Attic Insulation Squish Down

You can use a piece of rigid foam and attach it with cap nails.

Attic insulation squish down.

Subtract the cavity depth from the thickness of the batt in inches. 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. But while many see the benefits of insulating our houses.

When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic. The higher the r value the better the thermal performance of the insulation. Add the right kind of insulation. Here s what they say.

Before blowing in your insulation you ll need to create a barrier to keep the insulation from falling into areas where you don t want it like your walkway or down the attic hatch. 6 25 batt 5 5 cavity depth 0 75. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. The insulation material is compressed the r value decreases by approximately one half of that percentage or x compressed.

Let s look at an r 19 batt in a 2x6 cavity step 1. The north american insulation manufacturers association naima has a little two page document about compressing fiberglass insulation pdf. 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.