- Jamb and framing condition
- Sound mounting faces support accurate anchorage. Split lumber, weak blocking, deteriorated material, or unfinished structural changes may require coordinated preparation before door installation.
- Counterbalance system
- Door weight, height, drums, shaft arrangement, lift type, and spring cycle choice determine the torsion components and setup needed for balanced movement.
- Removal and site access
- Old door construction, damaged components, interior storage, vehicle access, finished surfaces, and the route for full-width sections shape labour and handling plans.