- Supporting wall material
- Wood framing, masonry, concrete, and steel call for different anchors, tools, embedment details, edge clearances, and installation methods at the jambs.
- Window configuration
- Glazing size, placement, pane type, frames, and retainers affect section layout, finished weight, reinforcement selection, privacy, daylight, and exterior appearance.
- Structural renovation scope
- Combining bays or resizing the opening adds coordination with beam, post, framing, finishing, electrical, design, and municipal requirements outside ordinary door replacement.