Garage Door

Sectional Garage doors are usually constructed of three to eight panels and slide up and overhead. Sectional Garage doors occupy exactly the same amount of internal garage space as a monolithic door. Sectional doors have two advantages over single panel monolithic doors:[6]

• Sectional doors do not require any space outside the garage to open. A vehicle may park very close to the garage before opening the door.
• Each panel of a sectional door has its own connection to the door track. This increases reliability and robustness compared to monolithic doors, which have only a few track connections for the whole panel.

Garage doors can be made out of many materials, but steel, aluminum, wood, copper, glass, and vinyl (polyethylene) are the most popular materials. Some manufacturers incorporate foamed-in-place polyurethane insulation within the monolithic panel and sectional garage doors.