How to Fix a Sagging Door — Hinges, Screws, and Alignment Fixes

A sagging door drags on the floor, sticks at the top corner, or will not latch because gravity and daily use loosen hinges and wallow screw holes. Most fixes need only a screwdriver and longer screws — no full door replacement. Exterior and heavy solid-core doors may need two people to support weight while you adjust hinges.

Materials and Tools

• Screwdriver (manual or drill with clutch)
• 3-inch wood screws (same head type as hinge screws — usually #9 flat head)
• Cardboard or thin wood shims for hinge leaf
• Wood glue (optional, for toothpick trick)
• Toothpicks or wooden golf tees (for stripped holes)
• Optional: plane or sandpaper block; utility knife; level

Step 1: Diagnose Where the Door Rubs

Close the door slowly and note contact points:

| Symptom | Likely cause |

|---------|--------------|

| Rubs top corner on handle side | Door sagging on hinge side — hinge screws loose or pulled |

| Rubs top on hinge side | Frame out of square or hinge set too deep |

| Rubs bottom across width | Floor uneven or door swollen from humidity |

| Latch misses strike plate | Sag or shifted frame — adjust hinges or strike |

Mark rub spots with pencil on door edge or frame.

Step 2: Tighten All Hinge Screws

1. Open door partially for access.

2. Tighten every screw in top, middle, and bottom hinges — hinge side and frame side.

3. Do not overtighten stripped holes — proceed to Step 3 if screws spin freely.

Start with the top hinge — it carries most sag load.

Step 3: Replace Short Screws With Long Ones (Best Quick Fix)

Standard hinge screws are 3/4 inch and pull out of drywall-facing trim or soft jamb.

1. Remove one screw at a time from the top hinge on the frame/jamb side.

2. Replace with 3-inch screw angled slightly toward stud behind jamb.

3. Drive until snug — pulls door and jamb upward and inward.

4. Repeat for middle hinge if sag persists; usually two long screws in top hinge suffice.

Support heavy doors while swapping screws.

Step 4: Fix Stripped Screw Holes

If screws spin without gripping:

1. Remove screw.

2. Pack hole with wood glue and toothpicks or glued golf tee sliver.

3. Let dry 30+ minutes; flush trim with knife.

4. Re-drive original or long screw.

For large holes, use 3/8-inch dowel plug glued in, then redrill pilot hole.

Step 5: Shim a Hinge Leaf (Advanced Alignment)

If door still binds at top after long screws:

1. Loosen hinge from jamb slightly.

2. Insert thin cardboard shim behind bottom hinge leaf on jamb (or top hinge on door side — experiment small amounts).

3. Retighten screws.

Shimming 1–2 millimeters changes angle noticeably. Add shims gradually.

Step 6: Adjust Strike Plate or Plane Edge (If Latch or Rub Remains)

Latch misalignment:

1. Loosen strike plate screws; move plate slightly; retighten.

2. Enlarge strike opening carefully with file if bolt hits edge.

Minor rub on door edge:

1. Mark rub line; remove door from hinges (pin tap out from bottom up with nail set).

2. Plane or sand marked area; repaint or seal exposed wood.

3. Rehang and test.

Remove minimal material — multiple light passes beat one deep cut.

Troubleshooting

| Problem | Fix |

|--------|-----|

| Door still sags after long screws | Add long screw to middle hinge; check jamb rot |

| Screw hits nothing solid | Move screw location 1/2 inch; use anchor designed for doors |

| Rub only in summer | Humidity swell — plane bottom edge slightly; improve ventilation |

| Exterior door heavy bind | Check threshold; may need professional hinge replacement |

| Hinge bent | Replace hinge pair; match size and corner radius |

| Gap at top after fix | Minor — focus on latch and smooth close |

FAQ

Why do doors sag over time?

Repeated opening stresses top hinge; short screws loosen from jamb. Heavy doors sag faster.

Can I fix a sagging door without removing it?

Yes — long screws and tightening usually work with door on hinges. Removing door is only needed for planing.

How many long screws do I need?

Often 2–3 in the top hinge into stud. Middle hinge gets one long screw if needed.

Is a sagging door a structural problem?

Usually hardware wear, not foundation. Persistent jamb rot or large gaps may need carpenter assessment.

Should I oil squeaky hinges?

Silicone spray or light machine oil on pin reduces squeak — wipe excess. Fix sag separately from noise.

The Takeaway

To fix a sagging door, identify rub points, tighten hinges, drive 3-inch screws through the top hinge into the stud, and pack stripped holes if screws spin. Shim hinges slightly for fine tuning; adjust strike plate or plane edge only if needed. Most interior doors straighten in under an hour with screws alone.