The key to successfully insulating basement walls is to stop moisture movement and prevent mold growth. The structural elements of below-grade walls are cold (concrete is in direct contact with the ground). Of particular concern are rim joist areas, which are cool and damp not only in the winter but also during the summer. Therefore, it is important that all basement insulation is installed as airtight as possible and has an effective vapor barrier.
Closed-Cell spray foam is perfect for “locking out” water vapor that inherently wants to migrate from your damp basement walls to your finished basement rooms. Closed-Cell spray foam offers many benefits: Additional structural stability, a great vapor barrier, easily covers pipes, wires, and other utilities, and it provides exceptional R-Values. Basement walls that are insulated with Closed-Cell spray foam are less susceptible to condensation and mold. This means that spray foamed basements will stay drier and smell better than uninsulated basements.