How To Build A Attic Knee Wall

Step 1 measure the attic to build your walls to the correct length measure the angle of the rafter by laying a piece of 2x4 inch lumber against the side of the rafter in a vertical position.
How to build a attic knee wall. Install insulation without misalignments compressions gaps or voids in all knee wall cavities. A knee wall is a short vertical wall roughly two or three feet high that blocks in that useless triangular space. Measure and mark the rafters at each end of the attic with the desired height of the knee wall. Install a top and bottom plate or blocking at the top and bottom of all knee wall cavities.
Face the knee wall with the appropriate size of drywall. The higher the knee wall the greater the amount of useful wall space you create in your finished attic. Push the knee wall firmly into place. Do the same thing for the angled top of your knee wall nailing it into the rafters in three or four places.
Install an air barrier on the exterior of attic knee wall insulation and to block open floor joist cavities under attic knee walls. Mark the line that the angle forms along your 2x4. Use your saw to cut along this line.