Opinions on This Wall Assembly Plan
We’re renovating a 1985 house in Conway New Hampshire and the existing wall assembly is:
Sheet of Polythene directly under drywall
R-11 Fiberglass insulation with Kraft Facing
WRB – not sure on brand yet
Painted Cedar Shingles – that will be removed as part of renovation and probably replaced with LP Smart-side Lap and board and batten.
As part of the renovation we are reframing some of the exterior walls for new windows that are in different locations and different sizes. At most we are opening up 5-6 feet of wall space in a few different rooms.
Should we include the polythene and seal with acoustic caulk or leave it out? Use Kraft faced insulation or use unfaced? On one hand the walls that were opened up so far were nice and dry and looked good and so we think since we’re not opening all the walls, that we should stay consistent with existing assembly. On other hand, I thought polythene was a risky vapor barrier, should we go with something else? Any thoughts on siding or which WRB when we reside the house? I was thinking a drain wrap might help a bit.
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