garage

I've seen guys take clear heavy gauge plastic nail it to the ceiling with furring strips{1X2} and a 1"-1 1/2" dowel rod stapled to the bottom. Roll it up and tie off with what ever when you want the area open. When you want that certain area sealed off, just drop the plastic to the floor. Works great to keep that area fairly clean. The guys usually did this for making a paint booth.

Jim

Jim