Floors
Floors over unheated crawl spaces, garages and projections should have at least R12 insulation. In most existing homes, insulation of open floors is easily accomplished with batts installed from below. Be sure to secure the batts with wire mesh or cross-braces. And remember to put the vapour barrier up, to the warm side.The roof of the garage may be a floor for a second-floor room that is already covered in. To upgrade insulation here, use batts or blankets. These can be held snugly to the garage ceiling with either a light lath support or chicken wire.
January 7, 2009