Weatherstripping your windows is one of the simplest things you can do to save energy and make your home more comfortable.
By reducing air leaks through your windows, less heat will be wasted during the cooler months of the year and less cool air will be wasted during the warmer months. You’ll save energy and money. Using less energy means reduced demand on natural resources as well as fewer emissions.
Weatherstripping is a pretty simple procedure. Basically you seal air leaks on your windows (you can do doors, too) with strips. It’s made in all kinds of materials including felt, vinyl, or foam rubber on a wood or plastic strip. The easiest type of weatherstripping to install tends to be the kind with adhesive backing.
If you’re handy and motivated, weatherstripping is a pretty doable DIY project. It can also be done by a contractor as part of other energy efficiency measures like adding insulation and air sealing for leaks in your home's thermal envelope (that’s building speak for your roof, walls, windows, doors, and foundation).