6 Easy Steps to Winterize Your Windows

Make your windows more efficient this winter: Try these tips and reap the rewards of a warmer house and lower energy bills.


  • Get your windows winter-ready with these easy tips.
    Photo by Tara Moore

Making sure our windows are efficient makes sense—windows account for 10 to 25 percent of our heating bills because of leaked conditioned air. If you aren’t quite ready for the expense and hassle of installing new, energy-efficient windows, check out our easy ways to winterize existing windows and keep your home—and your pocketbook—comfortable.

Back to Basics

Check the perimeter. This may seem obvious, but even small cracks or other structural imperfections let hot air pour out of your home. Take a good look at your windows. Are there any easy-to-spot problems such as cracked glass, rotting wood, or obvious air or water leakage? If so, address those issues either as a DIY project or by calling a professional.

Seal it up. Now that your windows are sound, focus on caulking and weather-stripping. Use caulk for stationary cracks, gaps or joints less than 1⁄4-inch wide. Use weather-stripping for components that move. For links to step-by-step instructions for these easy projects see How to Weatherstrip Double Hung Windows and How to Seal Air Leaks with Caulk.

Beautiful & Functional

Showy shades. Simple window shades can be an effective way to save energy. Mount them as close to window glass as possible, leaving the sides of the shade close to the wall to help seal in air. You can try dual shades (reflective on one side and heat-absorbing on the other), quilted roller shades, or Roman shades with layers of fiber batting and sealed edges. Raise south-facing shades during a winter day, and lower them as sunlight starts to fade in the late afternoon or early evening.



The deal on drapes. The ability of window draperies (or drapes) to reduce heat loss depends on the fabric to a large extent. In general, look for thermal drapes to keep your home warmer. Hang drapes as close to the window as possible. To reduce heat loss by up to 25 percent, try hanging the drapes at the ceiling, sealing drapes at both sides with Velcro strips or magnetic tape and overlapping them in the center. You can insulate more by layering two drapes on top of each other: One inside next to the window, and the second open to the room. Close all drapes on a winter night, and keep drapes closed on windows that don’t get sun during the day.

Batten Down the Hatches

Consider storm windows. Installing storm windows is less expensive than replacing old windows in your home, and they can reduce heat loss through windows by 25 to 50 percent. They are available for most windows and come in many types, ranging from inexpensive plastic films to glass coverings treated with low-emissivity (low-e) coatings.

Anne-Brit
10/6/2014 8:07:37 AM

To keep drapes closed all day in a room, doesn't sound very healthy. As far as I know, rooms need some light and airing to keep it fresh! We don't want fungus to thrive in damp and darkness anywhere in our houses!




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