Doors that stick, bind or refuse to latch are one of the most common seasonal complaints in UK homes. The usual diagnosis is that the door has swollen, and sometimes that is correct. Just as often the door has not changed at all and something else has moved.
This guide explains what actually causes a door to bind, how to diagnose it correctly before you reach for a plane, and what genuinely works in a British climate. Doors2Floors has supplied doors and flooring to homes and businesses across the UK, and sticking doors are one of the most frequent questions we get between November and February.
An important correction. The previous version of this article recommended storm doors, storm windows, weatherstripping and door sweeps. Those are North American products and terms. Storm doors and storm windows are essentially unknown in UK housing. The British equivalents are draught proofing strips, threshold seals, brush strips and secondary glazing, and those are what this guide covers.
What actually causes a door to bind
Moisture absorption in the timber
Timber is hygroscopic. It takes up moisture from humid air and releases it in dry air, expanding and contracting across the grain as it does so. This is genuine swelling and it is the classic cause.
Why it is worse in autumn, not deep winter
Counter to the common belief, many UK doors bind worst in a damp, mild autumn rather than a cold, dry January. Once central heating runs continuously the indoor air becomes very dry and timber shrinks again.
Correcting a common misexplanation
Cold air does not "contract and leave no room for moisture". Cold air simply holds less water vapour, so when warm moist indoor air meets a cold surface such as an external door or a north facing frame, that vapour condenses. It is condensation on a cold surface, not compression of the air.
Building movement
Houses move seasonally, particularly on clay soils. A frame that is 2mm out of square in summer can be 4mm out in winter, and the door has not changed at all.
Hinge screws pulling out
The single most common cause of a door catching on the latch side. The leaf drops on the hinge side and the top corner fouls the frame.
Paint build up
Five layers of paint on the leaf edge and five on the stop is 1mm to 2mm of extra material. That alone can turn a working door into a sticking one.
Carpet, underlay and new flooring
A new floor raises the finished level. The door was fine; the floor came up to meet it. Our engineered oak flooring guide covers planning for this.
A poorly fitted door in the first place
If a door binds within weeks of installation, it was almost certainly hung with insufficient clearance rather than having swollen.
Diagnosing the problem properly
Find exactly where it catches
Close the door slowly and watch. Slide a piece of paper around the perimeter with the door closed; where it will not pass is where the contact is.
The top latch corner
Almost always dropped hinges rather than swelling. Check the hinge screws first.
The bottom latch corner
Usually a frame that has moved, or a floor that has risen.
The full length of the latch edge
This is genuine width expansion, or paint build up along the edge.
The bottom edge dragging on the floor
A flooring issue, not a door issue, unless the door has taken up water at the base.
Test whether it is seasonal
Mark the contact point with a pencil and check again in three months. If it clears in spring, it is moisture and you should not plane it.
Check the frame for square
Measure both diagonals of the opening. A difference of more than a few millimetres means the frame, not the door, is the problem.
Check the latch alignment
Sometimes the door closes perfectly and simply will not latch. That is a strike plate alignment issue and takes ten minutes to fix.
Fixes that do not involve cutting the door
Tighten or replace the hinge screws
Try longer screws that reach into the frame timber rather than just the lining. This one fix solves a large share of sticking doors.
Repair stripped screw holes
Glue hardwood dowels or matchsticks into the stripped hole, let it set, then redrill. New screws in an old hole will strip again.
Add a hinge or upgrade to a heavier pair
Heavy solid core doors need three hinges. We stock over 350 door hinges, and our hinge positioning guide covers spacing.
Deepen a hinge recess
If the door binds on the hinge side, the recess may be too shallow and the door is standing proud. Deepening it by a millimetre is often all that is needed.
Pack a hinge out
Conversely, a thin card packer behind one hinge leaf shifts the whole leaf across and can clear a catch on the latch side without touching the door.
Move the strike plate
If the issue is latching rather than closing, reposition or slightly file the strike plate. We list over 700 locks and latches.
Remove paint build up
Scraping and sanding back accumulated paint on the leaf edge and the door stop frequently restores the original clearance. Our guide to painting an interior door explains how to avoid rebuilding it.
Adjust the door stop
On a planted stop, prising it off carefully and refitting it a millimetre back is far less destructive than planing the leaf.
Controlling humidity inside the home
The target range
Aim to keep relative humidity roughly between 40 and 60 percent. Below that, timber shrinks and gaps open. Above that, timber swells and doors bind.
Measuring it
An inexpensive hygrometer tells you far more than guesswork. Put one in the hallway and one in the worst affected room.
Extractor fans
Bathrooms and kitchens generate most of the moisture in a UK home. An extractor fan that runs long enough and actually vents outside is the single most effective control.
Drying washing indoors
A single load of wet washing releases a large volume of water into the air. If you must dry indoors, do it in one room with the window open and the door shut.
Trickle vents and background ventilation
Modern windows have trickle vents for a reason. Taping them shut to stop a draught is a reliable way to create damp and swollen doors.
Dehumidifiers
Genuinely effective in a persistently damp property, particularly in autumn before the heating goes on.
Consistent heating
Sharp swings between cold and hot drive condensation. Steady background heat is better for timber than intermittent blasts.
Furniture and airflow
Keeping furniture a little off external walls allows air to circulate and reduces cold spots where moisture collects.
Sealing a timber door properly
Why sealing works
A sealed door absorbs and releases moisture much more slowly. It does not become waterproof, but it stops the rapid swings that cause seasonal binding.
All six surfaces
Four edges plus both faces. The top and bottom edges are the ones people miss, and they are usually the most absorbent because they are end grain.
The bottom edge is the priority
It sits closest to damp floors, mopping water and, on an external door, driving rain. An unsealed bottom edge is the most common entry point for moisture.
Sealing an unfinished door before it is hung
Far easier on trestles than in situ. If you are buying from our over 80 unfinished internal doors, seal every face before hanging.
Paint as a moisture barrier
A properly primed and topcoated door is well sealed. Our over 80 white primed internal doors only need finishing to be fully protected.
Oil and hardwax finishes on oak
Oils penetrate rather than film, so they slow moisture movement while letting the timber breathe. Our oak door care guide covers reapplication.
Factory finished doors
These arrive sealed on all faces and are the lowest maintenance option. We list over 350 fully finished internal doors.
Resealing after any trimming
The moment you plane an edge you expose bare timber. Seal it the same day or you have simply created a new moisture path.
Draught proofing, the UK way
What draught proofing actually does
It closes the gap between leaf and frame with a compressible strip, cutting air movement and heat loss. Our full guide to draughty doors covers fitting.
Self adhesive foam strips
Cheapest and easiest, but they compress permanently and usually need replacing every year or two.
E and P profile rubber strips
Better recovery and much longer life. Choose the profile to match your actual gap rather than guessing.
Brush pile strips
Good for uneven gaps and for sliding doors. They cope with movement better than a solid rubber seal.
Threshold and bottom seals
A brush strip or a drop down seal at the bottom of the door. This is the British answer to what North American guides call a door sweep.
Do not over seal a binding door
Adding a thick seal to a door that already sticks makes it worse. Fix the fit first, then draught proof.
Intumescent and acoustic seals on fire doors
These sit in a rebate and must never be removed, painted over or replaced with generic foam. Our over 150 FD30 fire doors come with the correct seals specified.
Letterbox and keyhole draughts
On external doors these are often the biggest single source of cold air. Our over 90 external doors and composite external doors include modern sealed designs.
Secondary glazing and windows, the British alternative to storm windows
Why storm windows are not the answer here
Storm windows are an American retrofit for single glazed sash windows in extreme continental winters. UK homes solve the same problem with double glazing or secondary glazing.
Secondary glazing
An additional internal pane fitted inside the existing window. It is the standard solution in listed buildings and conservation areas where replacement is not permitted.
Double and triple glazing
Replacing failed units reduces both heat loss and internal condensation. Our U values guide explains how the performance figures work.
Condensation on the glass
Water running down the inside of a window is a humidity signal for the whole house, and it is often the same moisture that is swelling your doors.
Curtains and blinds
Heavy curtains reduce heat loss but can trap moist air against a cold pane. Leave a gap at the bottom or open them during the day.
Window vents
Keep trickle vents open in winter. The small heat loss is far cheaper than a damp problem.
Draught proofing sash windows
Brush seals in the meeting rail and stiles transform an original sash without altering its appearance.
Porches and draught lobbies
This is the genuine UK equivalent of a storm door. A porch creates an unheated buffer zone and reduces air movement through the front door dramatically.
External doors and weather exposure
Why external doors swell more
They face rain, direct sun and the full temperature swing. Internal doors experience none of that.
South and west facing doors
These take the most driving rain in most of the UK and need the most attention to sealing.
Timber external doors
They need a full finish system maintained on a schedule. Our guide to cleaning and maintaining a wooden front door covers it.
Composite doors do not swell
A GRP skinned composite door is dimensionally stable in a way timber never will be. Our composite external doors are the practical answer for an exposed elevation. See our grey composite door guide.
Weatherbars and drip bars
A weatherbar throws water clear of the bottom edge. It is a small component that prevents a large problem.
Rain deflection and canopies
A porch canopy over an exposed front door does more for its lifespan than any coating.
Drainage around the house
Blocked gutters and overflowing downpipes soak the wall and the frame beside the door. Clearing them is free.
Ground levels and thresholds
Raised patios and gravel piled against a threshold wick water into the frame. Keep the ground level well below the damp proof course.
Ventilation and airbricks
Why blocked vents cause swollen doors
Moisture that cannot escape ends up in the timber. Vents are not optional extras.
Airbricks and suspended floors
Blocked airbricks trap damp under a suspended timber floor, which then rises into the house. Clearing them is one of the highest value maintenance jobs on an older property.
Loft ventilation
A poorly ventilated loft raises humidity throughout the upper floor. Note that in UK usage this is a loft, not an attic.
Extractor ducting
A fan venting into a loft rather than outside simply moves the moisture somewhere worse.
Cooker hoods
A recirculating hood filters grease but returns all the steam to the room. A ducted hood removes it.
Tumble dryers
Vented dryers must vent outdoors. Condenser dryers still release some warmth and moisture into the room.
Unused rooms
Closing off and never heating a spare room creates a cold, damp pocket and doors in that area suffer first.
Cellars and basements
Persistent damp below rises. Ventilation and, where necessary, professional damp investigation is the right route.
When you do have to trim the door
Wait for the season to turn first
If you plane a door in a damp October, you will have a gappy door by February. Wait unless the door genuinely cannot be used.
How much you can safely remove
Engineered and hollow core doors have narrow lippings. Removing more than the manufacturer's stated allowance exposes the core. Our comparison of hollow core versus solid core doors explains the construction.
Take it off the hinge edge or the latch edge?
Small amounts from the latch edge. Larger adjustments should be shared between both edges so the door stays symmetrical.
Never trim a fire door beyond its allowance
Every fire door states a maximum trim. Exceeding it compromises the rating. Confirm requirements with your local building control body.
The technique
Work with a sharp plane, take fine shavings, and check the fit repeatedly. Our guide on how to plane a door covers it step by step.
Seal the cut edge immediately
Bare timber is an open door for moisture. Prime or oil it the same day.
Trimming the bottom for new flooring
Measure from the finished floor including underlay, not the bare subfloor.
When trimming is the wrong answer
If the door is warped, delaminating or has been trimmed before, replacement is usually cheaper. Browse over 700 internal doors.
Choosing doors that resist movement
Engineered cores are the key
An engineered stile and rail construction moves far less than solid timber. This is why almost every quality internal door sold in the UK is engineered.
Solid timber doors
Beautiful and traditional, but they move the most. In a centrally heated house they need the most maintenance.
Oak veneered doors
Oak look with engineered stability. We list over 290 internal oak doors, including the LPD Girona Fully Finished Oak at £150.00.
Primed and painted doors
A paint film is an effective moisture barrier. The LPD Smooth Cottage White Primed at £55.99 and the LPD Shaker 4 Panel at £106.50 are popular starting points.
Laminate faced doors
Non porous facings resist moisture very well. We stock around 30 laminated internal doors.
Fire doors and moisture
Fire door cores are dense and heavy, which makes correct hinging critical. We list over 240 fire doors including FD60 doors.
Doors for bathrooms and utility rooms
Choose a fully finished or laminated door and make sure the extraction works. See our door materials guide.
Budget options that still perform
Our over 20 clearance doors and our guide to the UK's cheapest internal doors are worth a look.
Room by room, where doors bind and why
Front door and porch
The most exposed door in the house and the one most likely to genuinely swell. Sealing, a weatherbar and a canopy make the biggest difference. Browse over 90 external doors and glazed external doors.
Back door and utility entrance
Wet boots, washing machines and often the worst ventilation in the house. This door binds more than any other internal opening.
Bathroom door
Steam is the direct cause. A properly sized extractor fan run for long enough after showering solves most bathroom door problems. A frosted glazed door from our 22 options adds light without losing privacy.
Kitchen door
Cooking steam plus temperature swings. A ducted cooker hood matters more here than any door treatment. Consider over 280 glazed doors to keep light moving while containing smells.
Understairs and cupboard doors
Unheated, unventilated pockets. These doors often bind while every other door in the house is fine.
Loft hatch and eaves doors
Loft spaces swing further in humidity than the rooms below. Insulated, sealed hatches perform far better.
Garage to house door
Cold on one side, heated on the other, and frequently required to be a fire door. We stock over 150 FD30 fire doors and over 50 glazed fire doors. See what fire doors are and where they go.
Conservatory doors
The most extreme environment in a UK home for timber. Our conservatory guide explains the temperature and humidity swings involved.
Bedroom and landing doors
Usually the last to bind. If a bedroom door sticks, look for a hidden moisture source such as an en suite or a cold external wall.
Space saving alternatives
Sliding and folding doors do not bind against a frame in the same way. Consider bi-fold doors, pocket doors or sliding door kit systems, and read our bi-fold explainer.
Choosing a replacement style
If you are replacing anyway, our traditional versus modern guide, our buyers guide and our shaker doors are good starting points.
Seasonal maintenance checklist
Early autumn
Clear gutters and downpipes, check airbricks, test extractor fans and check hinge screws before the wet season starts.
Late autumn
Fit or replace draught proofing, check threshold seals, and put a hygrometer in the hallway.
Winter
Keep heating steady, keep trickle vents open, and resist the urge to plane anything.
Spring
Check whether the binding has cleared on its own. If it has, it was moisture and no cutting is needed.
Summer
The right time to plane, sand, seal and repaint, because the timber is at its driest and most stable.
Annually
Tighten every hinge screw in the house. It takes half an hour and prevents most sticking doors.
Every few years
Reseal or repaint edges, especially bottom edges. See our guide to maintaining painted doors.
When something changes
New flooring, a new bathroom, a new extension or a change of heating system all alter the moisture balance. Expect doors to react.
Related door problems
Doors that squeak
Usually dry hinges rather than swelling. See stopping doors squeaking.
Doors that slam
Air pressure and closer tension. Our notes on fire doors slamming cover it.
Loose handles
A separate problem with a simple fix. See fixing a loose door handle, and browse over 2,500 door handles and handle packs.
Doors that will not latch
Strike plate alignment, not swelling, in most cases.
Draughts under the door
A threshold seal or brush strip. Our draughty doors guide covers fitting.
Doors that swing open by themselves
The frame is out of plumb. Packing one hinge usually cures it. We stock over 30 door stops for the symptom.
Warped doors
Genuine twist rarely recovers. Replacement is normally the answer.
Frames that have moved
Sometimes the honest fix is a new lining. We list over 30 internal frames and over 15 architrave products. See our architrave guide.
Frequently asked questions
Will my swollen door return to normal after winter?
Usually yes. Genuine moisture swelling reverses as indoor air dries out. That is exactly why you should not plane it in the middle of a damp spell.
Does painting a door stop it swelling?
It slows moisture movement considerably, provided all six surfaces including the top and bottom edges are sealed. Paint on the faces alone achieves very little.
What can I do if my door will not close in winter?
Check the hinge screws first, then the frame for square, then paint build up. Only consider trimming if the door genuinely cannot be used and you have ruled out everything else.
Is it swelling or has the frame moved?
Measure the diagonals of the opening. If they differ significantly, the frame has moved and the door is innocent.
Do engineered doors swell?
Far less than solid timber, but the lippings and any exposed edges still respond to moisture.
Should I use a dehumidifier?
In a persistently damp property, yes. Aim for 40 to 60 percent relative humidity rather than the lowest possible reading.
Do I need a storm door?
No. That is a North American product. In the UK the equivalent solutions are a porch, a well sealed composite door or proper draught proofing.
Why does only one door in the house stick?
Because that door faces the wettest room, the coldest wall or the worst ventilated space. Look at what is different about its location.
Can a door swell in summer?
Yes, in a humid summer or in a bathroom with poor extraction. Swelling is about humidity, not temperature.
Is a sticking door covered by warranty?
Manufacturers generally exclude movement caused by site conditions and by failure to seal all six faces. Sealing the door properly on installation protects your position.
Getting it right
Diagnose before you cut
Planing is irreversible. Every other fix on this page is not.
Fix the cause, not the symptom
If the house is damp, a trimmed door will only bind somewhere else next year.
Seal everything you expose
Any bare timber, anywhere on the door, is a moisture path.
Keep the humidity steady
Steady beats low. Very dry air causes shrinkage, cracking and gappy joinery.
Choose stable doors when replacing
Engineered construction, fully finished, correctly hung. Our guide to choosing the right door covers the decisions.
Get the fit right on installation
Correct clearances on day one prevent most of these problems. See our measuring guide and our UK door sizes guide.
Consider replacement honestly
A door that has been trimmed twice and repainted five times has usually had its life. Browse our fully finished range or our white primed range.
Ask us
Send a photograph of where the door catches and a note of when it started. We can usually tell you whether it is the door, the hinges or the frame.
Prices and product counts quoted in this guide reflect our live listings at the time of writing and are subject to change. Persistent damp, condensation or structural movement should be assessed by a qualified surveyor or damp specialist. Fire door and building regulation requirements vary by property type and by nation within the UK, so confirm your obligations with your local building control body or a competent professional before trimming or altering a fire door.