vapor barrier - best practices


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Old 01-01-04, 06:10 PM
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Question vapor barrier - best practices

Any recommendations to hold vapor barrier against basement walls (cinder block).
 
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Old 01-01-04, 06:20 PM
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Is that all you're doing is a vapor barrier?
 
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Old 01-01-04, 06:44 PM
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No... when building the wall 4" away from the foundation, whats the best to hold the vapor barrier up?

(several walls are coming in because of pipes) and the rest are an inch or two in because of the water channels in the floor. (that lead everything to the sump)
 
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Old 01-01-04, 06:54 PM
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I put the vapor barrier (plastic) on the new stud wall, under the drywall. Stapled up enough to hang until I get the DW up....
 
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Old 01-02-04, 02:43 PM
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This is a common question here - please refer to the following thread - some great ideas are discussed:

http://forum.doityourself.com/showth...hreadid=150877
 
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Old 01-04-04, 09:17 AM
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Lightbulb V/B

Id just let it hang from the sill plate again the cement wall .still put one over the insulation on the studs just under the dry wall.
ED
 
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Old 01-05-04, 04:50 PM
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I don't want to start an argument about this but adding a sheet of plastic to a concrete basement wall doesn't sound like a very good idea to me. Simply for the fact that the plastic will sweat against the concrete and I'd be concerned about growing mold and fungus and wild things in there. I'd be more prone to use a nice waterproof paint or Styrofoam if I thought there was any need for it. Otherwise use the vapor barrier on the stick built wall and let it go at that. Just my 2 cents.
 
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Old 01-05-04, 06:09 PM
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Its not my idea to put plastic against any walls.. just from the description, the drawings and local building codes they require 4mil barrier against the walls.
 
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Old 01-06-04, 04:21 AM
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I agree with webrebel, I just don't think the 2 layers of poly (one against the masonry wall and one under the drywall) is a good idea, but here it's a code requirement. It goes against everything I was ever taught about double vapor barriers. I guess time will tell if this is a good idea or not.

In the meantime, we have do do what code requires.

Bruce
 
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Old 01-07-04, 12:59 PM
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Lightbulb V/B

Have done Earth contact homes with the V/B on the cement walls and on the studs over the insulation. Have some over 15 years old and have not had any mold or problems. ED
 
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Old 01-08-04, 12:57 PM
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Hehe, i didn't know it was such a hot topic. I appreciate everyones input though!

I treated the walls with the sealent, so i'm asking if that will suffice for vapor barrier.

Like pulling teeth to get answers over the phone!
 
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Old 01-12-04, 07:09 AM
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Like pulling teeth to get answers over the phone!
You can thank the lawyers & what's her name that Julia Roberts played in that movie about the toxic waste & cancer cells, man I'm gettin old, memory is a sieve some days. Anyway my point is that mold has become the big lawsuit buzz word, the lawyers have drained the asbestos manufacturers dry & mold is their new paycheck!

If you treated the walls with the sealant, IMO you'll be fine. Here in the midwest, we finish basements all the time using faced batted insulation along new exterior walls, no poly at all & to date I've never had a problem. But we don't have to deal with strict bldg codes except in a few areas.

There's my $.02, worth the price charged.
 
 

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