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