Detail for 2 joists running flush against each other. 1 exterior, 1 interior
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Replies
So you're saying that the outermost joist of the house runs parallel to this wall where the porch will be, and the porch joists will also run parallel to the wall?
You wonder correct.
The inside of the house is inside.
The porch is outside of the house.
Keep the separation.
How will you tie them together?
I'd recommend some type of bolts, and just put a couple of fender washers between the members to keep them seperated by about 1/4-inch.
Treat it like a deck, flashing over the cabin joists, space the porch ledger out from the cabin joist about 3/8" or so with some pressure treated lumber or spacers of your choice.
one more thing........
One addition to what Mark and Jigs said......
I would flash over the ledger as well.