Which liner for crawlspace?
My house is a front to back split. You walk in to the living room and the kitchen is to the right. Below it is a crawlspace. You can enter the crawlspace by walking down 6 steps to the den and there is an entrance in the wall. The crawlspace is about 12 ft x 32 ft x 3.5 ft high. The floor of the crawlspace is mostly an uneven very porous concrete. There are 3 vents to the outside. I want to close the vents up and put down a liner. Can I use a liner like this? eBay Store ? Triumph Global: Search results for. They are 20 mil pond liners so I should be able to crawl on them when I need to go in there and shut off the sprinkler for the winter. If these liners are not acceptable, can someone give me a link to liners that are. Thanks in advance. They will work. Just very costly. Any 6mil poly will work. Originally Posted by airman.1994 They will work. Just very costly. Any 6mil poly will work. Any links to someone who sells the 6 mil poly? Also, I do have to go in the crawlspace a few times a years to get to some valves so I need to make sure I can crawl on the liner w/o ripping it. Will the 6 mil poly stand up to that? You can get 6mil at any home store. Yes 6mil is fine for light traffic. You could always double it where you need to work. We use and recommend 20mil liners because we've seen and removed many a shredded 6mil and we are all for doing the job once and for good. The one in the pic looks fine however it doesn't seem to be UV coated so keep it away from sunlight as you work (keep and cut it in the garage for example). Sun is known to change the composition of the poly and make it a bit crumbly. Use mechanical fasteners rather than adhesives to attach it to the wall and mastic tape to close and seal the seams. However be extra careful and consult a pro if you have combustion appliances in that crawl space. You do not want to depressurize the space and there is the carbon monoxide concern. There are no appliances in there. The only thing in there is the sprinkler system valve that needs to be shut off every winter. What kind of mechanical fasteners do I use? How far apart do I place them? How high up the wall do I go? I assume the humidity does not come out from between the fasteners(which I thought it would). Where do I get the fasteners? What exactly are they called? Thanks We have never had a problem with 6 mil! 20 mil can triple the price! an easy way to install it is to pinch the VB between the wall and a furring strip. Go up the wall as high as the dirt on the out side. Always leave at least an inch under seal plate. I used a 6mil liner in both my crawl spaces wih dirt floors and it's worked out just fine. My insulation kept falling down due to the humidity. I re-insulated and put down the liners last year and no problems. I used heavy rocks all over to keep the liner down. I also do not have any vents. I would be careful putting any type of wood in there. OK, Home Depot has a roll of 6mil clear plastic that is 20x100. Will this do? Husky 6 Mil, 20 Ft. x 100 Ft. Clear Polyethylene Sheeting Roll - CFHK0620C at The Home Depot I can double it up so it is 20 x 50. The walls on the crawlspace are about 3.5 ft tall and are concrete. What is the best way to attach the liner to the concrete? I assume tape won't hold and neither will any corking or glue. There are no furring strips on the concrete. Thanks so much. Yes, that should do it. As for the concrete block I don't think you have to be too concerned in covering it all up with plastic. As long as you have some overlap and the dirt floor is completely covered and plastic weighted down you should be fine. 2-3 inches overlap is ok - get some long rocks or bricks and just lay them against the wall. Worked for me...
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