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You can reduce your home's heating and cooling costs through proper insulation and air sealing techniques. These techniques will also make your home more comfortable.

Any air sealing efforts will complement your insulation efforts, and vice versa. Proper moisture control and ventilation strategies will improve the effectiveness of air sealing and insulation, and vice versa.


#AskEnergySaver: Insulation
One of the most cost-effective ways to improve your home's comfort is to add insulation to your attic. <a href="/node/366805">Learn more about insulation</a>. | Photo courtesy of Dennis Schroeder, National Renewable Energy Lab.

Answering your questions about insulation -- from improving your home's comfort and lowering energy bills to safety and installation techniques.

Types of Insulation
In existing homes, cellulose (here) or other loose-fill materials can be installed in building cavities through holes drilled (usually) on the exterior of the house. After the installation, the holes are plugged and finish materials replaced. | Photo courtesy of Cellulose Insulation Manufacturers Association.

Consumers can choose from among many types of insulation that save money and improve comfort.

Insulation Materials
Cellulose, a fiber insulation material with a high recycled content, is blown into a home attic. | Photo courtesy of Cellulose Insulation Manufacturers Association.

Learn about the different insulation materials, which run the gamut from bulky fiber materials such as fiberglass, rock and slag wool, cellulose, and natural fibers to rigid foam boards to sleek foils.

Insulation for New Home Construction
Planning carefully for insulation results in reduced utility bills and superior comfort during the life of the home. In this house, raised heel trusses accommodate R-60 insulation. | Credit: Paul Norton, NREL.

Building a new energy-efficient home requires carefully selecting where you place and install insulation materials.

Adding Insulation to an Existing Home
Adding insulation in an existing home saves money and improves comfort. | Photo courtesy of Dennis Schroeder, NREL.

Adding insulation to your home is a sound investment that is likely pay for itself quickly in reduced utility bills.

Radiant Barriers

Radiant barriers are effective for reducing summer heat gain in cooling climates.