Tag Archive for leaky windows

Drafty Windows: The Unseen Energy Thief

With the transition from warm summer weather into cooler fall and winter temperatures, you want to be sure your home is as energy efficient as possible.  One of the biggest drains on your heating bill come from drafty windows.

Air leaks are not always easily seen.  One way to test air leaks in your home, and especially around your windows, is to do a “smoke test.”  All you need is a lit incense stick.  To conduct the test, close all of the windows and doors in your home and turn off any combustion appliances, like a furnace or water heater.  Turn on your kitchen and bathroom exhaust fans so that you create a negative pressure in your house.  This negative pressure sucks outside air into your home through cracks or openings.

Now, to check for leaks, hold the lit incense stick close to the spaces around the edges of your windows and doors and look for a noticeable change in the smoke coming from the lit incense stick.  If there is an air leak, the smoke with be drawn inwards by the outside air being pulled into your home by the exhaust fans.  If the smoke doesn’t change or remains undisturbed, you can assume that there are no leaks in that specific area.  You will want to repeat this test throughout your home, checking all windows and doorways as well as any other areas you suspect a leak.

If your windows are the source of your air leak, you will want to consider replacing your windows with a more energy efficient window.  For our area, you will want to look for at least a double pane window with argon gas that is rated for Energy Star Northern Zone.  To increase the thermal efficiency of your windows, you could choose a triple pane window or even a triple pane with krypton gas (that could even keep Superman out!).

Today, there are many window manufacturers to choose from as well as different window styles.  Your contractor can help you choose the best window for your home and insure they are properly installed.