Moisture damage can be a costly result of poor attic insulation and stagnant attic air. Moisture build-up can weaken your roof rafters, sheathing, wall components, and flooring systems. In colder climates, during winter months, moisture and condensation can result in ice dams. Ice dams form at the edge of your roof and over time can destroy your roof, gutters, and all adjacent structures. (see following flash presentation for more on Ice dams)
Daily activities generate moisture that can pass into your attic. The resulting condensation may also cause mold, mildew, and wood rot. The average family generates 2-4 gallons of water vapor per day.
Good Insulation will help control moisture transfer into your attic. But insulation alone is not enough. You also need good air circulation in your attic, year round. Proper ventilation and air circulation in your attic will keep moisture levels low and prevent condensation.
Moisture build-up can also contribute to respiratory illness resulting from mold, mildew growth. Before reinsulating mildew infected areas in your attic, be sure to have a professional mold mitigation company inspect your home, specifically your attic space then diligently follow mitigation recommendations prior to reinsulating your attic.
The right combination of insulation and attic ventilation will prevent attic moisture from ever becoming a problem. If you live in a humid or sub-zero climate, you should have your home inspected for moisture problems, at least once per year.
