Attic air sealing with tape?
I have a 1926 Cape in Seattle, WA (zone 4C) and the attic is in desperate need of insulation and air sealing (at least the half that I can reach). The ceiling and walls below are plaster and lathe and the insulation shows little darkening from the ceiling, just from the penetrations. The walls in the upstairs are drywall.
I know I have to crawl in there and air seal as much as I can before we add more insulation, but since this will already be a messy job, I’m hoping that I can use high quality tape instead of acoustical sealant. Does anyone have any comments on how well that sticks to wood or what I can do to improve the seal to wood? Does anyone just buy a roll of air barrier and run it all along the attic floor?
Thanks very much
PS. Yes, we have insulated ducts in there and yes, I’m looking to see what I can do to insulate the roof deck, but that has to wait until we know what kind of modifications to make to the roofline.
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