How to Fix a Sticking Door: A Complete Step-by-Step Guide

Quick answer: Slide a sheet of paper between the door and frame to find exactly where it sticks. If it’s a hinge issue, tighten the screws first, replacing any stripped ones with longer screws. If the door still catches, lightly sand the sticking area. Never plane a fire door, hollow-core door, or uPVC door without checking building regulations or the manufacturer’s guidance first, since removing material can compromise their safety rating.

A sticking door is one of the most common complaints in UK homes, especially in older properties or during the wetter months. In our humid climate, wooden doors absorb moisture from the air and swell just enough to jam in their frame. The good news is that most sticking doors are a straightforward, low-cost fix, provided you find the actual cause before reaching for a plane.

Why Doors Stick in the UK

The UK’s damp, humid climate is usually the main culprit. Wooden doors behave a bit like sponges, absorbing moisture from the air, which causes the wood fibres to swell. This is often just enough to make a previously fine door jam tightly in its frame, and it tends to appear or worsen during wetter seasons. Beyond humidity, loose hinges, a misaligned frame, paint build-up, or a change in flooring, such as a new carpet reducing the clearance underneath, are the other common causes.

Step 1: Find Exactly Where It Sticks

Rushing in and sanding the wrong spot can make things worse, so take a moment to diagnose properly first.

1. Close the door slowly and watch closely for where it first makes contact with the frame.
2. Look for scuffed paint or worn patches on the door edge and frame, which are tell-tale signs of where it catches.
3. An old trick that works well: slide a sheet of paper between the door and the frame while it’s closed. If the paper gets stuck or tears in a particular spot, that’s your sticking point.
4. Mark the exact spot with a pencil so you know precisely where to focus your fix.

Step 2: Check and Tighten the Hinges

Loose hinges are the most frequent cause of a sagging, sticking door, and this is the simplest thing to rule out first.

1. Use a screwdriver to tighten all the screws on both leaves of every hinge.
2. Use a manual hand screwdriver rather than a power drill where possible, since a drill can strip the screw holes and make the problem worse.
3. If a screw hole is stripped, remove the screw and insert a wooden toothpick or matchstick with a little wood glue into the hole before reinserting the screw, giving it fresh material to bite into. Alternatively, replace with a longer screw that reaches solid timber.
4. Use a level to check the door hangs straight in the frame. If it’s misaligned, loosen the relevant hinge screws slightly and reposition before retightening.

Step 3: Adjust Hinges for Minor Misalignment

If the door sticks at the top on one side, raising the hinge on the opposite side very slightly can correct the angle without needing to sand or plane anything. This is a precise fix worth trying before reaching for more invasive methods.

Step 4: Sand the Sticking Area

If tightening and adjusting hinges hasn’t solved it and the door is genuinely too tight against the frame, sanding is usually the next step.

1. Using the marks from your earlier diagnosis, sand the sticking area gently with sandpaper or an electric sander.
2. Work in small amounts, checking the fit by closing the door periodically rather than removing too much material in one go.
3. Once the door closes freely, seal any bare wood you’ve exposed with paint or varnish to match the rest of the door.

Step 5: Plane the Door (Last Resort)

Planing removes more material than sanding and should be treated as a last resort for more significant sticking. Before you plane anything, check the important safety exceptions below.

1. Remove the door from its hinges to work on it more easily and precisely.
2. Mark the area to be trimmed with a pencil or utility knife.
3. Use a wood plane, working with the wood grain, to shave off thin layers from the sticking area.
4. Rehang the door and test frequently, removing only a small amount at a time.

Important: When You Should NOT Plane a Door

This is the step many general guides skip, and it matters. Certain door types should never simply be planed without proper guidance:

• Fire doors must maintain certified dimensions and clearances by law. Removing material can invalidate the fire rating unless done under approved methods and guidance.
• Hollow core doors have a thin outer skin, often around 20mm, with limited solid timber at the edges. Excessive planing can expose the hollow core and structurally weaken the door.
• uPVC internal doors are not designed to be planed at all. These usually need adjustment at the hinges or replacement parts instead.
• Severely distorted frames, out of square by more than a few millimetres, won’t be solved by planing the door. This points to a structural issue with the frame itself that planing will not fix.

Fixing a Sticking Latch

Sometimes the door itself is fine, and the problem is at the latch instead.

1. Loosen the screws holding the strike plate on the frame.
2. Reposition it slightly to better align with the latch.
3. Retighten the screws and test the door.
4. If the latch still doesn’t seat properly, use a small file to slightly enlarge the hole in the strike plate.

Dealing With a Sticking Bottom Edge

If a door drags along the floor, particularly after new flooring or carpet has been fitted, you have two main options. Adding a shim under the hinges can raise the door slightly, or, if that isn’t practical, trimming a small portion from the bottom edge works, provided the door isn’t a fire door or hollow core door as covered above. Confirm the floor height is stable before trimming, since further flooring changes could mean cutting the door again later.

Prevention for the Future

• If humidity is the main cause and it’s a recurring seasonal issue, using a dehumidifier in the affected room during wetter months can reduce swelling.
• Check hinge screws periodically as routine maintenance, tightening any that have worked loose.
• Keep doors and frames painted and sealed, since bare wood absorbs moisture more readily than a properly finished surface.

Related Guides

• How to Remove a Stripped Screw
• How to Draught Proof a Door

Frequently Asked Questions

Why does my door only stick in certain seasons?

This points to humidity as the cause. Wooden doors absorb moisture from damp air and swell slightly, which is often just enough to cause sticking during wetter months, easing again once the air dries out.

Can you plane a fire door or hollow core door?

Not without caution. Fire doors have certified dimensions that planing can compromise, and hollow core doors have limited solid timber at the edges that can be exposed if too much material is removed. Both need specialist guidance rather than a standard planing approach.

How do you know if a door is sticking at the hinge or the latch?

Watch where the door makes contact as you close it slowly. Sticking near the hinge side usually points to loose or misaligned hinges, while resistance specifically at the latch when it’s almost closed points to a strike plate alignment issue.

Is it better to sand or plane a sticking door?

Sanding is the gentler option and should be tried first, since it removes far less material. Planing removes more and is better reserved for more significant sticking, treated as a last resort after checking hinges and trying sanding.

Final Thoughts

Most sticking doors come down to loose hinges or seasonal swelling from humidity, both of which are simple, low-cost fixes. Diagnose exactly where the door catches before touching a sander or plane, and always check whether you’re dealing with a fire door, hollow core door, or uPVC door before removing any material.