Insulate Attic Knee Walls

There are as many ways to do it as there are people who do it.

Insulate attic knee walls.

There are two ways to insulate triangular attics behind kneewalls. If you plan to insulate the roof deck of your attic then you would use spray foam or fiberglass batts. Insulating only the attic roof rafters and the walls at the end of the attic is one method some use to insulate the knee wall area underneath but carson dunlop author of principles of home. If you re insulating an attic the knee walls are important.

The best materials for the attic and thus the knee wall are spray foam fiberglass and cellulose. This method can be made to work but the necessary air sealing details are demanding and fussy. One of the best methods is rigid foam board with sealed joints over insulation in the knee wall. The traditional approach is to insulate the kneewall and the attic floor behind the kneewall.

Insulating knee walls other spaces in the attic. Knee walls are found in many older houses where the ceiling on the top floor is an attic or. A better approach is to insulate the roof slope above the attic.