Stiff in the heat · hard to open · won't lock on hot days
Composite door sticking in summer?
A composite door that sticks, drags or becomes hard to lock on hot days is almost always reacting to the heat, not failing. Composite doors expand a little in the sun — dark colours most of all — and that small movement is enough to make the door rub the frame until it cools. A&E Window Doctor adjusts sticking composite doors across Clacton, Tendring and North Essex so they open and lock cleanly in any weather.
Short answer
A composite door that sticks in summer is reacting to heat, not water. The slab expands a fraction in the sun and begins to rub the frame or bind on the lock, then frees up again as it cools. Despite the word "swollen", composite doors don't soak up water like timber — they have a weatherproof skin. The fix is a simple adjustment of the hinges and keeps so the door has the right clearance in hot and cold weather alike. Don't plane or sand it.
Visible proof customers can recognise
Why composite doors stick in summer
Like any material, a composite door expands when it heats up. A south or west-facing door taking direct afternoon sun — and especially a dark grey, blue or black one that absorbs more heat — can grow just enough to catch on the frame or make the handle stiff to lift. By the cool of the evening it usually opens normally again. That day-to-night change is the giveaway that it's heat expansion rather than a broken door.
"Swollen" doesn't mean water damage
People often describe the door as "swollen", picturing a timber door that has soaked up rain. Composite doors are built differently — a solid core wrapped in a weatherproof GRP or laminate skin — so they don't absorb water and swell the way wood does. In almost every summer call-out, the real cause is thermal expansion plus a door that was set with very little clearance, which the heat then uses up.
Can a sticking composite door be fixed?
Yes — and usually quickly. Composite doors run on adjustable hinges, so an engineer can fine-tune the hinges and keeps to give the door the small extra clearance it needs without leaving it rattly in winter. It is a classic repair-first job: a short adjustment restores everyday use and the door's seal and locking, with no need to replace anything. The one thing to avoid is shaving the door yourself.
Typical A&E guide prices
| Job | Typical A&E guide price | When it applies |
|---|---|---|
| Seasonal hinge & keep adjustment | From £75 (usually a single repair call-out) | The door binds in the heat but the parts are sound. |
| Hinge replacement | From £65, quoted with the adjustment | Hinges are worn as well as needing adjustment. |
| Lock / keep adjustment or repair | Often included; mechanism quoted on inspection | The door also won't lock cleanly on hot days. |
These are typical A&E guide prices, not fixed quotes. A summer adjustment varies with the door, the hinges fitted and whether the lock is involved, so your exact quote is free after inspection. Over-60s receive a discount on all repairs.
What to do when it sticks
- 1. Don't force or barge it
Shouldering a tight door or wrenching the handle can damage the slab, hinges or lock. Work it gently.
- 2. Find where it catches
Run a slip of paper around the gap to find the tight spot — usually the top or lock-side edge.
- 3. Try it once it has cooled
If it frees up in the cool of the day, that confirms heat expansion and an adjustment job.
- 4. Don't shave or sand it
Planing can void the guarantee and leave the door loose in winter. Book a hinge-and-keep adjustment instead.
Related repair pages
FAQs
- Why is my composite door sticking in summer?
Composite doors expand a little in hot weather — dark doors in direct sun most of all — enough to rub the frame or stiffen the lock until they cool. It's a heat-and-alignment issue, not a damaged door.
- Has it swollen with water like a wooden door?
Very rarely. Composite doors have a weatherproof skin and don't soak up water and swell like timber. It's almost always thermal expansion, which eases as the door cools.
- Should I plane or sand it?
No — it can void the guarantee and leave the door loose in winter. The correct fix is to adjust the hinges and keeps for year-round clearance.
- How much does it cost?
A seasonal adjustment is usually a single repair call-out, priced on inspection. Worn hinges or lock work are quoted with it. Every quote is free, with an over-60s discount.
- Will my composite door free up on its own when it cools?
Often it does — thermal expansion eases as temperatures drop, so a door that binds on hot afternoons can feel fine by evening. The permanent fix is a small hinge and keep adjustment so it clears the frame all year, not just in cooler weather.
- Is a sticking door covered by my guarantee?
Seasonal sticking is usually an adjustment issue rather than a manufacturing fault, so it often isn't a warranty claim. A&E can carry out the adjustment quickly and affordably without you having to chase the original installer.
- Do you adjust sticking composite doors across Tendring?
Yes — A&E covers Clacton, Holland-on-Sea, Frinton, Walton, Harwich, Manningtree and the wider Tendring and North Essex area from a Holland Road showroom. Call 01255 763 942 to book a summer door adjustment.
Get a free, no-obligation quote
Tell us what's wrong and the team will come straight back with the next step — no call-out charge, over-60s discount. For urgent boarding-up, call the office direct.
Door sticking in the heat? We'll adjust it.
Tell us where the door catches and your location. If it won't lock and the property is insecure, call the office now — door adjustments across Clacton, Tendring and North Essex.