Crawl space dampness seal it completely with membrane ?

In looking for some feedback info info and web links to membane systems ( products and sources ) to seal crawlspaces -sealing he soil all the way up floor up foundation walls to the floor framing . -thanks
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Did you use www.google.com to search? I did and found this for example
http://www.taunton.com/finehomebuilding/pages/h00107.asp
There are a lot more

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If it's a question of search engines, try Dogpile.com. much better than Google, more relevant links and less advertising.
Bob
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snipped-for-privacy@nospam.com wrote:

Huh? Not sure what you are asking. Commonly, 4-7 mil sheet plastic is laid on the dirt. It depends somwhat on the construction and time of placement. In new construction any concrete piers are covered with the plastic and then the wood floor supports are place atop the plastic sheating. If the space is wider than the sheets then the sheets are overlaped 18 inches to 2 feet and the plastic is run up the wall about a foot. The sheets must not be sealed together as the purpose is to stop the rise of soil moisture, but there must be opening (between the overlaps) to allow any liguid water to escape into the soil. In old construction, the plastic needs to be cut so that is goes up around any center piers and then a sheet is laid atop the seams to cover that area; i.e., there must be no ground showing and all seams must be overlaped 18 inches. You could run the plastic up the walls to near the joists or beams but there isn't any need to go up the foundation walls and piers more than a foot. Don't cover over any wood supports. And be sure there are vents for good air flow in the crawl space. Good luck.
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