Fix a Door That Won't Close Properly

A door that won’t close properly announces itself constantly — the bedroom door that won’t latch, the bathroom door you have to hip-check, the front door that sticks every summer. Learning how to fix a door that won’t close properly starts with diagnosis, because the fix for a sagging door is completely different from the fix for a swollen one. I’ve fixed a dozen of these, and 90% took under 30 minutes once I identified the actual problem. Here’s the diagnostic flowchart.

Diagnosis: What’s Actually Wrong?

Close the door slowly and watch the gap around it (the reveal):

Gap is wider at the top on the latch side, door drags at the bottom: the door is sagging — the top hinge is pulling out. (Most common.)
Door sticks along the top or latch-side edge: the door or frame has swollen (humidity) or was always too tight.
Latch doesn’t catch the strike plate: misalignment — the latch and strike plate no longer line up (house settling, hinge wear).
Door won’t stay closed / pops open: the strike plate is misaligned or the door is binding on the frame.
Whole door rubs everywhere: possible foundation settling shifting the frame — if multiple doors suddenly stick, investigate structurally before planing anything.

Mark the rub spots with painter’s tape or lipstick/chalk on the door edge — close it, and the transfer marks show exactly where it’s binding. Precision beats guessing.

Fix 1: The Sagging Door (Tighten + Long Screw)

The classic fix, works 70% of the time:

Open the door and tighten all hinge screws — top hinge first. Often they’re just loose.
If screws spin without gripping (stripped holes), remove one top-hinge screw (the one closest to the door center) and drive a 3-inch #9 screw in its place — it bites into the framing stud behind the jamb, pulling the whole door back up. This single screw fixes most sagging doors permanently.
For badly stripped holes, pack with wooden golf tees + wood glue ($5), let dry, trim flush, re-drive the screw.

Fix 2: The Swollen/Sticking Door

Seasonal swelling (sticks in summer, fine in winter): often best left alone — but if it must close, plane or sand the binding edge. Remove the door (tap hinge pins up), mark the rub area, and shave it with a block plane ($20–$30) or belt sander. Take off less than you think — 1/16 inch at a time, test-fit, repeat.
Seal the edge: raw wood absorbs moisture and swells. After planing, paint or seal all six sides of the door (most people forget top and bottom edges — that’s where moisture enters).
Quick temporary fix: rub a candle or bar soap on the binding spot — wax lubricates enough to get through the humid season.

Fix 3: Latch Misalignment

If the latch barely misses the strike plate: file the strike plate opening slightly with a metal file ($8), or loosen the strike plate screws, shift it 1/16 inch, and retighten.
If the door has dropped (latch hits below the strike): fix the sag first (Fix 1) — the latch problem is a symptom.
Enlarge the strike mortise with a chisel if the latch needs more depth — go slowly, test frequently.

How Can I Fix a Door That Won’t Close Properly? When It’s Structural

Red flags that mean “not a DIY door fix”: multiple doors sticking simultaneously, visible cracks in walls near the door frame, the frame itself visibly out of square (check with a level), or a door that recently started sticking after years of working fine. These suggest foundation movement or framing issues — planing the door treats the symptom while the cause continues. Get a structural assessment ($300–$500) before modifying doors. But for the everyday single-door sag or seasonal stick — the long screw and the block plane handle it in under 30 minutes, and the satisfaction of a door that clicks shut properly is disproportionate to the effort.

Door Repair Mistakes to Avoid

Planing the door before diagnosing: if the problem is a sagging hinge, planing removes wood you’ll miss when the hinge is fixed. Diagnose first (watch the gap as it closes, mark rub spots) — 70% of sticking doors are hinge issues, not size issues.
Removing too much material: plane 1/16 inch at a time, test-fit, repeat. You can’t put wood back — and an over-planed door rattles in the frame forever.
Forgetting to seal planed edges: raw wood absorbs moisture and swells again — paint or seal all six sides of the door (everyone forgets top and bottom edges; that’s where moisture enters).
Ignoring sudden multi-door sticking: one sticky door = door problem. Multiple doors sticking suddenly = possible foundation movement — investigate structurally before modifying any doors.

Fixing Doors FAQs

Why won’t my door latch anymore?

Misalignment — the latch and strike plate no longer line up, usually from hinge sag (house settling, loose screws). Fix the sag first (tighten hinges, 3-inch screw into the stud) — the latch problem is usually a symptom, not the disease.

What’s the 3-inch screw trick?

Remove one top-hinge screw and drive a 3-inch #9 screw through the jamb into the framing stud behind it. It pulls the whole door back up, fixing most sagging doors permanently. The single highest-value door fix in existence.

My door sticks only in summer — what do I do?

Seasonal humidity swelling — often best left alone (it resolves in winter). If it must close: wax the binding spot (candle/soap) as a temporary fix, or plane minimally and seal all edges — unsealed planed wood just swells again next summer.

When is a sticking door a structural problem?

Red flags: multiple doors sticking simultaneously, visible wall cracks near frames, frames visibly out of square, or a door that worked fine for years then suddenly stuck. Get a structural assessment ($300–$500) before planing anything.

The Seasonal Stick: A Year in the Life

Track your sticky door for a full year before doing anything irreversible — the pattern tells you everything. Sticks in summer, fine in winter: humidity swelling — wax it and wait, or plane minimally and seal all six sides. Sticks year-round, gradually worsening: hinge sag or settling — the 3-inch screw fix. Suddenly sticks after years fine: investigate — new sticking is information (foundation, framing, moisture change). Multiple doors, same season: environmental (humidity) — whole-house humidity control (35–50%) rather than per-door surgery. The This Old House door guides are the best free reference for the diagnostic approach — their pros preach the same gospel: diagnose before you cut, because the fix for sagging is completely different from the fix for swelling, and the wrong fix makes everything worse.

How to Fix a Door That Won’t Close Properly