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7/6/2015 1:01:21 PM
 
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Section 22: Sale/Free/Services Subject: Crawl Space encapsulation Msg# 924928
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| I had a dehumidifier installed four years ago and was told at that time to leave the vents OPEN all year to avoid a moisture build-up. I don't have an outside shower but I do have two ball valves, one for hot the other for cold. When I leave for the season I open ALL the spigots including the outside ones and then open the ball valves in the crawl space to drain the house 100%. I put windshield washer fluid in ALL the drains including the garbage disposal as well as the toilet tanks and bowls then flush the toilets to be sure the anti freeze is through the toilets. Windshield fluid is cheap, less than $2 at Wal Mart so don't be stingy. I have a vapor barrier on the ground under the house and it seems to work fine. A lot of companies out there will try and sell you on a "system" for the crawl space, very expensive in my opinion. I also leave the heat on about 52-53 degrees. | ||||||
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For reference, the above message is a reply to a message where: Greetings, We have a typical crawl space under home with several sliding vents around the foundation wall, an access door and a vapor barrier. The vapor barrier is in good condition but joints at overlaps and at edges of walls are not sealed. We need to access this space to turn on/off the outside shower water. This is necessary to prevent pipes freezing in cold months. In early May, before I got the vents opened there was condensation resulting in a small amount of moisture accumulation on the vapor barrier. No signs of mold or wood being impacted by moisture. I am wondering if anyone has encapsulated their crawl space? Are you pleased with the results? Can you tell me about how many square footage was encapsulated and what the approximate cost was? Who did the work for you? I am interested in how this might save on energy costs, (some reports suggest 18% per year savings). Completely sealing the crawl space. Preventing moisture damage/mold potential. Some studies suggest the current construction technique of concrete walls with vents is not recommended. Any advice or experience would be appreciated. Steve Tuttle |
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