Quick answer
Moving does not have to damage a piano to affect tuning. The new room's humidity, temperature, floor, sunlight and air movement can all change how stable the piano feels after delivery.
Main causes
- Humidity and temperature difference between old and new rooms.
- Seasonal change, especially winter dryness and summer humidity.
- Vibration and movement during transport.
- Older piano condition, loose tuning pins or previous lack of maintenance.
What to do after delivery
- Place the piano away from vents, direct sun and damp walls.
- Let it adjust to the new room before final tuning when appropriate.
- Schedule tuning and ask whether pitch correction or repair is needed.