 inch centers. The beads making up the block are the size of bb’s. It takes a bit of effort, not much, to make the material crumble into individual bb’s. The material appears to be in good shape.
My question is:
Should I replace this styrofoam? Is there a more energy efficient material I could use?
I’m hoping for some replys tonight as I must keep working on the roof before the weather shuts me down.
Thanks your help!