By the FaultToFix team | Published: 28 October 2026 | Last updated: 28 October 2026
Short answer: Most door faults are small and seasonal — a hinge screw working loose, a latch missing its strike plate by a millimetre, or a door swelling slightly in damp weather. Most wall cracks are small too, but cracks are the one symptom on this page where the pattern decides whether the answer is “fill and watch” or “call a professional before you touch it”. Width, growth, shape, and whether doors and windows nearby are sticking at the same time are the signs that separate the two. Find your symptom in the table below, run the free check that confirms it, and never guess at a crack’s cause.
Who this page is for: Homeowners and renters in the US and UK with a door that sticks, swings, rattles, or will not latch, a draught under or around a door, or a crack in a wall they are unsure about · DIY level: Diagnosis is easy and free; the door fixes in these guides are beginner-level with a screwdriver — each guide will mark where that stops being true · Cost: Every diagnosis on this page costs £0 / $0; the door adjustments are typically £0–£10 in screws or draught strip
Safety box — read this before any doors-and-walls guide on this site: Never modify a fire door — no planing, no trimming, no removing closers or seals; a fire door that has been altered may not protect anyone, and fire-door work is for a competent professional. Never force a stuck door with your shoulder or foot: a door that suddenly gives can throw you off balance or break its hinges. Do not remove, cut, or chase into anything that could be load-bearing, and do not dig into a crack to “see how deep it goes”. Lock mechanisms are locksmith territory — if a lock is jammed, broken, or the key will not turn, do not dismantle it yourself. If a crack is wide, growing, stepped, or appears together with sticking doors and windows, stop — that is a professional assessment, not a DIY job. Renters should report structural-looking cracks to their landlord in writing rather than filling them.
How diagnosis works on this page
Door advice online usually starts with the most drastic fix — “plane the door” — when the real fault is often a single loose hinge screw that takes two minutes. And crack advice online usually does the opposite, waving every crack away as “just settlement” without asking whether it is growing. Both mistakes come from skipping the same step: looking at the pattern first.
Every guide in this cluster will follow the same order:
- Name the symptom exactly. Where does the door stick — top, bottom, latch side, hinge side? When did the crack appear, and is it changing? What else changed at the same time?
- Run the confirming test. The hinge-screw check, the latch-mark test, the even-gap check, or the crack-monitoring marks below. Free, minutes, and the result decides the fix.
- Fix in order. Tighten and align before trimming or replacing for doors; monitor and describe before filling for cracks — cheapest and most reversible first, with the “if that didn’t fix it” cause already written into the same guide.
Symptom → likely cause: the doors-and-walls overview table
| What you notice | Most likely cause | Where to start |
|---|---|---|
| Door sticks at the top or bottom, worse in damp weather | Seasonal swelling or a hinge working loose — the door’s gap has closed up | Guide: Sticking doors — hinge check before any trimming |
| Door sticks on the latch side and will not close cleanly | Latch and strike plate out of alignment — often after a hinge drops slightly | Guide: Door hinges and latches — alignment test |
| Door swings open or shut by itself | Hinges out of plumb — the door is not hanging level | Guide: Door hinges and latches — hinge check |
| Door rattles in its frame or feels loose when closed | Worn hinge screws or a loose strike plate | Guide: Door hinges and latches — screw check |
| Squeaking or creaking hinges | Dry or worn hinge pins — usually a lubrication job | Guide: Door hinges and latches — lubrication step |
| Cold air under or around a door | Gap at the threshold or worn draught strip — not the door itself | Guide: Draughty doors — gap check |
| Thin hairline crack in plaster, stable for months | Plaster shrinkage or minor seasonal movement — monitor, do not panic | Guide: Cracks in walls — monitoring method |
| Crack that is widening, stepped, or diagonal near a door or window opening | Needs a professional assessment — do not fill and forget it | See “When doors and walls are NOT a DIY job” below |
| Crack appearing together with doors or windows sticking | Movement affecting more than one opening — professional assessment | See “When doors and walls are NOT a DIY job” below |
| Damp patch on a wall, paint bubbling, or plaster soft to the touch | Moisture source behind the wall — not a crack problem at all | Professional — a damp source needs finding first |
Two honest notes on the table. First, doors and walls share symptoms but not causes: a sticking door plus a new crack is a different story from either one alone, and the combination is what makes a professional visit the right first step rather than the last resort. Second, this pillar deliberately does not diagnose why a wall has cracked — no guide on this site will tell you a crack is “just settlement”, because that judgement needs eyes on the building. The cracks guide teaches you to describe and monitor a crack accurately, so a professional gets useful evidence instead of a vague worry.
Guides in this cluster
All four guides in this cluster are live — start with the symptom that matches yours.
Door Keeps Sticking? Check the Hinge Screws Before You Trim Anything
Start here if: a door catches, rubs, or will not close cleanly, especially in damp weather. The guide will work the honest order: hinge screws first (a loose top hinge drops the whole door), then the even-gap check around the frame, then seasonal swelling — and only then, as a last resort, careful trimming, with the fire-door warning front and centre. Most sticking doors never need the trimming step.
Door Won’t Latch, Swings by Itself, or Rattles? The Hinge and Latch Alignment Guide
Start here if: a door swings by itself, rattles in its frame, squeaks, or its latch misses the strike plate. The guide will cover the screw check (including what to do when a screw spins without gripping), the latch-mark test that shows exactly where the bolt lands, hinge lubrication, and the point where a worn hinge or a broken latch mechanism means replacement parts or a locksmith rather than adjustment.
Crack in Your Wall? How to Monitor It — and the Signs That Mean Call a Professional
Start here if: you have found a crack and want to know whether to watch it or worry about it. The guide will teach the monitoring method — pencil marks and dates at both ends, photographs from the same spot, and a simple width check — plus the signs that mean “professional now” (growth, width, stepped or diagonal shape, doors and windows sticking at the same time). It will not diagnose the cause of any crack, and it will not tell you to fill a crack that is still moving.
Cold Air Coming Under Your Door? Find the Gap Before You Buy Any Draught Strip
Start here if: cold air comes under or around a door, especially an external door. The guide will start with the gap check — where exactly the air gets in — then the right draught strip for that gap (brush, foam, or blade, matched to the door type), threshold gaps, and the letterbox and keyhole draughts people forget. Adjustment comes before sealing: a door that does not close square will defeat any strip you fit.
The free checks that decide most door faults
The hinge-screw check (doors, 2 minutes). Open the door and try each visible hinge screw with a screwdriver. A screw that turns freely without gripping has stripped its hole — that hinge is not holding the door’s weight, and the door will sag and stick no matter how much you adjust elsewhere. A full hinge of tight screws rules the hinge out and points you at swelling or alignment instead.
The latch-mark test (doors, 2 minutes). Put a small dab of lipstick, chalk, or toothpaste on the end of the latch bolt, close the door gently, and open it again. The mark on the strike plate shows exactly where the bolt lands — high, low, or dead centre. A mark that misses the strike plate hole explains a door that will not latch, and it tells you which way the door has dropped, without any guessing.
The even-gap check (doors, 1 minute). With the door closed, look at the gap between the door and the frame all the way round — top, latch side, bottom, hinge side. The gap should be roughly even. A gap that is wide at the top on the latch side and tight at the bottom means the door has dropped on its hinges; a gap that is tight all down one side points at swelling or a frame problem. One look, and the fix narrows itself down.
The crack-monitoring marks (walls, 5 minutes). If a crack looks small and stable, mark both ends with a pencil line and the date, take a photograph from the same spot with something for scale (a coin works), and check the marks once a month. If the crack grows past a mark, widens, or new cracks appear nearby, stop monitoring and get a professional assessment — and the dated photographs are exactly the evidence they will want to see.
The hand test (draughty doors, 1 minute). On a windy day, run the back of your hand slowly around the closed door — top, sides, and especially the threshold at the bottom. The back of the hand is more sensitive to moving air than the palm. Where you feel it is where the strip or threshold work goes; sealing the whole door when only the bottom leaks is wasted money and a door that drags.
Common mistakes
- Planing a door before checking the hinges. Trimming is irreversible; a loose hinge screw is a two-minute fix. Always check the screws and the gap first.
- Over-tightening hinge screws into stripped holes. A screw that spins without gripping is not fixed by more force — it needs a proper repair (longer screw, filled and re-drilled hole, or a professional), not a harder turn.
- Filling a crack that is still moving. Filler in a growing crack just cracks again, and it hides the evidence a professional needs. Monitor first, fill only once a crack has proven stable — and never fill a wide, stepped, or growing crack without advice.
- Sealing a draughty door that does not close square. Draught strip on a dropped door gets crushed on one side and gaps on the other. Align first, seal second.
- Painting over damp or mould on a wall and calling it fixed. The moisture source is still there, and the paint just hides it for a few weeks. Find the source first.
- Forcing a stuck door. A door that suddenly gives can break hinges, split the frame, or throw you off balance. Find the sticking point with the gap check instead.
When doors and walls are NOT a DIY job
Diagnosis is nearly always safe; some situations are not a learning opportunity. Stop and call a professional if:
- A crack is wide, growing, stepped, or diagonal near a door or window opening — or if cracks appear together with doors and windows sticking. That combination needs a professional assessment (a surveyor or structural engineer) before anyone fills or covers anything.
- The door is a fire door. No planing, trimming, closer removal, or seal changes — fire-door work is for a competent professional, and an altered fire door may not protect anyone.
- A lock is jammed, broken, or the key will not turn. Lock mechanisms are locksmith territory; dismantling one yourself can leave the door unsecured.
- A wall is damp, soft, or bulging, or water is tracking in from outside. A moisture source behind a wall needs finding and fixing first — filling or painting over it makes it worse, not better.
- You are a renter and the fault is structural-looking, a fire door, or a lock. Note the diagnosis (it makes the landlord’s tradesperson faster), then report it in writing rather than trying to fix it yourself.
US / UK term box
| US term | UK term used in these guides |
|---|---|
| Baseboard | Skirting board |
| Door casing / trim | Architrave |
| Strike plate | Strike plate / keep |
| Weatherstrip / weatherstripping | Draught strip / draught excluder |
| Drywall | Plasterboard |
| Spackle / joint compound | Filler |
| Door sweep | Threshold brush / door brush strip |
| Deadbolt | Mortice deadlock / rim lock (by type) |
| Stud wall | Stud partition wall |
FAQs
My door sticks every winter and frees up in summer. Do I need a new door?
Almost certainly not — that seasonal pattern is the classic sign of swelling in damp weather, often combined with a hinge that has worked slightly loose. Check the hinge screws and the even gap first: most seasonal stickers are fixed by tightening a hinge or waiting out the damp season, and trimming a door that swells every winter just leaves it rattling every summer.
The latch misses the strike plate. Is the door the problem or the frame?
Usually neither in the way people assume — it is the door dropping slightly on its hinges, which moves the latch down with it. The latch-mark test shows exactly where the bolt lands, and a hinge-screw check usually finds the cause. Realigning the door (or, as a small fix, moving the strike plate a millimetre) beats replacing the latch.
I found a hairline crack in the plaster. Should I worry?
A thin, stable hairline crack in plaster is common and usually cosmetic — but “stable” is the word doing the work, and you only know it is stable by monitoring it. Mark both ends with a pencil and the date, photograph it, and check monthly. If it grows, widens, steps, or appears with sticking doors, stop and get a professional assessment instead of filling it.
Can I fill a crack myself?
Only once it has proven stable through monitoring, and only a small plaster crack — filler, sanded smooth, and painted over. Never fill a wide, stepped, diagonal, or growing crack, and never fill a crack in a wall that is damp or bulging. Those need a professional look first, and filler would only hide the evidence.
Cold air pours under my front door. What is the fastest fix?
Check the threshold gap first with the hand test — if the air comes from underneath, a threshold brush strip or door sweep is the usual answer, and it is a ten-minute job. But if the door itself does not close square, align it first: a strip on a dropped door gets crushed on one side and leaves a gap on the other.
FaultToFix doors-and-walls guides are written symptom-first: diagnosis before fix, cheapest check first, and a clear line where DIY stops. Browse the cluster archive in the Doors & Walls archive. All four guides are live in this cluster.
Last updated: 28 October 2026