Flashing tar paper WRB and sealing CCSF air barrier (Lunos install)
I’m installing a pair of Lunos e2 HRVs in a wall section like this:
– 1″ CCSF
– 1x plank sheathing
– tar paper
– transite siding
– thin layer of foam
– vinyl siding
So the tar paper is the water control layer, right? How do I flash this? My current plan is to use a ROFLEX 150 gasket, cut a slit in the tar paper, and tuck the top edge of the gasket under the tar paper while leaving the bottom edge on top. But how to do I keep water out of the slit? Roof seam tape? Black Jack? Or would Tescon Vana or foil duct sealing tape work? (Doesn’t look like that is an approved use, but I already have these).
For better or worse I think the CCSF is the air barrier (drywall was not detailed as such). The Lunos instructions would have me cut a hole leaving only 1/16″ around the tube. Should I go with that or cut a larger hole so I can push caulk into the gap in the sheathing and then add canned foam to the gap in the existing foam?
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