- Section construction
- Single-skin, insulated, and composite-core sections differ in weight and structure. The chosen profile and thickness affect the door package and counterbalance requirements.
- Headroom and ceiling obstructions
- Low ceilings, beams, ducts, lighting, heaters, storage racks, and sloped roofs can change the lift arrangement, rear supports, and installation access.
- Insulation and finish
- Thermal construction, interior backing, panel profile, exterior colour, decorative elements, and corrosion-resistant finishes determine the selected door sections and related hardware.