What wrap should be used with thicker rigid foam? What about moisture release?
Would housewrap be necessary if I had:
hardicolorplus plank siding
with closed cell r5 1 inch taped rigid panel under that
then T11 panel under that
then r13 batt under that
then painted 1/4 drywall on interior?
(I am about to insulate and hardiplank the exterior of my already t11 paneled walls)
If wrap required what type/permeability would be required of housewrap and placed where? I am confused about trapping moisture not letting it escape, yet others have written that the tape on rigid board seams peel away and that rigid board shrinks exposing seam gaps over years, so leaving me to think taped closed cell may not remain moisture proof from outside. Reno Nevada, zone 5
I've read that with newer codes, foam rigid board that is thick enough for proper zone to not cause dewpoint issues, may also be too moisture resistant to allow the building to release moisture, so inspectors now allow not using wrap, yet the idea that tape fall off from rigid seams, and also that rigid shrinks and exposes seams makes me wonder if wrap should be used anyway. I'll want to use rigid foam that is fire resistant i think that is the corning. Thanks for any help.
Posted Sun, 03/03/2013 - 04:00
Edited Sun, 03/03/2013 - 07:21
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