Interior ‘vapor barrier’ in Eastern NC
I’d appreciate any help I can get on this one. Just purchased a home in coastal North Carolina. It was built in 1985, when for some strange reason, it was code here to apply a layer of poly to the inside of the stud wall before drywall. The smarter contractors waited until rough inspection was completed and then cut out the poly before drywall was applied. Unfortunately, that didn’t happen often enough. I’ve heard horror story after horror story about 12-30 year old homes rotting from inside out in this area. I was hopeful that my newly purchased house would fall into the ‘cut the poly out’ category, but alas.
I’ll cut to the chase. I’ve pulled baseboard and inspected for water/mold/rot in the wall cavities and so far have found none. It is a very wooded lot, with the house shaded on all sides almost 100 percent of the time. Cedar ship lap siding with true plywood sheathing and roof decking. Previous homeowner ‘sealed’ the crawlspace and installed a fan in the floor of the house to keep crawlspace pressurized (they kept cardboard boxes of books and papers down there with no damage whatsoever. I witnessed this with my own eyes.)
I can’t afford to remove drywall and cut out the poly. However, as a former contractor, I can do any other work necessary in the form of some elbow grease. Should I drill holes in every studbay to puncture the poly and then patch them? Could that do the trick? If so, how many holes and how big? Please advise. Thanks in advance!
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