A sagging door may rub against the frame, drag across flooring, stick at the top corner, or refuse to latch properly. In many cases, the problem is caused by loose hinges or stripped screw holes—and can often be fixed without replacing the door.
Quick Answer
Why Doors Sag
How to Diagnose a Sagging Door
Tighten Loose Hinge Screws
Use Longer Hinge Screws
Repair Stripped Screw Holes
Shim Hinges if Needed
When House Settling Is the Problem
Fix a Door That Drags on Flooring
When to Replace Hinges
How to Prevent Door Sagging
FAQs
Over time, doors can slowly shift out of alignment as hinges loosen, framing settles, or the weight of the door pulls downward against the jamb.
Even a slight amount of sag can create noticeable problems:
- The latch no longer lines up
- The top corner rubs the frame
- The bottom edge drags
- The door pops open by itself
- The door becomes hard to close
Fortunately, most sagging doors can be corrected with relatively simple adjustments.
Quick Answer
Most sagging doors are caused by:
- Loose hinge screws
- Stripped screw holes
- Worn or bent hinges
- Heavy doors pulling against the jamb
- Minor house settling
In many cases, replacing one upper hinge screw with a longer 2 1/2-inch or 3-inch wood screw pulls the door back into alignment.
Don’s Advice
When a door suddenly starts rubbing at the upper latch-side corner, many homeowners assume the wood has swollen.
But in many cases, the real culprit is simply hinge sag allowing the door to tilt slightly inside the frame.
Why Doors Start Sagging
Every time a door opens and closes, its weight pulls against the hinges and jamb.
Over years of use:
- Screws loosen
- Wood fibers compress
- Hinge holes enlarge
- Heavy doors slowly shift downward
Solid-core and older solid-wood doors are especially prone to sagging because of their weight.
Minor structural settling can also shift the door frame slightly out of square.
As the alignment changes, the reveal—the gap around the door—becomes uneven.
How to Diagnose a Sagging Door
Before making repairs, determine how the door has shifted.
Close the door slowly and examine the reveal around the top and sides.
A sagging door typically shows:
- A narrow or rubbing gap at the upper latch-side corner
- A wider gap near the upper hinge side
- The bottom edge dragging across flooring
- A latch that no longer lines up with the strike plate
You may also notice the door swinging open by itself because it no longer hangs plumb.
| Symptom | Likely Cause |
|---|---|
| Top latch-side corner rubs | Loose upper hinge or sagging door |
| Door drags on floor | Hinge sag or flooring changes |
| Latch misses strike plate | Door shifted downward |
| Door swings open itself | Frame or hinge alignment problem |
| Door rattles when closed | Misaligned strike plate or loose fit |
Tighten Loose Hinge Screws
Start with the simplest fix first.
Open the door and inspect all hinge screws carefully.
Pay special attention to:
- The upper hinge
- Screw heads that stick up from the hinge
- Screws that spin without tightening
Use a screwdriver—not a high-torque drill if possible—to tighten all screws snugly.
Often this alone improves the alignment noticeably.
Check for Movement
While the door is partly open, grasp the handle and gently lift upward.
If the door moves noticeably at the hinges, looseness is likely contributing to the sag.
Don’s Advice
A hinge screw that keeps spinning without tightening usually means the wood behind the jamb has stripped out.
Simply driving a larger screw into damaged wood often doesn’t last very long unless the hole is repaired properly.
Use Longer Hinge Screws to Pull the Door Back Into Alignment
One of the most effective repairs for a sagging door is replacing a short hinge screw with a longer wood screw.
Factory hinge screws are often only about 3/4 inch to 1 inch long and may grip only the jamb itself.
A longer screw reaches into the wall framing behind the jamb and can pull the entire hinge side back into alignment.
1. Remove One Screw From the Upper Hinge
Choose one screw from the hinge leaf attached to the jamb—not the door itself.
2. Install a 2 1/2-Inch or 3-Inch Wood Screw
Drive the screw carefully while watching the reveal around the door.
As the screw tightens, the upper hinge side often pulls inward slightly, lifting the opposite corner of the door.
3. Check the Door Fit Frequently
Close the door periodically while tightening to avoid over-correcting the alignment.
Small adjustments can make a surprisingly large difference.
See also:
How to Fix a Sticking Door
How to Repair Stripped Hinge Screw Holes
If hinge screws no longer tighten securely, the wood fibers inside the hole have worn away.
Repairing the hole gives the screws solid material to grip again.
Simple Toothpick Repair
For minor stripping:
- Remove the screw
- Insert several glue-coated wood toothpicks into the hole
- Break them flush with the surface
- Allow the glue to dry
- Reinstall the screw
Wood Dowel Repair
For badly damaged holes:
- Drill the hole slightly larger
- Glue in a hardwood dowel
- Trim it flush
- Pre-drill a pilot hole
- Reinstall the hinge screw
This creates a much stronger long-term repair.
How to Shim Hinges
Sometimes a door needs slight hinge adjustment rather than pulling the frame tighter.
Thin cardboard or commercial hinge shims placed behind a hinge leaf can subtly reposition the door.
For example:
- Shimming the lower hinge may lift the latch side slightly
- Shimming the upper hinge can alter the reveal differently
Small adjustments matter.
Even a thin shim can noticeably change door alignment.
When House Settling Is the Real Problem
Occasionally, the problem is not the door itself but movement in the house framing.
Signs of structural settling include:
- Multiple sticking doors
- Diagonal drywall cracks
- Sloping floors
- Doors suddenly going out of alignment
- Windows sticking nearby
Minor settling is common in many homes and may stabilize over time.
But significant movement may require evaluation by a contractor or structural professional.
How to Fix a Door That Drags on Flooring
If the bottom edge drags across flooring or carpet, first determine whether sagging hinges are lowering the door.
Common causes include:
- Loose upper hinges
- New thicker carpet or flooring
- Added flooring layers
- Structural settling
Always try hinge corrections before trimming the door itself.
Often restoring proper alignment solves the clearance problem without cutting the door.
If trimming becomes necessary:
- Remove only a small amount
- Seal exposed wood afterward
- Maintain an even bottom edge
When to Replace Door Hinges
Replace hinges if they show:
- Visible bending
- Cracks
- Loose hinge pins
- Excessive wear
- Corrosion or rust
When replacing hinges:
- Match the hinge size carefully
- Match corner radius shape
- Use hinges rated for the door’s weight
Heavy solid-core doors may require heavier-duty hinges than lightweight hollow-core interior doors.
How to Help Prevent Doors From Sagging Again
- Tighten hinge screws periodically
- Lubricate hinges occasionally
- Repair loose screws promptly
- Use long screws in heavy doors
- Control indoor humidity when possible
- Avoid hanging excessive weight on doors
Need Professional Help?
If your door frame has shifted significantly or multiple doors are going out of alignment, a carpenter or door specialist can diagnose the underlying problem.
FAQs
Why does my door rub at the top corner?
Usually because the door has sagged slightly at the hinges, causing the opposite upper corner to bind against the jamb.
Will longer hinge screws really fix a sagging door?
Often yes. Longer screws anchor into the framing behind the jamb and can pull the door back into alignment.
Should I sand a sagging door?
Usually not at first. Always check hinges and alignment before removing wood from the door.
Can house settling cause doors to sag?
Yes. Structural movement can shift the frame and affect door alignment.
How do I know if a hinge is worn out?
Look for bent hinge leaves, loose pins, excessive wobble, or visible wear around the knuckles.
