How to Fix a Sagging Door: A Complete Step-by-Step Guide for 2026

A sagging door can make everyday life frustrating. It may scrape against the floor, stick to the doorframe, leave uneven gaps, or refuse to latch properly. Fortunately, most sagging doors can be repaired without replacing the entire door or hiring a professional carpenter. With a few basic tools, the right troubleshooting method, and some patience, we can often restore a door to its proper position.

Understanding how to fix a sagging door begins with identifying the underlying problem. Loose hinges, worn screws, stripped screw holes, a shifting doorframe, and changes in humidity can all cause a door to drop out of alignment. By diagnosing the cause before making adjustments, we can complete the repair more effectively and prevent the problem from returning.

This comprehensive guide explains how to inspect a sagging door, tighten or repair its hinges, correct alignment problems, and determine when professional assistance may be necessary.

1. Identify Why the Door Is Sagging

Before starting any repair, we should determine why the door is no longer hanging correctly. A door that rubs against the upper corner of the frame may have a different problem from one that scrapes along the floor.

The most common causes include:

• Loose hinge screws: Repeated opening and closing can loosen the screws holding the hinges to the door or frame.
• Stripped screw holes: Screws may spin without tightening because the surrounding wood fibers have worn away.
• Worn or damaged hinges: Bent hinge leaves, worn pins, or damaged hardware can allow the door to drop.
• Heavy door construction: Solid wood doors and doors with heavy decorative panels place greater stress on their hinges.
• Doorframe movement: A shifting frame can change the door’s alignment even when the hinges remain secure.
• Humidity and wood expansion: Solid wood can expand, contract, or warp as moisture levels change.
• Improper installation: Hinges that were installed incorrectly or positioned unevenly may cause long-term alignment problems.

How to Recognize the Problem

Close the door slowly and examine the gaps around its edges. Ideally, the gaps should be reasonably consistent along the top and sides.

If the gap narrows near the upper hinge-side corner or the door rubs against the opposite upper corner, the door may have dropped. If it scrapes along the floor, the lower edge may have shifted because of loose hinges, frame movement, or changes in the door itself.

We should also inspect the hinges for missing screws, visible movement, rust, and bent metal. Gently lift the door handle side while the door is slightly open. If the door moves upward noticeably, loose hinges or worn hardware may be responsible.

2. Tighten the Door Hinges and Screws

The simplest way to fix a sagging door is often to tighten its existing hinge screws. Loose screws allow the door’s weight to pull the hinge away from the frame, gradually changing its position.

Tools Required

Before beginning, gather the following items:

• A Phillips or flathead screwdriver, depending on the screws
• A suitable drill and driver bit, if needed
• A flashlight
• A wooden wedge or doorstop
• Safety glasses

Step-by-Step Instructions

Step 1: Support the door. Open the door slightly and place a wooden wedge beneath it to reduce pressure on the hinges. Heavy doors may require assistance from another person.

Step 2: Inspect every hinge. Check the top, middle, and bottom hinges for loose screws. The top hinge deserves particular attention because it often carries substantial stress from the weight of the door.

Step 3: Tighten the screws. Use a screwdriver to tighten loose screws gradually. Avoid overtightening, which can damage the screw head or surrounding wood.

Step 4: Test the alignment. Remove the wedge carefully, open and close the door, and check whether it still rubs against the frame.

Step 5: Repeat if necessary. If the door remains misaligned, inspect the screw holes and hinge positions before making further adjustments.

If tightening the screws resolves the problem, no additional repair may be necessary. However, if a screw turns continuously without becoming secure, its hole may be stripped.

3. Repair Stripped Screw Holes in the Door or Frame

When screws cannot grip the wood, simply tightening them will not solve the problem. We need to restore the material that holds the screws in place.

One reliable method for minor damage is to fill the stripped hole with wooden toothpicks or small wooden dowels and wood glue.

Using Wooden Toothpicks

1. Remove the loose screw from the affected hinge.
2. Inspect the hole to confirm that the wood is not severely cracked or rotten.
3. Apply a small amount of suitable wood glue to several wooden toothpicks.
4. Insert the toothpicks into the hole until it is filled securely.
5. Break or trim the excess material so it sits flush with the surface.
6. Allow the glue to dry according to the manufacturer’s instructions.
7. Reposition the hinge and reinstall the screw carefully.

For larger holes, a properly fitted wooden dowel may provide a stronger repair. Drill out the damaged area only when necessary and when we can do so safely without damaging the frame or door.

When Longer Screws Are Better

If the hinge is attached to a wooden doorframe and the existing screw holes are weak, a longer screw may reach the structural framing behind the jamb. This can provide stronger support than a short screw anchored only in the door casing.

Choose a screw of an appropriate diameter and length, and ensure that it does not penetrate hidden wiring, plumbing, or other components. Use a screw designed for the application rather than forcing an oversized fastener into the hinge.

Important: Do not overtighten longer screws. Excessive force can pull the hinge out of position, damage the frame, or distort the door alignment.

4. Adjust the Hinges to Correct Door Alignment

If the screws are secure but the door still sags, the hinges may need adjustment. This is particularly common with older doors or doors that have been used frequently over many years.

Check the Top Hinge First

The top hinge often experiences significant leverage when the door is opened. Even a small amount of movement at this hinge can produce noticeable misalignment at the opposite corner.

Inspect the hinge leaves to ensure they sit flat against the door and frame. If a hinge is visibly bent, cracked, or severely worn, replacement is usually preferable to attempting to straighten it.

Adjust the Hinge Position

If the hinge is installed incorrectly, we may need to reposition it slightly.

1. Support the door securely before removing any hinge screws.
2. Remove the necessary screws from the affected hinge.
3. Check whether the mortise, the recessed area where the hinge sits, is damaged or positioned incorrectly.
4. Correct the mounting surface or repair the screw holes as needed.
5. Reinstall the hinge so it sits flat and aligned with the corresponding hinge leaf.
6. Tighten the screws and test the door.

For a small alignment correction, a thin hinge shim can sometimes help. A shim placed behind an appropriate hinge leaf changes its position relative to the frame. However, the correct location depends on the direction of the misalignment.

We should make small adjustments and test the door after each change. Adding shims randomly can create new problems, including uneven gaps and poor latching.

If the door uses specialized adjustable hinges, consult the manufacturer’s instructions before turning adjustment screws.

5. Fix a Sagging Door That Scrapes the Floor

A door that rubs against the floor may need hinge repairs, but the cause could also be a swollen door, uneven flooring, or a shifted frame.

Determine Where the Door Is Rubbing

Open and close the door slowly. Look for polished areas, scratches, or worn paint along the bottom edge. Check whether the rubbing occurs throughout the swing or only near one position.

If the door rubs at the upper latch-side corner, tightening or repairing the hinges may lift the door enough to solve the issue.

If the entire bottom edge scrapes the floor, the door may have expanded because of humidity, or the floor covering may have changed.

Correct the Problem Before Trimming

First, tighten loose screws, repair stripped holes, and check the hinge alignment. These repairs may restore adequate clearance without removing material from the door.

If the door has swollen seasonally, improving ventilation and reducing excessive indoor humidity may help. Allow the door to dry and stabilize before considering permanent changes.

When Trimming Is Necessary

If the door continues to scrape after the hinges are corrected, carefully trimming a small amount from the bottom edge may be appropriate.

Remove the door only if we can support it safely. Measure the required clearance, mark the cut accurately, and use suitable cutting equipment with appropriate eye and hearing protection. Protect the finished surface afterward.

Before trimming, check whether the door is hollow-core, solid wood, composite, or fire-rated. Hollow-core doors have limited material at their edges, and fire-rated doors must not be modified in ways that compromise their certification.

Never trim a fire-rated door without confirming that the modification is permitted by the applicable listing and manufacturer’s instructions.

6. Repair or Replace Damaged Door Hinges

Sometimes the problem is not the screws or the frame but the hinge itself. Hinges can become bent, corroded, worn, or damaged after years of supporting a heavy door.

Look for these warning signs:

• A hinge pin that moves excessively
• Bent hinge leaves
• Cracks around the screw holes
• Rust that interferes with movement
• Grinding, squeaking, or unusual resistance
• A hinge that no longer sits flat against the mounting surface

How to Replace a Damaged Hinge

Choose a replacement hinge that matches the existing hardware in size, thickness, screw-hole spacing, and load capacity.

Support the door before removing the old hinge. Depending on the door’s weight and hinge arrangement, it may be safer to replace one hinge at a time rather than removing all hinges simultaneously.

Install the new hinge in the existing mortise, ensuring that its leaves sit flush. Secure the screws without overtightening, then test the door’s movement.

If the door is unusually heavy, consider whether the existing hinge type and number of hinges are appropriate. Adding another hinge can sometimes improve support, but only when the door and frame can accommodate it correctly.

Lubricating suitable hinge pins with an appropriate lubricant may reduce squeaking. However, lubrication will not correct a bent hinge or stripped screw holes.

7. Prevent Future Door Sagging and Know When to Call a Professional

Once the door is aligned, a few simple maintenance practices can help prevent the problem from returning.

Preventive Maintenance Tips

• Inspect hinge screws periodically: Tighten loose screws before they allow the door to drop.
• Avoid hanging excessive weight on the door: Heavy organizers, hooks, and other attachments can increase stress on the hinges.
• Control indoor humidity: Stable moisture levels help reduce swelling and movement in solid wood doors.
• Keep hinges clean: Remove dirt and apply suitable lubricant when necessary.
• Use appropriate hardware: Heavy doors require hinges and fasteners rated for their weight and intended use.
• Check the doorframe: Watch for cracks, soft wood, and signs of moisture damage.

When Professional Help Is Necessary

Contact a qualified carpenter or door technician if the frame is badly cracked, the jamb is pulling away from the wall, the door is severely warped, or repeated adjustments fail to correct the problem.

Professional assistance is also advisable when the door is exceptionally heavy, the hinges are part of a specialized security system, or the door is fire-rated and requires regulated repairs.

If the doorframe has shifted because of structural movement, repairing the hinges alone may provide only temporary relief. The underlying frame problem must be addressed.

Conclusion: The Best Way to Fix a Sagging Door

Learning how to fix a sagging door can save time, money, and the inconvenience of replacing an otherwise serviceable door. In many cases, the solution begins with tightening loose hinge screws and checking whether the top hinge has moved away from the frame.

When screws no longer grip, wooden fillers or dowels can restore their holding power. Misaligned hinges may require careful repositioning or suitable shims, while damaged hardware should be replaced with compatible components. Doors that scrape the floor may need additional investigation to determine whether the problem comes from sagging, humidity, flooring changes, or a shifted frame.

The most effective approach is to identify the cause first, make small adjustments, and test the door after each repair. Avoid unnecessary trimming or major modifications until simpler solutions have been ruled out.

With the right tools and a systematic repair process, we can often restore smooth opening and closing, improve the door’s appearance, and extend the life of the existing hardware. When structural damage or specialized door requirements complicate the repair, professional help ensures the door remains safe, secure, and properly aligned.