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Where Should I Insulate?

The more you insulate, the more your energy savings can add up. Insulating attics, walls, ceilings, and crawl spaces can have a dramatic effect on your energy savings, and can create a more comfortable home year-round.

Insulating for Optimal Results

The thermal envelope establishes a boundary. Heated and/or cooled areas are entirely enclosed by the envelope. Unconditioned spaces such as the attic, crawl spaces and the garage are outside the thermal envelope. You should insulate all exterior walls that separate conditioned spaces from unconditioned spaces. Insulating attics closes the thermal envelope from above.

To further ensure the conditioned living spaces of the home are enclosed, all cracks or openings should be filled with insulation. To control heat leakage, apply caulk or foam sealants around openings like window and door frames and any openings where wires or pipes go through the envelope.

Insulation is also used in interior walls, ceilings and floors for sound control and sometimes to create a thermal envelope from room to room.

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