Windows, Doors, and Insulation

Overview

To prevent air leaks, caulk your windows and doors. If possible, replace old windows with energy efficient ones.
When you’re shopping for new windows, look for the ENERGY STAR® label; it means that the windows are performance certified.
Remember, the lower the U-value, the better the insulation. In colder climates, a U-value of 0.35 or less is recommended.
In warm climates, where summertime heat gain is the main concern, look for windows with double-glazing and special selective coatings that reduce heat gain.
Select windows with air leakage ratings of 0.3 cubic feet per minute or less.
In temperate climates with both heating and cooling seasons, select windows with both low U-values and low solar heat gain co-efficiency (SHGC) to maximize energy benefits.
Look for ENERGY STAR® and Energy Guide labels.

Cold-Climate Window Tips:

Install exterior or interior storm windows; storm windows can reduce heat loss through your windows up to 50%. Storm windows should have weatherproofing at all moveable joints; be made of strong, durable materials; and have interlocking or overlapping joints. Low-e storm windows save even more energy.
Repair and weatherize your current storm windows, if necessary.
Install tight-fitting, insulating window shades on windows that feel drafter after weatherizing.
Close your curtains and shades at night; open them during the day.
Keep windows on the south side of your house clean to maximize solar gain.

Warm-Climate Window Tips:

Install white window shades, drapes or blinds to reflect heat away from the house.
Close curtains on south and west facing windows during the day.
Install awnings on south and west facing windows.
Apply sun-control or other reflective films on south facing windows.

Insulation Tips:

Consider factors such as your climate, building design, and budget when selecting insulation for your home.
Use higher density insulation, such as rigid foam boards, in cathedral ceilings and on exterior walls.
Ventilation plays a large role in providing moisture control and reducing summer cooling bills. Attic vents can be installed along the entire ceiling cavity to help ensure proper airflow from the soffit to the attic, helping make your home more comfortable and energy efficient.
Recessed light fixtures can be a major source of heat loss, but you need to be careful how close you place insulation next to a fixture unless it is marked “I.C.” designed for direct insulation contact. Check your local building codes for recommendations.
When installing insulation, follow the product instructions on installation and wear the proper protective gear.

Back to Conservation Tips

Technology

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