Sectional Overhead Doors are vertical sliding doors made from insulated panels. The panels are made of CFC free polyurethane foam stacked in between two metal skins. These type of doors can be installed with different specifications, including standard lift, vertical lift or hi-lift. The basic design consists of insulated panels, vertical tracks, horizontal tracks and rollers. These types of doors are manually or electrically operated. Sectional Doors are used in warehouses, cold storage rooms and loading bays.