Before revision: In this method, wooden panels were nailed over the beams and joists of a house frame, and a heavy, loosely woven cloth, called scrim, was then stapled or tacked over the top of this .
After revision: In this method, wooden panels were nailed over the beams and joists of a house frame, and a heavy, loosely woven cloth, called scrim, was then stapled or tacked over the wood panels .