Overview
Sagging = the door corner opposite the top hinge is dropping. Usually top hinge loose, worn, or the door has never been adjusted since fitting.
Symptoms
- Latch corner scrapes the frame or threshold.
- Visible tilt.
Common causes
- Loose top hinge.
- Worn top hinge.
- Poor original installation.
When to call a professional
- Hinge replacement or refit.
Prevention
- Annual screw check.