Step-by-step fix
Step 1: Confirm this is the right fix
- Open the door a few inches and look at the gaps around the top and latch side.
- Check for common sagging signs: the top latch-side corner rubs the frame, the latch misses the strike, or the door swings open by itself because it is out of alignment.
- Grab the door handle and gently lift up. Watch the hinges for movement or listen for clicking that suggests loose screws.
- Look at the top hinge first, since that is where sagging problems often show up.
If it works: You can see or feel that the door is dropping on the latch side or moving at the hinges.
If it doesn’t: If the gaps are even and the door still sticks, the problem may be paint buildup, swelling, or a strike plate issue instead of sagging.
Stop if:- The hinge screws will not tighten because the wood is badly split or crumbling.
- The door slab or frame is cracked, twisted, or pulling away from the wall.
- The door is unusually heavy and feels unsafe to support while you work.
Step 2: Tighten every hinge screw first
- Support the door in a relaxed position so it is not hanging hard on the screws.
- Starting at the top hinge, tighten all screws on the door side and frame side.
- Move to the middle and bottom hinges and do the same.
- Close the door and check whether the rubbing or latch problem improved before changing anything else.
If it works: The door feels firmer at the hinges and may already close better.
If it doesn’t: If one or more screws keep spinning or will not snug up, move on to replacing the loose screws.
Stop if:- A hinge leaf is bent, cracked, or pulling out of the mortise.
- A screw head strips so badly that you cannot remove or tighten it safely.
Step 3: Replace loose top-hinge screws with longer screws
- Remove one loose screw at a time from the top hinge on the frame side so the hinge stays in place.
- Drive a longer wood screw through the hinge and into solid wood behind the jamb.
- Repeat for one or two more loose screws at that top hinge if needed.
- Tighten the screw until the hinge leaf sits flat, but do not overdrive it and crush the jamb.
- Test-close the door after each screw so you can see how much the alignment changes.
If it works: The top of the door pulls back toward the hinge side, and the latch side lifts enough to reduce rubbing.
If it doesn’t: If the door improved but still needs a little correction, fine-tune it with a shim or small hinge adjustment.
Stop if:- The longer screw will not bite because the wood behind the jamb is rotten or missing.
- Driving the screw causes the jamb to crack or shift visibly.
Step 4: Fine-tune the alignment with a small hinge shim if needed
- If the latch side still rubs near the top, remove the middle or bottom hinge leaf from the jamb side and place a thin shim behind it.
- Use a wood shim or a piece of thin cardboard as a test shim, and trim it so it stays hidden behind the hinge.
- Reinstall the hinge screws and tighten them evenly so the hinge leaf sits flat.
- Close the door and check the gap again. Add or reduce shim thickness in very small amounts until the reveal looks more even.
If it works: The gaps around the door look more consistent, and the door moves without scraping the frame.
If it doesn’t: If shimming one hinge makes the fit worse, remove that shim and try a thinner one or adjust a different hinge.
Stop if:- The hinge mortise is damaged so badly that the hinge will not sit flat.
- The door binds across multiple edges, which points to a frame or slab problem rather than a simple sag adjustment.
Step 5: Adjust the latch alignment if the door now closes but will not catch
- Close the door slowly and watch where the latch meets the strike plate.
- If the latch is only slightly off, tighten the strike plate screws and see whether that centers it enough.
- If needed, loosen the strike plate screws just enough to shift the plate slightly, then retighten and test.
- Make only small changes so you do not create a new rubbing point.
If it works: The latch enters the strike plate cleanly and the door closes without pushing or lifting.
If it doesn’t: If the latch is still far off after the door itself is aligned, the strike opening may need repair or the frame may be out of position.
Stop if:- The strike area is split, loose, or damaged enough that screws will not hold.
- The latch still misses badly even though the door gaps now look even.
Step 6: Test the repair in normal use
- Open and close the door several times from both sides.
- Check that it does not rub at the top corner, drag on the floor, or pop back open on its own.
- Lock and unlock it if it has a lockset, and make sure the latch catches without slamming.
- Recheck the hinge screws after a day or two if the door was very loose to begin with.
If it works: The door swings smoothly, the gaps stay even, and the latch catches normally in everyday use.
If it doesn’t: If the sag returns quickly, the screw holes or framing behind the jamb likely need a more durable repair than simple adjustment.
Stop if:- The door keeps dropping again right away, which suggests hidden wood damage or a failing jamb.
- The frame moves when the door closes, indicating a larger structural or fastening problem.
FAQ
What usually causes a door to sag?
Most sagging doors come from loose hinge screws, worn screw holes, or a top hinge that is no longer anchored well into solid wood. Heavy use over time slowly pulls the door out of alignment.
Do I need to remove the whole door to fix sagging?
Usually no. Many sagging doors can be corrected by tightening screws, replacing a few hinge screws with longer ones, or adding a thin shim behind one hinge.
Why does replacing the top hinge screws help so much?
The top hinge carries a lot of the door's pulling force. Longer screws can reach solid framing behind the jamb and pull the door back into position better than short factory screws.
Can I bend the hinges instead?
Some people do, but it is easy to overdo it or damage the hinge. Tightening screws and using a small shim is usually a cleaner first repair for a homeowner.
What if the door rubs at the bottom instead of the top?
That can still be a hinge alignment issue, but it may also point to floor movement, a swollen door, or a frame problem. Check the hinge screws first, then look at the overall gap pattern before trimming anything.