8x7 Garage Doors Modern Design Overhead Garage Doors Panel

Steel garage doors are the most common and economical types on the market. Most manufacturers offer several colors from the factory, and many models can be painted to match your home. There are three types to choose from: (1) Single-layer doors are stamped from a single sheet of galvanized steel. These are usually the most economical of all steel doors. (2) Double-layer steel doors have a galvanized steel skin on the outside with a thick layer of either polystyrene or polyurethane as a backer. The backer provides soundproofing and additional insulating value to the door. (3) Triple-layer doors are constructed of the same materials as double-layer doors, with the addition of a galvanized skin on the inside to protect the polystyrene/polyurethane from damage. The additional layer of steel makes triple-layer doors the strongest, most secure and most soundproof of all garage doors. These are also available with thicker insulation for greater R-value (a measure of thermal resistance).