How to Fix a Sticking or Sagging Interior Door

Few household annoyances are as persistent as a door that sticks, scrapes, or refuses to latch properly. A door sticking problem is common, especially in older homes or with seasonal humidity shifts. While it can be frustrating, the solution is often within reach of a DIYer with basic tools. By methodically diagnosing the issue—whether it’s loose hardware, a swollen door, or a shifted frame—you can usually restore smooth operation without needing to call a professional. This guide walks through the common causes and safe, effective repairs for interior doors, part of our broader Repair Basics series.

Diagnosing the Cause of Door Sticking

Before you grab a screwdriver or plane, take time to pinpoint exactly where and why the door is sticking. This saves effort and prevents unnecessary damage. Start by opening and closing the door slowly, watching and listening for where it makes contact with the frame. Mark these spots with a pencil. Common culprits fall into a few categories:

• Loose Hinge Screws: This is the most frequent cause of a sagging door that sticks at the top corner opposite the hinges. Try wiggling the door up and down when it’s open; if there’s movement, the hinge screws are likely loose.
• Humidity and Swollen Wood: Doors, especially solid wood ones, absorb moisture from the air and can swell. This often causes sticking along the top or lock-side edge during humid months. If the door was fine in winter but sticks in summer, swelling is the likely cause.
• Settling or Warped Frame: Over time, a house settles, or door frames can warp slightly. This can cause the door to bind in multiple spots or fail to latch even when it appears to close.
• Paint Buildup: Multiple layers of paint on the door or frame can create a thick edge that catches.

Your diagnosis will direct you to the right repair, starting with the simplest solutions first. For a broader look at keeping your home in shape, see our Home Maintenance Guide and Seasonal Checklist.

Step-by-Step Fixes for a Sticking Door

Always work from the least invasive fix to the more involved. Start with the hinges, as this solves most problems.

Tighten or Replace Hinge Screws

If the door sags, first try tightening all the screws on all three hinges—both on the door and on the frame. Use the correct size screwdriver to avoid stripping the heads. If the screws spin but don’t tighten, the holes have become stripped and enlarged.

To fix stripped screw holes:

1. Remove the screw from the stripped hole.
2. Insert wooden toothpicks, wooden matchsticks (with the heads removed), or specialized wooden dowels into the hole. You can add a dab of wood glue for a permanent fix.
3. Break or cut the inserts flush with the surface.
4. Re-drive the screw. The new wood will give the screw threads something to bite into.

For a stronger, long-term repair, you can replace the old short screws with longer ones (at least 3 inches) for the top hinge. Longer screws reach into the solid wood of the wall stud behind the door jamb, pulling the frame back into alignment.

Adjust Hinges with Shims

If tightening screws doesn’t fully correct the sag, you can fine-tune the door’s position by shimming the hinges. This involves placing thin material behind a hinge leaf to change its position.

To shim a hinge:

1. Place a wedge under the door to support its weight.
2. Remove the screws from the hinge leaf on the door or the frame (not both).
3. Slide your shim behind the leaf, trimming it to fit the leaf’s outline.
4. Reinstall the screws, tightening them fully. The shim will push that side of the hinge out slightly, shifting the door’s position.

Planing the Door Edge (Last Resort)

If the door itself is swollen or the frame has shifted, and hinge adjustments aren’t enough, you may need to remove material from the door. Planing should be your last resort after exhausting other adjustments.

How to plane a door:

1. Remove the door from its hinges by tapping out the hinge pins with a hammer and punch or screwdriver. Have a helper or use sturdy sawhorses to support the door.
2. Re-mark the exact area that is sticking. Plane only this high spot, not the entire edge.
3. Using a sharp hand plane or power planer, take off thin, even shavings. Work from the ends of the door toward the middle to avoid splintering the corners.
4. Frequently test the door’s fit by re-hanging it. It’s easy to take off too much.
5. Once the door closes smoothly, sand the planed edge smooth and immediately seal the bare wood with primer and paint or a clear sealant. This prevents future moisture absorption and swelling.

Sealing Bare Edges

After any planing or sanding that exposes raw wood, sealing those edges is critical. Unsealed wood is hygroscopic, meaning it readily absorbs moisture from the air, which will cause the door to swell and stick again. Apply a coat of primer, followed by paint, or use a clear polyurethane or shellac on all six sides of the door (top, bottom, and all edges) for best protection.

When to Call a Professional

While the fixes above work for most interior doors, some situations require a professional’s expertise. Knowing when to call for help is a key part of safe home maintenance.

• Exterior Doors: Exterior doors are heavier, have weatherstripping and security hardware, and are critical for home insulation and safety. Adjusting them often requires specialized knowledge.
• Structural Frame Issues: If the entire door frame is racked (leaning like a parallelogram) or shows large gaps from the wall, the problem may be with the wall itself, requiring a carpenter or contractor.
• Lead Paint Concerns: As noted in the safety box, if you have pre-1978 home and are not comfortable or equipped to follow EPA lead-safe work practices, hire an EPA-certified renovator.
• Related Systems: If the sticking door problem is related to suspected plumbing leaks (causing wood swelling), electrical wiring run through the frame, or a load-bearing wall, contact the appropriate licensed professional.

For any work that involves significant height, remember to practice Ladder Safety.

Frequently Asked Questions

Why does my door only stick in the summer?

This is almost always due to humidity. Wood absorbs moisture from the air, causing doors to swell. The door edge expands and rubs against the frame. In drier winter months, the wood shrinks and the problem disappears. The long-term fix is to ensure all edges of the door are properly sealed to block moisture.

Can I fix a sticking door without taking it off the hinges?

Yes, for many issues. Tightening screws, shimming hinges, and even minor sanding of a painted edge can often be done with the door in place. For more material removal or to seal the top and bottom edges properly, removing the door is necessary.

What if the door frame is the problem, not the door?

If the frame is warped or out of square, the solutions become more complex. Sometimes, adjusting the hinge placement on the frame or carefully planing the door stop moulding can help. For severe cases, a professional may need to re-shim or replace the door jamb.

My door won’t latch. Is that the same as sticking?

It’s often related. A sagging door will drop so the latch no longer aligns with the strike plate on the frame. The fixes are the same: tighten hinge screws or shim the hinges to raise the door back into alignment. You may also need to slightly adjust the position of the strike plate.

How can I prevent doors from sticking in the future?

Keep all door edges, especially the top and bottom, well-sealed with paint or varnish. Maintain a consistent indoor humidity level with a dehumidifier or humidifier if possible. Periodically check and tighten hinge screws as part of your home maintenance routine to catch problems early.