- Window configuration
- Glazing size, placement, pane type, frames, and retainers affect section layout, finished weight, reinforcement selection, privacy, daylight, and exterior appearance.
- 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.
- Operator compatibility
- The existing opener, rail, supports, door arm, reinforcement bracket, controls, and safety devices are reviewed against the completed door's weight and geometry.