The thickness of that insulation may vary probably from a slim sheet of polystyrene to as much as in. of polyurethane or polystyrene, with resulting R-values varying possibly from to. They represent some of the leading garage door brand names in the industry. From expert garage door installment to garage http://keeganxadgj.dailyblogzz.com/5698721/best-garage-door-repair-ventura-the-facts