Wall Assembly Retrofit
I am looking for some direction on the best way to handle my wall assembly. The house was built in 94′ just north of Raleigh NC. It has poly behind the drywall, r15, fiberboard sheathing, and masonite siding with vinyl over it. The vinyl was added a year after the house was built as part of a lawsuit with the subdivision.
We are about to build an addition on the house and do some other exterior work. I am planning on residing the house in the process but have concern on how to improve the air sealing of the exterior with the fiberboard and not increase moisture issues on the poly behind the drywall. I have yet to find signs of dampness or condensation on any drywall sections that I have worked on the last few years but I don’t want to change something that would cause the issue.
Can the fiber board be sealed? Is replacing it better option? Is taping the WRB the best option? Will exterior insulation help or hurt the poly behind the drywall? Thanks for all the guidance.
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