Yesterday i was doing a home energy rating for quality assurance in augusta georgia and the house i was in had a bonus room.
Attic room knee wall height.
Common heights of knee walls most knee walls are constructed to reach a height of 36 to 42 inches.
In most instances they are no taller than 3 feet but some builders may custom fit them according to the roof s shape and size.
A knee wall is a short vertical wall roughly two or three feet high that blocks in that useless triangular space.
In the photo at left the kneewall is the short wall with the door in it.
Knee walls are short usually wooden walls installed around the sides of an attic where the rafters meet the floor.
Knee walls the walls that separate conditioned from unconditioned space in an attic can be a source of significant air leakage if a continuous air barrier is not provided to prevent unconditioned air from flowing under the knee wall and under the floor boards of the attic room.
As is the case with other types of short walls these walls are also sometimes called pony walls.
The short wall creates a usable room within the attic while eliminating spaces of the wrong shape or size.
Knee walls may support counters or bars and a half height knee wall that borders a stairway and follows the slope of the stairs can function as a stair rail.
The higher the knee wall the greater the amount of useful wall space you create in your finished attic.
Bonus rooms are often the least comfortable room in a house and the main reason is that they are the most flawed part of the building envelope especially the attic kneewalls.
You can see the image below for an example of a knee wall.