Most sagging doors can be fixed without replacing the door. The first things to check are the hinge screws, hinge condition, and door-frame alignment. In many cases, tightening loose screws or reinforcing the top hinge with a properly sized longer screw is enough. If that does not solve the problem, the next options include repairing stripped screw holes, shimming the hinges, adjusting the strike plate, or addressing a shifted door frame.
How Do You Know If a Door Is Sagging?
A sagging door has moved out of its original alignment, usually around the hinge side. The latch-side corner may drop, causing the door to rub against the floor or frame.
Common signs include:
- The door scrapes the floor or threshold.
- The top latch-side corner rubs against the frame.
- The door is difficult to close.
- The latch no longer lines up with the strike plate.
- You need to lift or push the door to make it latch.
- The gap around the door is uneven.
- The door appears lower on the latch side.
Not every sticking door is actually sagging. A warped door, swollen wood, damaged hinge, misaligned strike plate, or shifted frame can produce similar symptoms. Identifying the cause first prevents unnecessary repairs.
What Causes a Door to Sag?
Loose Hinge Screws
Loose hinge screws are one of the most common causes. The door’s weight continuously loads the hinges, and screws can gradually lose their grip in the jamb.
The top hinge deserves particular attention because it carries much of the door’s load.
Stripped Screw Holes
If a hinge screw spins without tightening, the wood surrounding the screw may be stripped.
Simply driving the same screw back into the damaged hole usually will not provide a lasting repair. The hole needs to be repaired or the hinge needs to be anchored into sound framing.
Worn or Damaged Hinges
A bent hinge, worn hinge knuckle, loose hinge pin, or damaged hinge leaf can allow the door to drop even when the screws are tight.
Heavy Door
Solid-core interior doors and heavy exterior doors place greater loads on their hinges. If the hardware or frame was not adequately installed for the door’s weight, alignment problems can develop over time.
Door Frame Movement
The problem may be in the frame rather than the door.
Settlement, installation problems, seasonal movement, or changes in the surrounding structure can cause the jamb to move out of square. In this situation, adjusting the hinges may only provide a temporary solution.
Wood Movement or a Warped Door
Wood expands and contracts with changes in moisture. Exterior wood doors can therefore develop seasonal clearance problems.
A warped or twisted door slab is also different from a simple hinge-related sag. If the door itself is no longer straight or square, hinge adjustments may not completely solve the problem.
Diagnose the Door Before Repairing It
Before removing hardware or sanding the door, check where the problem is coming from.
| Symptom | Likely Cause | First Repair to Try |
|---|---|---|
| Door drops on the latch side | Loose hinge connection | Tighten hinge screws |
| Screw spins without tightening | Stripped screw hole | Repair the hole |
| Door is slightly out of alignment | Hinge positioning | Adjust or shim hinge |
| Hinge is visibly damaged | Worn or bent hinge | Replace hinge |
| Door closes but latch misses the strike | Minor alignment problem | Check hinge alignment and strike plate |
| Door slab is bowed or twisted | Warped door | Repair or replace door |
| Jamb is visibly out of square | Frame movement | Re-shim or repair frame |
A useful test is to open the door partway and gently lift the handle. If the door moves noticeably at the hinges, a loose hinge connection is likely contributing to the problem. This type of hinge check is also recommended in current repair guidance.
How to Fix a Sagging Door
Start with the simplest repair and only move to more invasive solutions if the problem remains.
1. Tighten the Hinge Screws
This should be the first repair.
Open the door and inspect all hinge screws, paying particular attention to the top hinge.
Look for:
- Loose screws
- Screw heads that sit above the hinge
- A hinge leaf pulling away from the jamb
- Cracked wood around the screw holes
Use a screwdriver to tighten the screws firmly but carefully. Avoid excessive force, particularly with softwood jambs, because overtightening can damage the screw holes.
After tightening the hinges, close the door and check the gaps around the frame.
If the door returns to proper alignment, no further repair may be necessary.
2. Replace a Short Top-Hinge Screw With a Longer Screw
If tightening the screws does not solve the problem, a longer screw may provide a stronger connection.
Many standard hinge screws are relatively short and primarily grip the door jamb. A properly selected longer screw can pass through the jamb and engage the structural framing behind it.
A commonly used repair is a 2½- to 3-inch screw in an appropriate location on the top hinge.
The important point is not simply to use the longest screw available. The screw needs to be suitable for the hinge and long enough to reach solid framing without creating other problems.
How the Long-Screw Repair Works
A longer screw can:
- Pass through the hinge.
- Pass through the jamb.
- Reach solid framing behind the jamb.
- Pull the hinge side into a more secure position.
As the hinge connection becomes more secure, the latch side of the door can move back toward its correct position.
Current repair guides continue to recommend this approach as one of the first solutions for a hinge-related sag.
Important: Do Not Use a Longer Screw Blindly
Before installing a longer screw, consider:
- Jamb thickness
- Location of the wall framing
- Sidelights or glass beside the door
- Wiring or plumbing
- Screw head compatibility
- The condition of the framing
A longer screw only helps if it reaches sound material that can actually support the hinge.
Also, do not automatically replace every hinge screw with a long screw. Over-adjusting the frame can create new alignment problems.
3. Repair Stripped Hinge Screw Holes
If a screw spins freely without tightening, the hole is likely stripped.
For a small damaged hole, a traditional repair is to fill the hole with small pieces of wood and wood glue.
Basic repair:
- Remove the loose screw.
- Fill the damaged hole with suitable wood material and adhesive.
- Allow it to cure.
- Trim the repair flush.
- Drill an appropriate pilot hole.
- Reinstall the hinge screw.
For more extensive damage, a wooden dowel can provide a stronger repair.
Do not rely on simply installing a larger screw into severely damaged wood. A properly repaired hole provides a much more reliable fastening point.
4. Adjust the Hinges With Shims
If the screws are secure but the door remains slightly out of alignment, the problem may be related to hinge geometry.
A thin shim placed behind a hinge leaf can change the hinge position and alter the door’s alignment.
Suitable materials can include:
- Purpose-made hinge shims
- Thin plastic
- Thin cardboard
The exact shim position depends on the direction of the misalignment, so start with a very thin shim and test the door before adding more.
This is an adjustment rather than a repair to damaged hardware.
Current guidance also describes hinge shimming as a way to correct uneven gaps after loose screws and longer screws have been ruled out.
5. Replace Worn or Damaged Hinges
If the screws are secure but the hinge itself has excessive movement, inspect the hinge closely.
Replace a hinge if it has:
- A bent leaf
- Excessive wear
- A damaged pin
- Loose knuckles
- Visible deformation
Use a replacement hinge that matches the existing hinge dimensions and is appropriate for the door’s weight.
For a heavy exterior door, selecting hardware with adequate load capacity is particularly important.
6. Adjust the Strike Plate
Sometimes the door is no longer perfectly aligned, but the hinge system itself is not the main problem.
If the door closes normally but the latch misses the strike plate slightly, the strike plate may need adjustment.
Before moving it, confirm that the door itself is properly positioned.
Then:
- Close the door slowly.
- Observe where the latch contacts the strike.
- Determine the direction of the required adjustment.
- Loosen the strike plate screws.
- Move the plate slightly.
- Retighten and test the door.
A small strike-plate adjustment can solve a minor latching problem without altering the door or hinges.
7. Check the Door Frame
If the hinges are tight, the door is not warped, and the problem continues, inspect the frame.
Check whether the jamb is:
- Plumb
- Square
- Securely fastened
- Properly shimmed
Look for an uneven gap that changes substantially from the top to the bottom of the opening.
If the frame itself has moved, the problem is no longer simply a sagging hinge. The jamb may need to be re-shimmed, re-fastened, or otherwise repaired.
A door-frame problem cannot always be solved by adding more hinge screws.
8. Sand or Plane the Door Only as a Last Resort
Do not immediately plane the bottom of a door simply because it rubs the floor.
First rule out:
- Loose hinges
- Stripped screw holes
- Damaged hinges
- Hinge misalignment
- Frame movement
- Wood swelling
If the door is correctly supported and aligned but still has a small area of interference, carefully removing a limited amount of material may provide the required clearance.
Remove as little material as possible and test the door frequently.
Once wood has been removed, it cannot be put back.
How to Fix a Sagging Front Door
Front doors often require more attention because they are heavier and are exposed to weather.
Start by checking the hinge screws and top hinge.
Then inspect:
- Hinge size and condition
- Screw anchoring
- Door-frame alignment
- Weatherstripping
- Threshold clearance
- Moisture-related swelling
If the door has sidelights or a complex frame system, be especially careful when installing longer screws. Confirm what is behind the jamb before drilling or driving longer fasteners.
If the door has suddenly become difficult to close after years of normal operation, check the hinges and frame before modifying the door itself.
How to Fix a Sagging Interior Door
Interior doors are often easier to correct because they are lighter and have simpler frames.
The recommended sequence is:
- Tighten the hinge screws.
- Check the top hinge.
- Repair stripped holes.
- Use an appropriate longer screw if the hinge needs stronger anchoring.
- Shim the hinge if alignment remains incorrect.
- Adjust the strike plate if necessary.
If an interior door suddenly starts rubbing after years of normal operation, avoid assuming that the door itself needs to be cut down.
The change may be caused by hinge movement or frame alignment.
When Is a Sagging Door a Structural Problem?
A door that repeatedly returns to the same misalignment after hinge repairs may have a larger problem.
Look for:
- A jamb that is visibly out of square
- Cracks around the door opening
- Multiple doors becoming difficult to close
- Windows also developing alignment problems
- Large changes in the door reveal
- A frame that has visibly shifted
If these symptoms are present, the issue may involve building movement or the door opening rather than the hinges alone.
In that situation, repeatedly tightening screws or trimming the door will not address the underlying cause.
Can You Fix a Sagging Door Without Replacing It?
In many cases, yes.
A door can often be repaired when the problem is caused by:
- Loose screws
- Stripped hinge holes
- Minor hinge movement
- Worn hinges
- Small alignment issues
- Strike-plate misalignment
Replacement becomes more reasonable when the door itself is severely warped, structurally damaged, rotten, or when the frame has extensive damage.
The fact that a door is sagging does not automatically mean the door needs to be replaced.
How to Prevent a Door From Sagging Again
Once the door is properly aligned, basic maintenance can help prevent the problem from returning.
Check hinge screws periodically
Loose screws are easier to fix before they damage the surrounding wood.
Use appropriate hinges
Heavy doors require hinges capable of supporting their weight.
Avoid overtightening
Excessive force can strip the wood around the screw.
Address damaged hinges early
A worn hinge can place additional load on the remaining hinges.
Protect exterior wood doors
Proper sealing and maintenance can reduce moisture-related movement.
Address frame movement
If the jamb continues to shift, repairing the hinges alone will not provide a lasting solution.
Final Thoughts
Most sagging doors do not need to be replaced. Start by checking the hinge screws and top hinge, then repair stripped holes or reinforce the hinge connection with an appropriately sized longer screw if necessary.
If the door remains misaligned, move on to hinge shimming, hinge replacement, strike-plate adjustment, and frame inspection. Only consider sanding or planing the door after the underlying alignment problem has been ruled out.
The key is simple: diagnose the cause before modifying the door.
If your sagging door needs to be replaced, contact wang@gddlsn.com to discuss the right replacement door for your project.