Basement Vapor Barrier Or Not

I am currently deciding whether or not to install a poly vapor barrier on top of the framingbatt before i put up the drywall or should i avoid that and put the drywall up as is. A vapor barrier will help keep the levels of moisture down in the basement which can either compromise the homes foundation or increase the humidity level in the basement.

Vaporloc Elite Basement Wall Vapor Barrier System Foundation

Should i put vapor barrier on interior basement wall.

Basement vapor barrier or not. Not to be confused with a vapor barrierwhich is placed on the warm side of the wall just in front of the insulation and behind the drywall a moisture barrier goes against the basement wall. Vapor barriers when to use them when to not. Dedicated vapor barriers have no place in a basement wall.

Installing a vapor barrier over a dirt floor basement is an instant way to block moisture and insects from entering the basement space. Weve written several articles about basement insulation and a cost effective approach to basement insulation using foam board and fiberglass insulationsince writing those articles weve received quite a few questions about when to use a basement vapor barrier and when not to. Otherwise is it dangerous as it will trap moisture against a moisture sensitive element as i indicated.

On this special edition of the build show matt takes us on a guided tour through the ins and outs of vapor barriers from the studio building. Heres lots of supporting evidence since this perspective appears to be controversial. 141 comments on avoiding basement insulation mistakes.

Not every wall does. On the exterior concrete walls i glued 2 in. Basement vapor barrier and insulation.

Crushed stone or coarse gravel acts as an effective capillary break and sheet polyethylene in direct contract with a concrete floor slab acts as an effective vapor barrier. If the basement wall is insulated on the outside then the vapor barrier is superfluous. A capillary break and vapor barrier should be located under concrete basement floor slabs.

A vapor retarder is a material used to prevent water vapor from diffusing into the wall ceiling or floor during the cold winter. I live in massachusetts and im finishing 34 of my basement. Xps foam extruded polystyrene before building the interior walls to create a thermal breakvapor barrier.

The basement is a walkout. So we thought it might be a good idea to clear up some of the confusion. After the insulation is in place you will want to add a vapor retarder sometimes called a vapor barrier if you need one.

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