Another post mentioned why we need to go up on the roofs. This is why we need to go into the attic.
Both
Was that you that nearly fell through the decking.
I had a restaurant a couple of week ago that had a slightly pitched roof from front to back that the only thing that kept me from falling through was the butyl rubber; deck was completely gone.
What is the gray material?
Charley,
Nope - I walked that part of the roof and didnt notice anything form the top side.
Joe,
Stained plywood, posibly the wrong grade