The wall is "temporary" (Jen says 15 years :), so I built a simple frame of 2x4's and covered it with heavy plastic. I'll affix sheetrock to the other side from the floor to the cross-bracing (4 feet) so that the Bee can play on the other side and not break thru. The plastic is to keep sawdust contained in the shop and out of the rest of the house. I put the door at a 45 degree angle just for fun.