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Where to Install Insulation

In general, there should always be insulation between the areas of your home that are heated/cooled and the areas that aren’t, from the roof down to its foundation. This applies to every home.

It’s generally most cost-effective to insulate the attic/roof first, then the foundation/floors, then the windows, and finally the walls.

 
Insulating the Attic

Properly insulating and air sealing your attic will help reduce your energy bills. Attics are often one of the easiest places in a house to insulate, especially if you'd like to add insulation.

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Insulating Foundations

A properly insulated foundation can result in lower heating costs and more comfortable below-grade rooms, if you have any. It can also help prevent moisture problems, insect infestation, and radon infiltration in your home.

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Insulating Basements

A properly insulated basement can help reduce your energy costs. However, basement walls are one of the most controversial areas of a house to insulate and seal.

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Insulating Crawl Spaces

If you properly insulate your crawl space—in addition to air sealing and controlling moisture, you will save on energy costs and increase your home's comfort.

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Insulating Slab-On-Grade Foundations

Properly insulating your slab-on-grade floors not only will help you save on energy bills, but also will improve your home's comfort.

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Insulating Ducts

Properly insulating air ducts located in unconditioned spaces such as attics, crawl spaces, garages, or unfinished basements can help improve your home's energy efficiency.

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Insulating Walls

Properly insulated exterior walls in your house will not only increase comfort but also help you save on heating and cooling costs. For energy savings, you can add insulation to your walls in an existing house.

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Vapor Barriers

Vapor barriers keep moisture out or in. In a warm home without vapor barriers, moisture in the air can infiltrate the walls, ceilings, and floors, and cause major damage. It will also negatively affect many types of insulation.

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