Your attic wall will not be a supporting wall.
Walls in attic.
Staple insulation between the wall studs and ceiling joists image a.
At the bottom points of the triangles the rafters meet the top plates of the exterior walls.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Use r 30 insulation for the ceiling and r 13 for the walls.
Carefully measure where each of the new wall studs will go and mark the locations with perpendicular lines across the plates.
Support and follow me.
Tools materials and supplies.
If building a knee wall for storage like karl did with this project make sure to insulate that area as well.
It needs a certain amount of loft to work properly.
If your attic space is framed with rafters and is unfinished it has a triangular shape.
Purchase enough to install a stud on each end of the wall and every 16.
Two by four lumber is standard for framing most walls including short walls in the attic.
Framing basics for attic knee walls along the sides of your loft or attic space.
An attic wall needs to be located near the joists and studs so it can be held in place properly.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
But they are awfully good to have.