The vapor barrier was particularly well done with all the seams being sealed with acoustic sealant a nasty permanently flexible goo that sticks to everything and ensures an airtight seal between the joins. Unfaced fiberglass or roxul rock wool is also acceptable if you already have 2 in. Given the cost of repair for moisture in your home is likely to be 500 700 at the bare minimum a 1000 investment will likely pay for itself.
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Read this article for advice on vapor barriers.
Basement vapor barrier. Newer materials from a variety of manufacturers are 10 or 15 mils thick. The fundamental problem is this. Technically many of these materials are only vapor retarders as they have varying degrees of permeability. A basement vapor or moisture barrier is installed during the new construction of a home or the remodeling of a basement.
Polyurethane sheeting is a typical vapor barrier that contractors use to prevent moisture from penetrating the walls of a basement. Or you might consider spray foam between the studs. The problem with the minimum basement vapor barrier 6 mils is that it may be a material that allows too much permeance the amount of vapor passing through and the plastic film may get damagedcompromised during the placement of reinforcement rebar and wire mesh and concrete. Avoid foam insulation that is faced with.
Dont use a vapor barrier in a finished basement. After reading your website i realized that this approach isnt the best. Rigid foam board on the interior like you have is the ideal insulation. The vapor barrier behind the drywall only causes the wooden framing of the basement walls to rot like this because there is no way to get rid of the moisture.
The rationale was the 3 mil vapor barrier would serve to protect the framing from any water intrusion ie such as the vapor given off from the walls as in your first figure. Vapor barriers are used for a number of reasons the most prominent of which is to prevent mold but rot and other problems can occur within the walls as well. A vapor barrier is not totally leak proof but is certainly an advantage particularly for below ground spaces like basements and crawl spaces. Some other reasons you may want to utilize vapor barriers throughout your home whether it be for new construction or remodeling are.
These meet the aci 3021 guide for concre. I originally had planned to put a 3 mil vapor barrier directly against the basement walls painted concrete and then frame while leaving a gap between the frame and basement wall and insulate with fiberglass batts. The short answer is. The moisture content of wood.
Of foam against the concrete. In the picture above the plastic vapor barrier has been removed. A vapor barrier is any material used for damp proofing typically a plastic or foil sheet that resists diffusion of moisture through the wall floor ceiling or roof assemblies of buildings to prevent interstitial condensation and of packaging. 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.
This is asking for trouble especially with a full bathroom which generates a lot of humid air.
