Composite Door Repair in Liverpool

What makes a composite door different to repair?

A composite door is built from a GRP (glass-reinforced plastic) skin bonded over an insulated core, usually inside a reinforced frame. That makes it heavier and stiffer than a typical uPVC door with a separate infill panel. You cannot swap the panel on its own the way you often can on a uPVC door, so repairs focus on the parts that move: hinges, the multipoint lock, the gearbox, the cylinder, keeps, seals and any glazed cassette.

The extra weight matters. Over time it pulls on the hinges, and a door that has dropped by a couple of millimetres will start to catch on the frame at the top of the lock side or scrape the threshold. The lock still works, but the hooks and rollers hit the keeps instead of sliding into them, so you have to lift the handle hard or lean on the door to lock it. That strain is what eventually breaks gearboxes. It is the same mechanism we deal with as part of our double glazing and door repairs in Liverpool, but composite doors tend to reach that point with less warning because they are so rigid.

Common composite door problems we repair

• Door dropped or catchingHinges can usually be adjusted, or replaced if worn, to lift the door back into line so it closes cleanly and the gap around it is even again.
• Handle hard to liftOften alignment rather than a faulty lock. Moving keeps or adjusting hinges relieves the strain before the gearbox gives up.
• Handle floppy or will not liftUsually a broken gearbox spring or worn gearbox, sometimes the spring cassette in the handle itself. Our door lock repair page covers gearboxes in more depth.
• Key stiff or will not turnA worn cylinder, a cylinder fighting a misaligned lock, or a cam that is catching. We check which before swapping anything.
• Draughts and rattlesFlattened or shrunken weather seals, or keeps that no longer pull the door tight against them.
• Glazed panel misted or crackedDecorative glass cassettes in composite doors can sometimes be replaced as a unit, depending on the door maker and design.

Is it the lock or the door alignment?

A quick way to tell is to try the handle with the door open. If the hooks, rollers and bolts throw out and retract smoothly when the door is open, but the handle is stiff when it is shut, the lock is probably fine and the door has moved. If the handle is stiff, floppy or jammed even when the door is open, the gearbox or another lock component is likely at fault.

Please do not force a stiff handle. A multipoint lock is driven by one central gearbox, and leaning on the handle to drag misaligned hooks into the keeps is exactly how gearboxes snap. If the door will not lock at all, it is better to call us than to keep trying. Our double glazing problems guide has more on telling these faults apart.

How we repair a composite door

1. We ask about the door. When you call, we ask what it is doing, roughly how old it is, and whether there is a maker's name on the lock edge, cylinder or hinges. A photo of the lock edge helps us identify parts.
2. We visit and check it properly. We look at the gaps around the door, the hinges, how the hooks meet the keeps, the gearbox action and the cylinder.
3. We explain and quote. You get a written quote and a plain explanation of whether adjustment, a part swap or both is the sensible fix.
4. We carry out the repair. Adjustments and common parts can often be done at the first visit; less common gearboxes or cylinders may need ordering.
5. We test before we leave. The door should close without slamming, lock with a normal lift of the handle and turn of the key, and seal evenly.

Security: is it worth upgrading the cylinder?

Many composite doors fitted before anti-snap cylinders became common still have a basic euro cylinder. If yours is stiff or worn, it makes sense to replace it with one that meets TS 007 3-star, or a 1-star cylinder paired with a 2-star security handle, as the door & hardware federation recommends. A cylinder should also sit no more than a few millimetres proud of the handle. Our anti-snap lock upgrade page explains the ratings and what to look for on the cylinder face.

Where we repair composite doors

We work across Liverpool and Merseyside. Composite doors are common on newer estates and on homes that have had their front doors replaced in the last fifteen years or so, from the later private developments around Halewood and the newer estates in Huyton to suburban semis in Maghull. Wherever you are, the repair process is the same.

What affects the cost of a composite door repair?

The main factors are whether the job is adjustment only or needs parts, which lock and gearbox the door uses (some makes are far easier to source than others), the cylinder grade you choose, and whether a second visit is needed for ordered parts. We quote after seeing the door. Our repair cost guide gives some published national figures for gearboxes as a rough reference.