Insulation
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Batt Insulation
This project was a fairly straight forward insulation project with a vented area above the insulation that will allow for proper venting and circulation that will prevent condensation and moisture problems. Normally Visqueen is stapled to the walls over the insulation then the drywall is placed over it. We base our decision not to use a Visqueen moisture barrier upon the most recent building science. Studies have shown that we do not use it and here is why. Imagine the moisture, we live in a dry climate on the edge of a desert. The warm moist air in a home passes through the drywall and the cold air is coming in through the siding, house wrap sheeting and insulation. It meets at the Visqueen and condenses causing moisture problems. Eliminate the Visqueen and it doesn’t have a place to condense. Use the interior painted drywall as a moisture barrier and the problem is gone. Local building code does not mandate Visqueen usage and the insulation companies are willing to use it or not. I feel that we have clarity on the issue finally after plenty of research. In my opinion is that this issue is also a green building thing because it improves indoor air quality by eliminating a source of mold.
