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plastic on dirt crawlspace floor

Posted by wianno (My Page) on
Fri, Jul 28, 06 at 10:28

My dirt crawlspace is very damp, and when I was under there the other day, there was condensation on the wood and insulation. Not good.

Would a simple layer of 8mil plastic go a long way to fixing this or am I just wasting my time? I am looking at more permanent solutions too (see rubble foundation post).

Follow-Up Postings:

RE: plastic on dirt crawlspace floor

That is the way to go, works great. Just lap it up the wall of the crawlspace and staple it on the sill plate. Overlap all the seams by at least 2 ft. Best thing you can do.

RE: plastic on dirt crawlspace floor

yeah but doesn't water still get onto the plastic by overlapping it?

RE: plastic on dirt crawlspace floor

"yeah but doesn't water still get onto the plastic by overlapping it?"

The purpose is to reduce evaporation from the damp earth, not stop actual liquid water.

RE: plastic on dirt crawlspace floor

but what if water did get onto the plastic adn being that its not a level floor water wil form puddles. Then your left with puddles of water that must be removed.

RE: plastic on dirt crawlspace floor

ANd then it will evpoarate and increse the humidity in the area for a while.
This is what ventiallation of teh crawl space is for.
And how did the water get there?
It indicates even more serious problems than moisture from the exposed earth.

RE: plastic on dirt crawlspace floor

here in my area in Syracuse ny, it's common for water to seep up through the rocky foundation floor in rainy wether. I however have been lucky because in my location I hardly ever see water when others on the stret get a foot of water. but ocassionally on hard rain days I will see some water come up through, but very patchy and nothing you can fill a bucket with.

I can't wait to move this fall to a home with a basement (dry) but I wanted to lay palstic down but didn't want to have the worries of water seeping therough the overlap. stagnet/still water grosses me out.

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