Closed-cell spray foam in crawlspace for encapsulation
Some of you might have seen my other posts and know that I’m currently in a mad dash to encapsulate this crawlspace before moving in next week.
-shallow crawlspace (never vented)
-Crawlspace contains no ductwork or appliances (mini splits)
-Balloon Framing with area between crawl and living space sealed already
-Nasty stuff in crawlspace removed, but remnants without question (bad stuff)
-6 Mil poly sheet over dirt for vapor barrier (to be replaced with heavier later)
-air seal floor joists with OSB or Poly-Iso (to assist with keeping out “bad stuff”)
-Spray 2″ Closed Cell over rim joist and rubble stone foundation
-Exhaust from exterior crawlspace wall and install adequate vent in sub-floor
-My friend who sprayed the whole house with 3″ closed cell foam has told me that the thinks spraying this wood and stone (shown in picture) with closed cell will rot the wood. This house sits practically at grade.
-If he’s wrong, would the poly sheet run up the vertical surface before or after spraying?
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