Fastening details – deck ledger to insulated slab
I am designing an insulated Monolithic Slab. I plan to install 4″ of Roxul comfort board beneath and around the perimeter of the slab.
Does anyone have experience attaching a deck ledger to a slab (or stem wall) that is insulated with Roxul? Or is it advisable to place a higher density product beneath the ledger to avoid compression which may happen with the Roxul Comfortboard?
What type of fasteners are recommended for this application? Would a standard wedge type concrete fastener like a red head work?
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