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: 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.
Published Date: 27 June 2026
If your door lock works with the door open but becomes difficult to 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 causing wear and failure. Correctly realigning the door and replacing any damaged components usually restores smooth operation without the need for a replacement door.
Published Date: 27 June 2026
Many homeowners are advised to replace perfectly good doors when the real problem is a worn gearbox, failed multipoint locking mechanism, poor door alignment or another replaceable component. While some doors genuinely need replacing due to structural damage, most locking faults can be repaired at a fraction of the cost. A proper diagnosis should always come before recommending a new door.
Published Date: 27 June 2026
Replacing a lock doesn't always solve door problems. Many faults are caused by dropped doors, poor alignment, worn gearboxes or failing multipoint locking mechanisms rather than the lock cylinder itself. A proper diagnosis identifies the true cause, allowing only the necessary components to be repaired or replaced while ensuring the door is correctly aligned for a long-lasting, reliable repair.
Published Date: 27 June 2026
Euro cylinders are the key-operated part of a uPVC or composite door lock and are available in different sizes, styles and security ratings. Choosing the correct cylinder length helps prevent security weaknesses, while upgrading to a TS007 1 Star cylinder with a 2 Star handle or a TS007 3 Star cylinder improves resistance to lock snapping and other common attack methods. Correct sizing, quality components and professional fitting all contribute to a more secure and reliable locking system.
Published Date: 27 June 2026
Cheap online door parts may seem like a bargain, but incorrect sizing, poor-quality materials and inferior manufacturing can lead to difficult locking, premature failures and unnecessary expense. Choosing the correct, high-quality replacement parts and ensuring the door is properly aligned provides a more reliable, longer-lasting repair and often saves money over time.
Published Date: 27 June 2026
Giving a locksmith accurate information before a visit helps ensure the correct tools and replacement parts are available. Details such as the type of door, whether it's open or closed, how the lock is behaving, and clear photographs can often identify the likely fault before arrival. The more information provided, the quicker and more efficient the repair is likely to be.
Published Date: 27 June 2026
Composite doors combine multiple materials to create a strong, secure and energy-efficient entrance door. Their security relies on a multipoint locking mechanism, gearbox, euro cylinder and properly aligned door. Common problems include worn gearboxes, stiff handles, dropped doors and failing lock mechanisms, but most can be repaired by replacing the faulty components rather than the entire door. Regular maintenance and correct door alignment help extend the life of both the door and its locking system.
Published Date: 27 June 2026
A uPVC door is made up of several key components including the frame, hinges, handles, euro cylinder, gearbox, multipoint locking mechanism, hooks, rollers, deadbolts, latch and keeps. Each part plays an important role in security and smooth operation. Understanding how these components work together helps homeowners recognise early signs of wear and explains why most door problems can be repaired without replacing the entire door.
Published Date: 27 June 2026
This complete guide explains how uPVC door locks work, including euro cylinders, gearboxes and multipoint locking mechanisms. It covers common problems such as stiff handles, dropped doors, lock failures and security upgrades, while explaining why most uPVC door locks can be repaired without replacing the entire door. Proper diagnosis, quality replacement parts and correct door realignment are the key to a reliable, long-lasting repair.
Published Date: 27 June 2026
Not every door problem is caused by a faulty lock. Stiff handles, difficult keys and doors that won't lock are often the result of poor door alignment, worn hinges, dropped doors or failing gearboxes. Correctly diagnosing the underlying cause allows the right components to be repaired or replaced, helping homeowners avoid unnecessary costs and extending the life of their existing door and locking system.
Published Date: 27 June 2026
If your door key turns but the door won't open, the most common causes are a failed gearbox, damaged multipoint locking mechanism, or broken internal components. Avoid forcing the key, as this can make the problem worse. Most doors can be opened without damage, repaired by replacing the faulty parts, and realigned to restore smooth, reliable operation without the cost of a replacement door.
Published Date: 27 June 2026
Most uPVC doors aren't "insurance approved" simply because they're made from uPVC. What matters is the security of the complete door, including the multipoint locking mechanism, the euro cylinder, and the overall condition of the door. Upgrading to a high-security cylinder and ensuring the door is correctly aligned can help improve security and satisfy the requirements of many home insurance policies.
Published Date: 27 June 2026
Yes, in most cases you can replace just the locking mechanism without replacing the entire door. Whether the problem is a failed gearbox, worn locking points, or an obsolete multipoint mechanism, replacing the faulty components is usually a far more economical solution. A professional repair should always include checking and realigning the door to remove unnecessary strain and help the new mechanism provide many years of reliable service.
Published Date: 27 June 2026
Most uPVC door mechanism problems are caused by failed gearboxes, worn multipoint locking mechanisms, poor door alignment, or everyday wear. In many cases, the mechanism can be repaired by replacing the faulty components rather than the entire door. A complete repair should always include checking and realigning the door to remove unnecessary strain from the new parts, helping to prevent future failures and extend the life of the locking system.
Published Date: 27 June 2026
A failed gearbox is one of the most common causes of composite door lock problems. Symptoms include stiff handles, difficult keys, and doors that won't lock or unlock. In many cases, replacing the gearbox restores the locking system, although some doors require a complete multipoint mechanism if other components have worn or become obsolete. A professional repair should always include checking and realigning the door to reduce strain on the new parts and ensure a reliable, long-lasting repair.
Published Date: 27 June 2026
Door handle centres are the distance between the spindle and the keyhole, measured from centre to centre. This measurement must match the gearbox fitted inside the door, otherwise the handles won't fit correctly. While 92mm centres are the most common on modern uPVC and composite doors, older doors may use different sizes. Measuring correctly is essential when replacing handles, gearboxes, or upgrading obsolete locking mechanisms.
Published Date: 27 June 2026
A multipoint door lock mechanism secures a uPVC, composite, or French door at several locking points along its height, providing improved security and a tighter seal. Common faults include failed gearboxes, worn locking points, and poor door alignment. In most cases, the mechanism can be repaired by replacing the faulty components and correctly realigning the door, avoiding the expense of a complete door replacement.
Published Date: 27 June 2026
A door handle that doesn't spring back is often caused by worn handle springs, a failing gearbox, a dropped door, or a worn multipoint locking mechanism. While replacing the handles may solve the problem in some cases, it's important to diagnose the underlying cause. Correcting the door alignment and repairing any worn lock components will restore smooth operation and help prevent future lock failures.
Published Date: 27 June 2026
Older doors with discontinued or obsolete locking mechanisms can often be repaired, even when the original manufacturer no longer supplies parts. By sourcing compatible replacements, upgrading worn components, and correctly realigning the door, it's usually possible to restore smooth operation and improve security without the cost of replacing the entire door. Many older doors are still structurally sound—they simply need the right repair rather than a new door.
Published Date: 27 June 2026
If your door handle moves but the door won't open, the most likely cause is a failed gearbox, broken multipoint locking mechanism, or internal linkage failure. Avoid forcing the handle, as this can cause additional damage. In most cases, the door can be opened without damage, the faulty components replaced, and the door realigned to restore smooth, reliable operation without replacing the entire door.
Published Date: 27 June 2026
At A.L.S. Locksmiths, uPVC door lock replacement starts from £90 supplied and fitted for a standard Euro cylinder, £110 for a Snap Safe 1 Star cylinder, and £130 for a Snap Safe 3 Star cylinder. All prices are fixed, include fitting, there are no call-out charges, and no VAT. As a family-run business, we focus on repairing only what's needed and providing honest advice with transparent pricing.
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