Attic Room Knee Wall Height

In the photo at left the kneewall is the short wall with the door in it.

Attic room knee wall height.

This generally fits areas such as under the eaves of roof lines. Knee walls are short usually wooden walls installed around the sides of an attic where the rafters meet the floor. Common heights of knee walls most knee walls are constructed to reach a height of 36 to 42 inches. 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.

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. You can see the image below for an example of a knee wall. The short wall creates a usable room within the attic while eliminating spaces of the wrong shape or size. This wall is prevalent wherever there are ceiling height changes in the space below such as having a room with 12 foot ceilings next to a room with 10 foot ceilings or in a space with coffered ceilings where very short knee walls may exist or the separation between a cathedral ceiling and an adjacent flat ceiling where the height of the knee wall may go from nothing to three or four feet and often in a situation where there is an attic adjacent to second story space where part of the.

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. But you do so at the expense of floor space. 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. A knee wall is a short vertical wall roughly two or three feet high that blocks in that useless triangular space.