A knee wall is a partial height wall that extends from the attic floor to the bottom of the rafters.
Attic knee wall framing.
Its purpose is to create flat vertical walls in the attic space.
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The knee wall in an attic drops down from the rafter to hide the pointed angle where the rafter meets the attic floor and to make the attic feel a bit more like a regular room.
The knee wall will be built on the floor of the attic and then tipped into place against the rafters.
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.
There are two ways to block off this air flow.
Support and follow me.
The space behind the.
If you aren t sure whether or not your attic contains knee walls go and look around the edges.
You can see the image below for an example of a knee wall.
Scribe a line on your scrap piece along the angle formed by the rafter.
Unlike other kinds of knee walls this kind of wall extends all the way to the rafters but because of the slope of the roof it is shorter than a full height wall.
Determine the angle of rafters by setting the scrap piece of 2x4 in a vertical position against the side of a rafter.
One of your 2x4s will act as the bottom of your wall and will not be cut.
Knee walls are short usually wooden walls installed around the sides of an attic where the rafters meet the floor.
What are knee walls.