Crawlspace Insulation and Encapsulation Questions
2000sqft brick ranch on a crawl space in CZ3 (southeastern NC, warm humid). Built in 1989. The stem walls are brick. The HVAC ducts are located in the crawlspace. I have removed all of the fiberglass insulation from the floor joists. There’s some mold in several places. It doesn’t appear to be very heavy but it’s obvious that there has been significant moisture issues in the past.
I want to encapsulate the crawl space and insulate the brick stemwalls. I’ve heard varying opinions regarding rigid foam vs. spray foam for insulating the crawl space walls and rim joists. Which would be the best option for my location? Major disadvantages of using spray foam? Are there any major risks in using spray foam for this application?
Also, once the crawl is sealed and insulated, which is the best option…a dehumidifier or a supply duct with conditioned air to control humidity?
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