Why Use a Wall Vapor Barrier?

Optimize Your Insulation

• Vapor barriers prevent water from permeating the wall and soaking into the insulation. When moisture comes in contact with insulation sheets and fill, it can cause mold and mildew to build up, damaging the structural integrity and protective properties of the insulation. Mold and mildew in the walls can also trigger allergies and asthma. Waterlogged, moldy insulation needs more frequent replacement than insulation protected by a vapor barrier. Vapor barriers also preserve the insulation’s R-factor by reducing airflow.

Protect Your Home and Belongings

• A lack of a vapor barrier allows moisture to flow through the walls and damage your home’s framework, paint, siding and personal belongings. Excess moisture is a common cause of paint and drywall peeling or bubbling, as well as mold and mildew growth and wood swelling, warping and rotting.

Lower Humidity in the Home

• Vapor diffusion raises a home’s humidity level, leading to uncomfortable living conditions. Appliances used to combat humidity, such as air conditioners, electric fans and dehumidifiers, use excess energy and raise electric bills. For these reasons, installing a vapor barrier is environmentally friendly and lowers your costs.

Prevent Excessive Water Seepage

• In severe weather conditions, vapor barriers can slow down or prevent water seepage in basements and lower levels of the home, mitigating flood damage.