We restore existing doors and windows to correct working order – uPVC, composite, aluminium, bifold, sliding and casement systems. The goal is repair and precise adjustment, not unnecessary replacement.
- Doors or windows that don’t close, don’t lock, or scrape the frame
- Dropped composite and uPVC doors, twisted frames, stiff mechanisms
- Bifold and sliding doors that no longer run smoothly on their rollers
- Windows with failed gearboxes, hinges or jammed handles
A clear photo of the door or window (hinges and lock edge) helps us identify the system and estimate the repair before visiting.
Door Repair & Realignment
We repair composite, uPVC, bifold, sliding, patio, wooden and fire doors. Most faulty doors can be restored by correcting geometry and replacing worn components rather than fitting a new door set.
Composite & uPVC Entrance Doors
Over time the door leaf drops: the top corner rubs, the bottom catches the threshold, seals wear through, and hooks or rollers stop lining up with their keeps. The gearbox runs under constant load until it cracks or fails.
Our typical repair includes hinge realignment or replacement, fitting a new gearbox or full locking strip where required, setting correct compression, and replacing handles or cylinders if worn.
Important: cracked or fatigued uPVC hinges can let the door drop or detach. A sagging door should be corrected early – it is safer and much cheaper than waiting for hinge failure.
Bifold, Sliding & Patio Doors
Bifold and sliding systems put a lot of weight on small precision rollers and pivots. A single panel can weigh 40–60 kg, so each roller set often carries close to 100 kg. Alignment is done in millimetres, not centimetres.
We replace worn rollers, service tracks, realign panels and frames, replace damaged seals, set shootbolts, and verify smooth, level travel along the full opening.
DIY adjustment is strongly discouraged: over-tightening or using the wrong tool can strip bolts or carriers. That turns a simple setup into a full roller/hinge replacement.
Window Repair & Adjustment
We repair tilt-and-turn and standard casement windows in uPVC and aluminium – without replacing frames. Most problems come from worn gearboxes, corroded mechanisms or tired friction hinges.
Diagnostics & Typical Faults
- Handle turns but nothing happens – gearbox or corner drive failure
- Window will not close fully; visible gap between sash and frame
- Jammed tilt position or sash stuck open in bathrooms or kitchens
- Loose/spinning handles, rusted locking points, stiff operation
Service Actions
- Replacement of espagnolette mechanisms and gearboxes
- New friction hinges with correct stack height and length
- Realignment and compression adjustment on keeps and cams
- Replacement of misted or cracked double-glazed units
Upper-floor windows are repaired using proper support tools and safe methods. A detached sash can fall and cause serious damage or injury – we do not recommend DIY hinge or mechanism replacement.
Tilt-and-Turn Systems
We service tilt-and-turn windows and balcony doors – the type that tilts in at the top for ventilation, then fully swings inward when the handle is turned further.
Typical faults:
- Broken corner drives or gearbox failure
- Handles that no longer engage internal movement
- Sash stuck in tilt position and will not close
- Misaligned cams, poor sealing and draughts
All parts can be replaced without changing the frame. We stock compatible drives and gearboxes for Siegenia, Roto, Maco, GU, Winkhaus and other common systems.
Why Precision Matters
A typical aluminium bifold panel weighs around 40–50 kg; a uPVC panel of similar size can be 55–60 kg. These loads sit on small roller assemblies the size of a coin. Even a 1–2 mm height error can make the door scrape, twist the frame, or overload the locking mechanism.
All our bifold and sliding adjustments are carried out with millimetre-accurate tools, under load, and then checked for free running, correct gaps and consistent compression on seals.
Locksmith Services – Safety & Trust
Locksmith work is a trust-based service. When we work with your locks and keys, we treat it as work on your safety, not just hardware. Every job is done by a qualified, fully insured locksmith with daily experience in door and window mechanisms.
We regularly assist local Police, Fire Service, Ambulance teams and NHS facilities when doors must be opened quickly and then secured. The same level of professionalism applies to every domestic and commercial call-out.
What We Do
- Replace failed locks and cylinders (euro, mortice, sashlocks, night latches)
- Open and make safe jammed or seized doors and windows
- Secure lock changes after moving in or losing keys
- Repairs after break-ins – mechanisms and keeps restored or replaced
- Security upgrades to BS 3621 and TS007 insurance standards
Fresh Installations – Timber Doors
- Cutting-in new mortice deadlocks and sashlocks
- Fitting night latches (Yale-type) with correct backset and cylinders
- Internal privacy locks for bathrooms and WCs
- Reinforced keeps, strike plates and door chains where needed
We only use genuine, brand-new locks and original keys from approved manufacturers. High-security cylinders and mortice locks can be supplied with extended manufacturer warranties up to 10 years.
Emergency – When It Will Not Close
Our emergency work focuses on situations where doors or windows will not close or lock safely – rather than simple lockouts with lost keys.
- Front door will not lock at night
- Mechanism stuck halfway – handle moves but nothing engages
- Bifold or sliding door jammed open because rollers have failed
- Window that will not shut before leaving home or going to sleep
First step is always to make the property secure and functional. Afterwards we can discuss long-term repair, upgrades or preventative work if needed.
Fire Doors & Tor-Stoppers
Fire-rated doors require correct closer force, gap tolerances and intact intumescent and smoke seals. We repair and replace closers, seals, drop thresholds and fire-rated locks to meet FD30/BS expectations.
We also install and maintain electromagnetic door-hold devices (tor-stoppers) that keep fire doors open during normal use, but automatically release them when the fire alarm activates so the closer can shut the door fully.
Systems & Hardware We Work With
Correct repair starts with identifying the exact system and hardware. Below are typical bifold, sliding and locking brands we see in UK properties.
Bifold & Sliding Systems (Origin, Reynaers, Schüco, Smart, AluK, etc.)
We regularly repair and adjust bifold doors from Origin, Reynaers, Schüco, Smart Systems (Visofold range), AluK, Eurocell, Liniar, Cortizo and Senior Architectural Systems. Many of these require original or pattern-matched rollers, hinges and seals sourced directly from manufacturers or specialist distributors.
Door & Window Hardware Manufacturers
Locking gear, hinges and cylinders are often produced by specialists such as Siegenia, GU (Gretsch-Unitas), Winkhaus, Roto, Maco, Mila, Hoppe, Fullex, Avantis, Ingenious, Fab & Fix, KFV, ASEC, BKS and others. We identify the correct brand and model before ordering parts – a few millimetres difference in gearbox size or hook spacing is enough to stop a mechanism from operating correctly.
High-security and insurance-grade locks frequently come from ERA, Yale, EVVA, Lockmaster and ASSA ABLOY (the group behind Union, Abloy, Mul-T-Lock, Chubb and others). Where required, we specify cylinders with anti-snap, anti-drill and anti-pick protection to TS007 standards.
About GoodLock
GoodLock is a Nottingham-based door and window repair company specialising in restoring existing installations instead of replacing them. We typically complete 2–3 repair jobs each day and handle over a thousand service visits per year.
My name is Dave. I am a door and window specialist and locksmith with over ten years of hands-on experience. I work daily with uPVC, composite, aluminium and timber systems – diagnosing faults, adjusting geometry, replacing worn hardware and upgrading security where needed.
I also train other locksmiths who want to learn how to correctly adjust and repair bifold and sliding doors, seized mechanisms and failed hinges. The work is detailed and technical, but the result is simple: the door or window closes, locks and runs as it should.
If a door or window is not working, there is always a mechanical reason. Our job is to find it, correct it, and test under real load – not to sell a new product when a proper repair is possible.
Contact & Service Area
Service area: Nottingham and approximately 25 miles around the city, covering surrounding towns and villages.
Best way to reach us is by phone, SMS or WhatsApp. A photo of the problem (showing hinges, lock edge and overall door/window) helps with quick diagnosis.
- Phone / SMS / WhatsApp: 07498 596 997
Standard 12-month guarantee on all repair work and fitted parts. Emergency attendance available when a door or window will not close or lock safely.