We are trying to cover a really ugly warehouse ceiling with the cheapest product available. It is about 2500 sq ft of 3/12 pitch ceiling. The 2x8 rafters have bat insulation between rafters and 4'x8'x3/4" foam board nailed to the bottoms. We are not concerned about insulation since this is just a big storeroom. If we could use the single sided aluminum house wrap and tape the seams, it could be done for about $400. My notion is to attach it with plywood staples (adjusted so they don't go too deep). The concern is will this cause sweating and make a big mess. The roof is galvalume. There is no HVAC in the room. If this is a bad idea, can anyone advise another cheap solution. Thanks for input. Jim