Old 06-29-00, 07:12 AM
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I live in Illinois where it's really humid in the summer. I can't afford to concrete my crawlspace so what I am planning on doing is laying 2 inch thick poly-styrofoam insulation panels all over the floor(to save my poor knees from the rocks and pipes when I have to crawl around down there to fix things) and walls for insulation value. I am currently in the process of putting up insulation on the floors, ducts, and pipes too. Then I was thinking ov covering it with tyvek for a vapor barrier. I will put furring strips on the walls of the crawlspace(which is about 4.5 feet deep) about 2 feet up to keep the very little seepage below. I was going to caulk or tape the seams of the tyvek to keep them from splitting apart when they are crawled on.

Does anyone think this is a good idea to curtail the bugs and mustiness in the summer? I will eventually put in a fan, but I haven't gotten that far yet.
Old 06-30-00, 03:58 AM
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I would not use tyvak as a vapor barrier. I would put down a thick visquine (black plastic). Nothing you are doing is going to keep the bugs out. As for humidy, I would install foundation fans. (12" at least) Also maybe a basement vent or two to keep it day.

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