What type of fasteners in a thick roof deck?
Come spring I plan to rip off my roof and add 3 layers of 2 inch foam insulation and then re deck it. I plan to use 2 x 6's at the eave with some plywood to equal the 2" foam.
My question is what kind of fastener should I use to hold the decking to the lower decking/rafters 6 "s + below? Timbermates? Ledgerlocks? 8" screws?
Also what kind of fastener schedule should be used? I am worried of the fastener bending with time.
BTW, 8 pitch roof, soutnern WI, architectural shingles, not planning to vent it.