A sagging door is the kind of small problem that produces a daily reminder. The latch catches at the wrong height. The bottom of the door drags on the threshold. The hinge side has a visible gap where there should be wood-on-wood contact. Most of the time you can correct a sagging door in under an hour with simple tools, and most of the time the fix does not involve removing the door at all. This guide covers the four most common repair methods, in order from least invasive to most invasive, plus the signs that say the door has moved past a DIY repair.
How do you fix a sagging door without removing it? Open the door, support its weight on a wedge or shim under the latch side, and tighten the top hinge screws first. If the screws spin in place, replace them with three-inch screws that bite into the framing behind the jamb. Most sagging doors lift back into alignment from that one adjustment alone.
If the door has dropped far enough that the latch will not engage at all, or the screws strip every time you tighten them, a craftsman who specializes in door installation and repair can rehang the door and rework the jamb so the fix lasts.
Understanding Why Doors Sag
A door does not sag because the door itself shrinks. It sags because the hinges, the screws, or the jamb that holds them all has shifted out of position. Wood swells and contracts with humidity. Hinge screws back out under the constant load of the door's weight. Drywall and framing settle. Any of those causes makes the door drop on the latch side, and that drop is what produces the drag, the gap, and the latch misalignment you see.
Diagnosing the cause before you start the repair saves time. Close the door slowly and watch where it catches. A door that catches at the top corner on the strike side has dropped on the hinge side, which is the most common pattern. A door that catches along the bottom only is usually a swollen or warped door rather than a true sag. A door with a visible gap along the hinge side has loose hinges that need re-anchoring.
Method 1: Tightening Loose Hinges
Start here. Loose hinge screws are the number one cause of sagging doors, and re-tightening them solves the problem about half the time.
Open the door fully and support the bottom of the latch side with a wedge, shim, or thin block of wood so the door is held in its proper closed position. This takes the weight off the hinges while you work. With a Phillips screwdriver or a cordless drill on low torque, tighten every screw in every hinge, working from the top hinge down. The top hinge carries the most load and is the most likely to be loose.
If a screw turns freely and never tightens, the hole has stripped. Move to Method 2.
Once all screws are tight, remove the support and swing the door. Check the latch alignment against the strike plate. In many cases you are done.
Method 2: Replacing Stripped Hinge Screws with Longer Screws
Most factory hinges ship with three-quarter-inch screws that bite only into the jamb. The jamb is usually a half-inch piece of pine or fir attached to the framing behind it. When those short screws strip out, the fix is to replace them with longer screws that reach through the jamb and into the framing.
Remove one screw from the top hinge. Replace it with a three-inch number eight or number ten wood screw of the same head style. Repeat for the other two screws in the top hinge if needed. The longer screw catches solid wood in the wall framing and anchors the hinge far more securely than the original.
Do this only on the top hinge unless the middle or bottom hinges are also stripped. Replacing all screws on all hinges with three-inch screws can pull the jamb out of square if overdone.
Test the door after each screw replacement. Often a single longer screw in the top hinge will pull the door back into alignment and end the sag.
Method 3: Shimming a Hinge to Adjust Alignment
If tightening and longer screws have not solved the problem, the issue is geometry rather than loose hardware. The hinges sit too deep in their mortises, or the jamb has bowed inward slightly. The fix is to shim one or more hinges outward so the door's swing path lines up with the strike plate.
To shim the top hinge outward, which lifts the bottom corner of the latch side, remove the screws from the door-side leaf of the top hinge. Cut a thin shim from a cereal box, a manila folder, or a thin sheet of cardboard. Place the shim between the hinge leaf and the door mortise. Reattach the hinge. The added thickness pushes the door slightly away from the jamb at the top hinge, which lifts the latch corner.
If the door catches at the bottom of the strike side, shim the bottom hinge instead. The shim moves the bottom corner outward, which lifts the top corner of the latch side.
This adjustment is fussy. Cut shims in small increments and test the door's swing after each change. Too much shim and the door will not close flat against the stop molding.
Method 4: Replacing Worn Hinges
Hinges have a service life. After many years of door cycles, the pin oval-elongates the knuckles, and even tight screws cannot hold the door in proper position. If the hinge pin slides up and down freely under the door's weight, or the knuckles show visible wear, the hinges need replacement.
Hinges come in standard residential sizes. Measure the existing hinge and bring it to the hardware store to match. Most interior doors use 3.5-inch hinges with rounded corners; exterior doors typically use 4-inch hinges. Match the finish to the other hinges in the room.
Remove the door first. With a helper supporting the door, tap out the hinge pins from bottom to top, then lift the door away. Unscrew the old hinges from both the door and the jamb. Install the new hinges in the existing mortises, hang the door, and reinstall the pins from top to bottom.
What Tools Do You Need to Fix a Sagging Door
Most sagging door repairs require only a basic tool set:
- Phillips screwdriver or cordless drill with bit set
- Three-inch wood screws (number 8 or 10, matching the existing screw head style)
- Wedge, shim, or thin block of wood to support the door during the repair
- Hammer and flathead screwdriver if hinge pins need to come out
- Pencil for marking adjustments
- Cardboard or manila folder for shim stock
For most homes you already own everything except possibly the three-inch screws. Plan on under ten dollars in materials if you need to buy anything.
How Long Does a Sagging Door Repair Take
A straight tightening of loose hinge screws takes five to ten minutes. Replacing screws with longer ones takes 15 to 20 minutes. Shimming hinges runs 30 to 45 minutes including test cycles. Replacing hinges entirely takes 45 to 90 minutes per door. Across all four methods, almost every sagging door repair fits in a single hour.
The work that takes longer than that is usually not a sag repair anymore. It is a door or jamb that has shifted enough to need carpentry, which is a different scope.
When to Repair Versus Replace
Most sagging doors are worth repairing. The cases where replacement makes more sense:
- The door is warped or bowed and no amount of hinge adjustment will pull it flat
- The door has water damage along the bottom edge that has rotted the rails or stiles
- The jamb has separated from the framing and the wall behind it needs structural repair
- The hinges have been moved multiple times and the door edge has too many old screw holes to hold a new hinge securely
- The door is hollow-core and the latch hardware has torn out of the edge
In any of those cases, the repair work to make the door function again costs roughly the same as a new door, and the new door will look and operate better. A doors and windows specialist handles both routes and can walk you through which path makes more sense for your specific door.
Can a Severely Sagging Door Be Saved or Should It Be Replaced
Most severely sagging doors can be saved. Even a door that has dropped enough to drag on the threshold is usually a candidate for the longer-screw or shim methods covered above. The exceptions are doors with structural damage to the door slab itself, doors hanging in a jamb that has pulled away from the framing, or hollow-core doors that have torn out around the hinges.
If you have tried tightening, longer screws, and shimming without success, the underlying problem is no longer the hinges. At that point the work shifts from hinge adjustment to jamb repair or door replacement, and most homeowners prefer to hand that work to a professional.
Why Homeowners Bring in Ace Handyman Services
A sagging door is usually a one-hour fix. When the cause is deeper than loose screws, the work changes character and benefits from a craftsman who has rehung dozens of doors. Here is what comes with handing the project to Ace Handyman Services.
- Peace of mind. A craftsman knows within minutes whether the door is a screw fix, a shim fix, a hinge replacement, or a jamb repair. You do not spend a Saturday cycling through methods.
- One-year labor warranty. If the door sags again after we fix it, we come back and make it right.
- The right hardware on the truck. Long screws, replacement hinges, shims, finish-matched fasteners, and rehang tools all arrive with the visit.
- Background-checked, multi-skilled craftsmen. Our team is W-2 employed, background-checked, insured, and trained across door, frame, and finish carpentry work.
- Predictable weekday timeline. Most door visits take one to two hours. We give you a firm start window and stick to it.
- Right-sized scope. If your door is a five-minute tightening job, we will tell you and price it that way. If it needs a new jamb or a new door, we will explain why before any work starts.
- Cleanup included. Old screws, shim trimmings, drywall dust, and any packaging from new hardware all leave with us.
Whether you have a single sagging door or a whole house of doors that have shifted, reach out to your local Ace Handyman Services office to scope the right approach.
Frequently Asked Questions
How do you fix a door that has dropped on its hinges?
Support the latch side of the door with a shim or wedge, then tighten every screw in the top hinge first. If the screws spin without tightening, replace them with three-inch screws that catch the framing behind the jamb. This single adjustment lifts most dropped doors back into proper alignment.
What does it mean when a door is sagging?
A sagging door has dropped on the latch side because the hinge screws are loose, the hinges are worn, or the jamb has shifted. The drop produces visible symptoms like a latch that no longer aligns with the strike plate, a door that drags on the floor, or a gap along the hinge side.
How to raise a door that is dragging on the floor?
Tighten the top hinge screws first, since the top hinge carries the most weight and loose screws there cause the most sag. If tightening alone does not raise the door, replace the top hinge's middle or top screw with a three-inch screw that anchors into the framing behind the jamb.
Can a sagging door be fixed without removing it?
Yes. Tightening loose hinge screws, replacing stripped screws with longer ones, and shimming the hinges can all be done with the door hung in place. The door only needs to come off for full hinge replacement or for repairs to the door edge itself.
How long does a door repair typically take?
Most sagging door repairs take 15 minutes to one hour. Tightening screws is the fastest. Replacing hinges with the door removed runs closer to 90 minutes per door. Repairs that extend beyond two hours usually involve jamb or framing work rather than the door itself.
Can a severely sagging door be saved or should it be replaced?
Most severely sagging doors can be saved with longer screws, shimming, or hinge replacement. Replacement makes more sense when the door slab is warped or water-damaged, the jamb has separated from the framing, or the door edge has too many old screw holes to hold new hardware.