WRB and air seal for aged board sheathing
Gut reno of 100 yr old build in zone 5. Two of the four exterior walls had to be stripped of the cedar clapboards and tar paper, leaving only the board sheathing. See the corner of these two walls meeting in the pic.
We intend the assembly outboard of the sheathing to be a WRB, drainage gap, then back on with clapboards (no exterior insulation). Inboard of the sheathing we intend to use mineral wool, smart vapor retarder, and skim coated wall board.
We are at the point that we need to pick a WRB which we also hope to serve as the air barrier. Gaps in the sheathing are substantial! Appreciate some guidance in the selection.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part