Welcome to our locksmith information hub, where we share real projects, expert security advice and practical guidance on locks, doors and home protection. From completed jobs across West Dunbartonshire to tips on improving your property’s security, these articles are designed to help you understand your options and make confident decisions about keeping your home safe.
Published Date: 28 June 2026
A.L.S. Locksmiths is dedicated exclusively to homeowner locksmith services, specialising in the repair, maintenance and security of residential doors. By focusing on uPVC, composite, French, conservatory and timber doors, we provide expert diagnosis, quality repairs and honest advice. Our repair-before-replacement philosophy helps homeowners save money by repairing locks, gearboxes and multipoint mechanisms wherever possible, while improving the security and lifespan of existing doors.
Published Date: 28 June 2026
Composite doors provide excellent security when combined with a quality multipoint locking system, high-security euro cylinder and proper door alignment. Understanding how each component works, recognising early signs of wear and carrying out simple maintenance helps keep the locking system reliable and your home protected. Most locking faults can be repaired by replacing worn components rather than replacing the entire door, making repairs a practical and cost-effective solution.
Published Date: 28 June 2026
If you're considering replacing your flat entrance door in Scotland, it's important to understand the cost implications and the current fire safety requirements. A new compliant fire door can cost from around £2,000, but many existing doors don't need replacing. Whether the issue is a faulty lock, worn mechanism or non-compliant fire door components, repairing or upgrading the existing door may be a far more affordable solution. A professional assessment can determine whether you can safely keep your existing door and avoid an unnecessary replacement.
Published Date: 28 June 2026
Understanding your home's door locks is essential for maintaining security and preventing unnecessary repairs. From euro cylinders and multipoint locking mechanisms to security upgrades and routine maintenance, each component plays a role in keeping your property safe. Most locking problems can be resolved by replacing worn parts and correctly realigning the door, making repair a practical and cost-effective alternative to replacing the entire door.
Published Date: 28 June 2026
Door alignment plays a vital role in the performance and lifespan of a multipoint locking system. When a uPVC, composite or French door moves out of alignment, extra strain is placed on the gearbox, locking points, handles and euro cylinder, often leading to stiff operation and premature failure. Recognising the early signs of poor alignment and correcting them promptly helps extend the life of the locking mechanism, improve security and avoid unnecessary door replacement.
Published Date: 28 June 2026
Multipoint locking systems secure uPVC, composite and French doors at several points, providing greater security and weather resistance than traditional locks. The system includes a euro cylinder, centre case (gearbox), hooks, rollers and deadbolts, all of which rely on correct door alignment to operate smoothly. Most locking problems are caused by wear or poor alignment rather than the door itself, and can usually be repaired by replacing the worn components instead of installing a new door.
Published Date: 28 June 2026
Most uPVC, composite and French door problems don't require a new door. Faults such as failed gearboxes, worn multipoint locking mechanisms, damaged handles and poor door alignment can usually be repaired by replacing the affected components. Unless the door or frame has suffered significant structural damage, repairing the existing door is often a more cost-effective and long-lasting solution than complete replacement.
Published Date: 28 June 2026
Dust, grit and debris can build up inside a door's euro cylinder and around the moving parts of a multipoint locking mechanism, increasing friction and accelerating wear. While dirt alone rarely causes complete lock failure, it can make existing problems worse and shorten the lifespan of the locking system. Regular cleaning, using the correct lock lubricant and maintaining proper door alignment help keep locks operating smoothly and reliably.
Published Date: 28 June 2026
The centre case houses the gearbox and is the most important part of a multipoint locking mechanism. It connects the handles, euro cylinder and locking points, allowing the entire lock to operate. Because it carries the greatest mechanical load, it is also the component most likely to wear, particularly if the door is out of alignment. Replacing a worn centre case and realigning the door can restore smooth operation and significantly extend the life of the locking system.
Published Date: 27 June 2026
A broken door handle is frequently a symptom of a door that's dropped out of alignment. As the locking points begin to catch on the frame, extra force is needed to lift the handle, placing excessive strain on the handle, gearbox and multipoint locking mechanism. Simply replacing the handle won't solve the underlying problem. Correctly realigning the door and checking the entire locking system provides a more reliable, long-lasting repair.
Published Date: 27 June 2026
The lock and the mechanism are two separate parts of a door's locking system. The lock, or euro cylinder, is the key-operated component, while the mechanism is the multipoint locking system inside the edge of the door that operates the hooks, rollers and deadbolts. Understanding the difference helps identify whether the problem is a worn cylinder, a failed gearbox or a damaged multipoint mechanism, allowing the correct repair to be carried out without replacing unnecessary parts.
Published Date: 27 June 2026
Repair door mechanism kits for uPVC and composite doors can be useful in some situations, but they often fail to address the underlying cause of the problem. Generic kits may not match the original mechanism, replace only part of the worn system, or overlook poor door alignment that caused the failure in the first place. A proper diagnosis, quality replacement parts and correct door realignment usually provide a far more reliable and longer-lasting repair.
Published Date: 27 June 2026
A door that locks from the inside but not from the outside is commonly caused by a worn euro cylinder, a failing gearbox, poor door alignment or damaged handles. Continuing to force the key can make the problem worse, so early diagnosis is important. In most cases, replacing the faulty component and correcting the door alignment restores smooth, reliable operation without replacing the entire door.
Published Date: 27 June 2026
A full multipoint locking mechanism replacement is usually recommended when several components have failed, the mechanism is obsolete, the locking points are damaged, or the gearbox cannot be replaced on its own. If only the gearbox has failed, replacing that single component is often sufficient. A professional inspection and correct door realignment ensure the most appropriate repair is carried out, helping homeowners keep their existing door rather than replacing it.
Published Date: 27 June 2026
If your door locks normally when it's open but becomes stiff or won't lock once closed, the most likely cause is poor door alignment rather than a faulty lock. A dropped door or misaligned keeps place extra strain on the gearbox and multipoint locking mechanism, eventually leading to wear and failure. Correctly realigning the door and replacing any damaged components usually restores smooth operation without replacing the door.
Published Date: 27 June 2026
A multipoint lock can jam closed due to a failed gearbox, broken internal linkages, seized locking points, or a door that has been operating under excessive strain because of poor alignment. Continuing to force a stiff lock often makes the damage worse. In most cases, the door can be opened without damage, the faulty mechanism repaired or replaced, and the door realigned to prevent the problem from returning.
Published Date: 27 June 2026
Conservatory doors that hit or rub against each other are usually suffering from poor alignment caused by dropped doors, hinge wear or natural movement over time. Continuing to force the doors can damage the gearbox and multipoint locking mechanism. In most cases, professional realignment and replacing any worn lock components will restore smooth operation, allowing you to keep your existing doors rather than replacing them.
Published Date: 27 June 2026
A keyed alike lock system allows multiple doors to be operated using a single key, reducing the number of keys you need to carry while making everyday access more convenient. Suitable for most uPVC, composite, French and timber doors with euro cylinders, keyed alike locks provide the same level of security as individual locks when quality cylinders are used. It's an ideal upgrade when moving house, replacing worn locks or improving the convenience of your home's security.
Published Date: 27 June 2026
French door mechanisms usually show clear warning signs before they fail completely. Common symptoms include stiff handles, difficult keys, poor door alignment, handles that don't spring back, and locking points that fail to engage. Early diagnosis, replacing worn components and correctly realigning the doors can restore smooth operation, prevent emergency lockouts and avoid the cost of replacing the doors.
Published Date: 27 June 2026
A 3 point composite door locking mechanism secures the door at the top, centre and bottom, providing improved security and a tighter seal than a single-point lock. The system relies on a gearbox, multipoint mechanism, euro cylinder and correctly aligned door to operate smoothly. Common faults include worn gearboxes, poor door alignment and failed locking points, but in most cases these can be repaired without replacing the entire door.
Published Date: 27 June 2026
If your uPVC door locks at the bottom but not at the top, the most likely cause is poor door alignment or a dropped door preventing the upper locking points from engaging. Continued use can place extra strain on the gearbox and multipoint locking mechanism, leading to further damage. In most cases, realigning the door and replacing any worn components restores smooth operation without the need for a new door.
Published Date: 27 June 2026
Not all lubricants are suitable for door locks. Thick oils, grease, and general-purpose sprays can attract dirt, interfere with the lock's internal components, and shorten the life of the locking mechanism. For routine maintenance, use a lock-specific lubricant on the euro cylinder and lightly lubricate the moving locking points. If the lock remains stiff, the problem is often poor door alignment, a worn gearbox, or a failing multipoint locking mechanism rather than a lack of lubrication.
Published Date: 27 June 2026
Genuine door mechanisms are exact replacements manufactured to the original specifications, while universal or compatible mechanisms are designed to replace discontinued or obsolete locking systems. Both can provide reliable repairs when correctly selected, but accurate measurements, quality components and proper door realignment are essential. In many cases, replacing the gearbox or fitting a compatible mechanism allows homeowners to keep their existing door without the cost of a replacement.
Published Date: 27 June 2026
Simple maintenance can significantly extend the life of your uPVC or composite door. Regularly cleaning and lubricating locking points, checking door alignment, tightening loose handles and recognising early warning signs of wear all help reduce strain on the gearbox and multipoint locking mechanism. Addressing small issues before they become major faults keeps your door secure, reliable and helps avoid costly emergency repairs.
Published Date: 27 June 2026
Yes, most faulty uPVC and composite door mechanisms can be repaired without replacing the entire door. Depending on the fault, the repair may involve replacing the gearbox, fitting a new multipoint locking mechanism, or upgrading obsolete components. Correct door realignment is an essential part of the repair, helping to reduce strain on the new parts and ensuring a reliable, long-lasting solution.