I have a problem with a basement that was finished about 1999. The house itself is from 1938 with a field stone foundation. When the finished the basement they put pt wood directly on the concrete, put R19 batts between the studs, and covered the whole thing with a poly vapor barrier and then drywall. So the vapor barrier seems to be on the wrong side to allow drying.
I had one corner where baseboard was showing signs of deterioration so I pulled that off and found that the baseplate (? whatever the studs are resting on) is rotted out down there. The studs seem fine apart from the lower inch or so. About six feet is completely gone in one direction from the corner. The other direction is deteriorated but not bad for about 3 feet. So far my plan is to replace the baseplate, repair the studs, put in rockwool for the last foot or so of insulation, put drywall back up and call it a day. Save money to redo the whole assembly.
My question is: Is there anything else I can do about that vapor barrier without tearing out the whole wall? I've read enough of the basement articles to know that on a new wall I should put a vapor barrier right against the foundation, then the wall assembly. Ideally with a perimeter drain as well. But this isn't new and that's not gonna happen for a while. Thanks!