Shade Your Windows

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Quick Facts Affordability Cost Savings CO2 Reduction		Using blinds or drapes on your windows provides insulation winter and summer. Heat loss from windows can account for 10% to 25% of your heating bill in winter. Window coverings can be a quick and cost-effective way to cut heat loss, block cold drafts and save 5% to 15% of your energy expenses. Affordability Blinds and drapes vary widely in price, but they don't need to be expensive to be effective. Long-term savings from improved home heating efficiency will largely offset the upfront costs. Cost savings Window coverings can save 5% to 15% off your energy bills in winter by keeping your home warmer – and they help keep your home cooler in summer as well. Health & comfort Window coverings make your home more comfortable by reducing drafts and holding heat in. Find window coverings you like to look at, so you can enjoy their aesthetic value and use them regularly. Environmental considerations When buying window coverings, consider these factors to help minimize your ecological impact: Choose fast-growing cellulose materials, such as bamboo or Forest Stewardship Council (FSC) certified woods. Avoid window coverings with possible toxic treatments, like bleached cotton or synthetics. Take into account the energy and toxins used in manufacture (especially for vinyl and other plastics), and the eventual disposal of the window coverings you choose.

What you need to know

• Put south and west-facing windows at the top of your list. During winter days, keep window coverings on south-facing windows open to allow sunlight to enter and warm your home. Solar heat gain can help ease the demand on your heating system.
• To hold heat in when you go out, keep curtains or blinds closed over windows that don't get direct sunlight.
• If you are building or renovating your home, consider putting lots of energy-efficient windows on the south side of your home. These catch winter heat and, with appropriately designed eaves, can be shaded from the hot rays of the higher angle summer sun.
• It is a good idea to open drapes and blinds at some point each day to allow for air circulation and reduce moisture build-up.
• Close curtains and blinds overnight to maximize their insulating ability.
• Horizontal blinds are most effective at keeping heat in and cold out when the inside edge is closed upwards.
• Install tight-fitting, insulating window shades on windows that feel drafty after weatherizing. In general, the closer your window coverings are to the window, the more effective they will be.
• Curtains are more effective with a wide sweep to either side of your windows.
• With electric baseboard heat, make sure there is adequate clearance for drapes or blinds above the heating units for air circulation and fire safety.
• Ensure curtains are lined to maximize their heat retention and cold-blocking abilities in winter, and their heat-stopping/cold retention ability in summer.
• Consult our Home Cooling Green Guide for more information on how window coverings can keep your home cool in warm weather.

FAQ

Do I need to keep my curtains closed, blocking out the sunlight, in order to keep the heat in?
Daylight is a free and effective way to warm your home. If a window receives sunlight in winter, keep the coverings open during the day. Close the window coverings at night to keep that heat in.

For windows that don't get sun-warmed, keep the coverings closed when you aren't home.