Air sealing, specifically weatherstripping, eliminates drafts to save energy while improving air quality and comfort. Weatherstripping reduces air leakage by creating a tight seal between movable components such as the doors and windows. Before application, you'll need to detect air leaks and assess your ventilation needs. Detect air leaks through a blower door test from a qualified technician or find leaks yourself from visual inspections inside and outside the home.

Skill level: Basic to advanced
Most types of weatherstripping are easy to install. Variations such as metal weatherstripping are affordable and long lasting, vinyl resists moisture in high-traffic areas and felts and foams are better suited for low-traffic areas. Measure around perimeters of doors and windows to estimate the length and add 5 to 10% to the measurement for waste. Be careful not to over seal to account for ventilation.
Cost range: $50-$350
Do-it-yourself supplies such as weatherstripping, a caulking gun, a tube of caulk, rubber gaskets for electrical outlets and switches, and specialized items such as a fireplace draft stopper or an attic chair cover can range from $50-$350 to weatherize a typical home.
Savings: Up to 20% in energy costs (sealing and insulating)
Properly sealing leaks with supplies such as weatherstripping and proper insulation could save homeowners up to 20% annually on heating and cooling costs.