ANY SUGGESTIONS ON WHAT TO USE ON A CRAWLSPACE CEILINT TO KEEP DAMPNESS FROM GETTING TO INSULATION AND FLOOR BEAMS. SPACE IS ONLY 3′ 10″ HIGH, CONCRETE FLOOR BELOW, HEATED AND AIR CONDITIONED LIVING SPACE ABOVE. LOOKING TO USE SOME KIND OF MATERIAL LIKE TYVEK OR POLYETHELENE SHEET. SPACE TOO TIGHT TO WORK WITH SHEETROCK OR PLYWOOD, SO THE SHEET TYPE BARRIER IS THE ONLY BARRIER THAT WILL BE INSTALLED. SPACE IS ABOUT 1000 SQ FT. ALSO, HOUSE IS NEAR OCEAN, SO LOTS OF DAMPNESS & HUMIDITY TO CONTEND WITH. ANY SUGGESTIONS WOULD BE APPRECIATED. THANKS
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The conrete floor in the crawl space should be enough to slow down or eliminate moisture from the ground getting into the crawl space. The other alternative is to cover the concrete with poly and seal it to the walls with accoustical sealant. Is the crawl space insulated on the outside walls? The space should also have good ventilation to the outside via grills in the walls. Do not put the poly on the underside of the insulation in the floor joist space. Poly should only go on the WARM side of the insulation.
Jeff Up North
If you're sure that moisture is coming up through the concrete, look at http://www.xypex.com, they have exactly what you need for that. Condensation on a cold surface, of course, is a whole different problem. And 3'-10" is a crawl space palace. You could even sit on a box and work without hitting your head. Try a space that tapers from 14" down to 8" for unpleasant working conditions. It's almost enough to make me hire a skinny guy. ;-)
-- J.S.
My place is the same setup but has an HVAC trunk running through it. The outside vents were sealed nearly thirty years ago and we run a dehumidifer year round. There are clothes, papers, electronics, name it stored down there, all in perfect condition. The block walls aren't insulated although that might be something I'd consider as the floor above is a little cool on winter mornings. The crawlspace is actually more like a regular basement than anything else.
Al
HUD has an excellent publication on foundation/crawlspace re-hab. You can poke around on their site and download it as a PDF. Sorry that I don't have the hot link for you, my hard drive crashed and lost the info.
Good luck in your quest.
Virginbuild
Back again and I located the HUD site and here is the link to the various publications
http://www.huduser.org/publications/destech/rehabgds.html