Porch Ledger Attachment with Exterior Rigid Foam
I’m wondering what techniques others have come up with to attach porch deck and roof ledgers to exteriors walls with 3″ to 4″ of rigid exterior foam. I suspect this is a question that begs for an engineer’s stamp but I would appreciate an overview of methods others have used to both attach a porch roof, for example, without compromising the thermal break provided by the 3″ to 4″ of foam. Perhaps one can through-bolt the ledger through the foam directly to the interior stud wall. I’m presuming the ledger would be directly against the exterior of the foam in the same plane as the 1×3 furring (rain screen). I’m guessing the frequency and method of through-bolting would reflect the attached load. Thanks for any responses.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part