Attic Insulation Squish Down

6 25 batt 5 5 cavity depth 0 75.

Attic insulation squish down.

The higher the r value the better the thermal performance of the insulation. The insulation material is compressed the r value decreases by approximately one half of that percentage or x compressed. Fiberglass insulation a man made mineral fiber con structed from a variety of materials such as sand and recycled glass is the most popular form of insulation in the united states more than 90 percent of homes in america are lined with the pink stuff source. Here s what they say.

Add the right kind of insulation. When you compress fiber glass batt insulation the r value per inch goes up but the overall r value goes down because you have less inches or thickness of insulation. The north american insulation manufacturers association naima has a little two page document about compressing fiberglass insulation pdf. Let s look at an r 19 batt in a 2x6 cavity step 1.

Place a 2 inch by 3 inch board directly on top of the joist nearest to the edge of the attic with its largest. But while many see the benefits of insulating our houses. Walk to one end of the attic by carefully stepping only on the wooden ceiling joists. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and.

When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic. More insulation installation tricks and tips work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just. Subtract the cavity depth from the thickness of the batt in inches.