The primary purpose of a air sealing a house is to add a vapor barrier in order to keep moisture from getting inside your walls. Condensation within the walls can cause wood rot, mold, mildew, and fungus growth. Signs of condensation within the walls include blistering exterior paint and mildew stains on the walls.
A building vapor barrier must be continuous to work - no holes, leaks, un-taped seams or edges. Leakage will negate the effectiveness of the barrier. Any tears, openings, or punctures that may occur during construction must be completely sealed with tape. Ending the vapor barrier at the floor or ceiling junction has the same effect as a large hole. To create the vapor barrier, the seam between the ceiling and wall must be sealed well. Think of your house as a large balloon with the vapor barrier as the skin of the balloon. A leaky barrier is not better than no barrier at all. .
Total Insulation will keep heat and moisture in during the winter. It will keep heat and moisture out during the summer. It will not absorb moisture in the event of a water leak. If you are finishing your basement, install Prodex Total Insulation (vapor barrier) on the basement walls before framing.
Basements Have Different Insulation Requirements Than The House Above
Due to the underground environment, moisture is the primary consideration in developing a basement insulation strategy. Excess moisture can cause mold, mildew, odors, decay, fungus growth and wood rot.
A vapor barrier is an essential part of the moisture control strategy for a basement, foundation, home or metal building.
Permeability (perms) refers to the measure of the rate of transfer of water vapor through a material. The lower the perm, the fewer the vapor that can pass through. Look for a vapor barrier with a perm of less than 1. Transmission rates are established by standard test methods. One common set of units is g/m²/day. or g/100in²/day. (1.0 US perm = 1.0 grain/square-foot·hour- inch of mercury ? 57 SI perm = 57 ng/s·m2·Pa).
Air Sealing Will Protect Your Foundation
Adding Air Sealing as a vapor barrier should be used under a slab-on-grade foundation or poured cement basement floor. Since a damp basement is one of the greatest producers of moisture (up to 50 lbs/day of vapor), the vapor barrier under concrete floor slabs and over earth floored crawlspaces are integral structural components of interior moisture control. A vapor barrier is also needed in your crawlspace to prevent moisture penetration.
Call Burbach Insulation Company today for a free estimate at (262) 292-4492.