Most carpenters who frame houses know what a
drywall spacer is, but for those of you who don't, it's time for a
lesson in house framing.
If you're not going to install a skirt board which is another item that
can run the length of the stairway bottom, simply add a 3/4" piece of
scrap building materials onto the side of the stair stringer that's
going to go up against a wall that's going to get drywalled.
Things like these save drywaller's a lot of trouble. If this drywall
spacer wasn't installed correctly, the drywaller would need to
individually cut around each stair step and this is an extremely
difficult task for anyone.
Split Level Stair Framing