definitely listen to 49 tnc. even i screwed up and didn't put a pipe in for electrical, and i teach the stuff!! have to use a 3/4" hammer drill now to make room for 1/2" conduit. all i need are a coupla lights, its a former shed i'm selling off in a coupla months. i used 6 yards of fiber mesh mix for the "mono-pour" footings and slab at same time for a 12x22" garage. on the week ends it is $10 more per yard. it came to $580. my bud did the finish work. now i have to price a roll up door.