Detailing Wall to Stem Wall Foundation
Hi all, Attached is my proposed detail for my wall and foundation. I am in Zone 3 (northern California), but shooting for a more energy efficient space. I would very much appreciate this community to review my detail, and comment away. Anything I’m missing? Anything you would do differently? Here are the questions I have: 1) My WRB is the Huber Zip Sheathing, but there is 1″ of polyiso foam. Does it make sense to also use the polyiso as an additional WRB for the approved tapes? 2) IF water was to get to the Zip WRB, I’m thinking I want to keep the bottom open. Even if tape the foam, shouldn’t I leave a gap at the concrete stem wall? 3) This is termite country. The foam will be exposed at the bottom albeit 14″ above grade. Should I be worried about termites and other insects? If so, how do I protect the foam AND allow the Zip WRB to drain? (Could this be solved by using a different type of rigid foam?) 4) My board and batten nails are ALL going though the foam and through the Zip sheathing. Huber says this is no problem. Should I be worried about all these penetrations in my water and air barrier? Thank you GBA community! I love this resource!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part