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Ways to improve your windows' energy efficiency

Digilifetrends Updated 2026-10-27 2 min read

This State Farm® Simple Insights® article on improving window energy efficiency is provided by State Farm agent Rebecca Stutts Hovater.

Make your windows energy efficient
Rebecca Stutts Hovater

These simple changes can help keep your home warmer during cold weather and cooler when temperatures rise.

Old windows can drive up utility costs and make your home less comfortable. Still, you do not need to replace every window to see better efficiency. Here are some do-it-yourself updates that can help make windows more energy efficient:

Install storm windows: Low-emissivity storm windows may reduce heating and cooling costs by 12% to 33%, according to the U.S. Department of Energy (DOE). Exterior storm windows are designed to fit most standard double-hung windows.

Hang curtains: The DOE says medium-colored drapes with white plastic backing can cut heat gain by 33% when used on windows with direct sunlight. In colder months, drapes can also serve as insulation and reduce heat loss by up to 10%.

Add caulk to windows: Sealing air leaks around windows can lower energy costs by 10% to 20%, according to the DOE. You may need about half a cartridge of caulk for each window or door.

Use weather stripping: The DOE says weather stripping can trim energy bills by as much as 10%. Metal and vinyl options are the most effective, though foam is a less expensive choice. For the best results, clean the surface thoroughly before applying it.

Create exterior shade: Awnings and other outside shading features can help keep a home cooler in warm weather by blocking sunlight. The DOE says awnings can reduce heat gain by 65% to 77%. Choose opaque awnings in lighter colors to reflect more heat.

Replace your windows: If your windows are extremely old or no longer effective, replacement may be the best option. If you do replace them, avoid simply throwing them away. Consider donating them to a Habitat for Humanity ReStore or taking them to a building materials reuse center.

State Farm® Insurance Agent

Rebecca Stutts Hovater

501 S Montgomery Ave., Suite C, Sheffield

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