Originally Posted by RickT
My house is being resided and I'm planning on building a deck next spring. I thought that as long as the old siding is coming off, now might be a good time to install a ledger board. My house sheathing is 1" foam board, not OSB. Should I install the ledger board over the foam board, or should I cut the foam board away to expose my sill plate, install pressure treated 2x? ledger board to the sill plate? I was thinking that the foam board would compress and would never allow a solid enough installation of the ledger board, but I wanted to ask you guys.
RickT...your intuition is absolutely, 100 % right..... about the foam...
Install your ledger board onto your sill plate....
However, what we do is to make sure that the areas is water and moisture tight:
a.) The area of the sill plate and wall sheathing is covered with a water and ice shield membrane.
b.) Install spacers between the ledger and the sill plate to allow water and moisture run-off.
c.) Install proper aluminim (or other proper material) ... capped & bent ....over the ledger board....away from your house...