Ice and Water shield on an exterior wall….. ? asking for trouble
For our home in zone 5 (Syracuse, NY) which had some moisture intrusion issues over the last 50 + years – we were planning to replace the plywood/felt/Tyvak with Zip R9 sheathing and interior Rockwool batt insulation in our 2 x 4 and 2 x 6 walls (different areas of the home built at different times); and use a rainscreen under the siding.
My question now applies to the ice and water barrier installed last month while the roof was being repaired. From the photo, you can see the black shield extends from the side of the roof up the wall with 2 picture windows. The interior of this wall is mainly a bedroom, and only a small portion is an unconditioned attic. It seems to me this may contribute to moisture trapping in the wall unit which could lead to mold/rot in the future.
Can this be used with the Zip R system on this particular wall, or would it be best to take it down and install the Zip R as planned? I have already asked the contractor not to use this on any other walls.
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