Insulating basement with foam and moisture transfer
I have been planning on insulating my basement with foam to make it a more usable space. The area I'm in has a high water table and the basement is very damp once the weather warms in spring until late fall. I ran across this video http://www.youtube.com/watch?v=kwn0Vjw_ji0&feature=player_detailpage#t=1619 which mentions that if the foundation is not dry, spray foam (and I assume rigid foam) will result in moisture being pushed up in the foundation wall and accumulate in the sill plate. I've never run across this as a potential issue before, can anyone confirm or quantify how big a problem this is? My house is almost 60 years old and the floor joists are directly on the concrete foundation. If this is an issue, what are the options for inserting a capillary break between the foundation and the joists in an existing house?
Posted Fri, 04/04/2014 - 00:04
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