EcoRenovator - View Single Post - Is there a thread on crawlspace encapsulation?

Ryland · 04-13-12, 05:41 PM

The vent fan in my crawl space is pulling air out from under the 6mill poly via a drain tile that is under it, this is to keep the foundation drier so it doesn't crumble, it tends to exhaust very humid air and pulls the air away from the crawl space instead of pulling more moisture in to the crawl space, that fan is then on a humidistat so as the crawl space humidity goes up the fan kicks on.
Our plastic sheeting is foamed around the outside edges with expanding foam and polyurethane calk in other places, the caulk does a much better job of gluing and sealing.

My next plan is to have a timer switch installed as well so that the fan kicks on once a day no matter what the humidity, just because the humidistat is on the non vented side of the plastic.

04-13-12, 05:41 PM	#9
Ryland Master EcoRenovator Join Date: Mar 2009 Location: Western Wisconsin. Posts: 913 Thanks: 127 Thanked 82 Times in 71 Posts	The vent fan in my crawl space is pulling air out from under the 6mill poly via a drain tile that is under it, this is to keep the foundation drier so it doesn't crumble, it tends to exhaust very humid air and pulls the air away from the crawl space instead of pulling more moisture in to the crawl space, that fan is then on a humidistat so as the crawl space humidity goes up the fan kicks on. Our plastic sheeting is foamed around the outside edges with expanding foam and polyurethane calk in other places, the caulk does a much better job of gluing and sealing. My next plan is to have a timer switch installed as well so that the fan kicks on once a day no matter what the humidity, just because the humidistat is on the non vented side of the plastic.