If you re insulating an attic the knee walls are important.
Insulate attic knee walls.
A better approach is to insulate the roof slope above the attic.
Knee walls are found in many older houses where the ceiling on the top floor is an attic or.
Insulating knee walls other spaces in the attic.
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.
When it comes to insulating knee walls you will want to insulate this space using the same material and method as the rest of your attic.
There are as many ways to do it as there are people who do it.
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.
This is not very easy in most of the older houses we work on because the hatches and attics are too small to get rigid foam board through.
This method can be made to work but the necessary air sealing details are demanding and fussy.
The traditional approach is to insulate the kneewall and the attic floor behind the kneewall.