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What is the best way to insulate a crawlspace to keep humidity down and stop odors?

Dave Bell Published: Oct. 24, 2019, 3:57 p.m.Last updated: Dec. 1, 2019, 8:10 p.m.

I have a crawlspace with 4' concrete walls and a cement floor, insulation between the floor joists and has  3 - vents to the outside. I am thinking of 1" foam boards on the walls, sealing the floor. There is no moisture only when I put a piece of plastic down.  Just want to warm it up a little and keep away any smell. Can you help me. I live on Vancouver Island

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