Lock & locksmithing FAQs

Answers to common door lock & locksmithing questions

Our lock and locksmithing FAQs cover common questions about locks, locksmith services, home and commercial property security, giving you straightforward advice to help you make confident decisions when you need assistance.

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1. Lock knowledge

A good locksmith isn’t just someone who opens doors, they should understand home security. They should educate customers rather than simply sell.

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Will you explain any security weaknesses you notice?

Yes. If I identify a security weakness while working on your door or lock, I will explain what I’ve found and why it could present a risk. I’ll also recommend practical improvements where appropriate, such as upgrading an older cylinder, improving the locking mechanism or addressing issues with the door itself.

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Can you recommend improvements without pressure to buy?

I believe you should understand your options before making any decision, so I’ll explain the benefits, costs and level of protection associated with any recommended upgrade. I’ll never pressure you into unnecessary work and will only recommend improvements that we believe are genuinely worthwhile for your property.

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What are the strengths and weaknesses of standard euro cylinders compared with anti-snap cylinders?

Standard euro cylinders are widely used, readily available and generally cost less than higher-security alternatives. They can provide a suitable level of security for many properties, particularly when they are correctly fitted and combined with a good-quality door and locking mechanism. However, basic cylinders may be vulnerable to lock snapping, a method of attack that can allow an intruder to gain access to certain types of euro-cylinder locks.

Anti-snap euro cylinders offer additional protection by incorporating a sacrificial section designed to break in a controlled way if someone attempts to snap the cylinder. This helps prevent access to the locking mechanism and can significantly improve resistance to this type of attack. Many higher-security cylinders also provide additional protection against other common attack methods.

The main disadvantage is that anti-snap cylinders generally cost more than standard cylinders. However, for many homes and businesses, the additional protection makes them a worthwhile upgrade, particularly where older or basic euro cylinders are currently fitted.

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Which door lock manufacturers do you trust most and why?

I work with established manufacturers that have a strong reputation for quality, reliability and security. Depending on the type of door and locking system, these may include brands such as Ultion, Yale, ERA, ABS and other reputable manufacturers.

Rather than recommending one brand for every situation, I consider the type of door, existing locking mechanism, level of security required and your budget before suggesting a suitable product. I recommend locks and cylinders that offer reliable performance, good resistance to common attack methods and strong manufacturer support.

I can explain the differences between the available options, including their security features, warranty and expected lifespan. This allows you to choose a product based on its suitability and security rather than simply paying for the most expensive lock.

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Do you install anti-snap cylinders?

Yes, I install high-quality anti-snap euro cylinders where they are suitable for the existing door and locking system. Anti-snap cylinders provide additional protection against lock snapping, a technique that can affect some standard euro cylinders.

I will assess your existing cylinder and explain whether an upgrade would improve your property’s security. Where appropriate, we’ll recommend a suitable cylinder based on the type of door, locking mechanism and level of protection required.

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Are you familiar with the latest lock snapping and bumping protection?

Yes. I keep up to date with developments in lock security and the latest methods used to attack common locking systems. This includes understanding vulnerabilities such as lock snapping and bumping, as well as the security features available to help protect against them.

When assessing a lock, I consider its design, age, condition and how it is fitted before recommending any security improvements. I can explain the advantages of features such as anti-snap cylinders, anti-bump protection and other high-security locking solutions.

My aim is to recommend practical security improvements that suit your property and provide a worthwhile increase in protection, rather than simply replacing locks unnecessarily.

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2. Lock opening & non-destructive entry

A skilled locksmith should attempt to open doors without drilling wherever practical. Good answers acknowledge that drilling is sometimes unavoidable but is generally a last resort.

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Will you always attempt non-destructive entry first?

Yes. Wherever possible, I will always attempt non-destructive entry before considering methods such as drilling or replacing the lock. I use my experience, specialist tools and knowledge of different locking systems to determine the safest and most appropriate way to regain access.

However, some locks may be damaged, faulty or secured in a way that makes non-destructive entry impossible or impractical. If more invasive work becomes necessary, I’ll explain why before proceeding and discuss the available options with you.

My priority is to regain access while causing as little damage as possible and keeping any additional costs to a minimum.

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Under what circumstances would drilling be necessary?

Drilling is normally a last resort and may become necessary when non-destructive entry methods cannot safely open the lock. For example, a lock may have suffered internal damage, become severely seized, or have a mechanism that has failed in a way that prevents normal operation.

My priority is always to use the least invasive method available, so I only drill when other suitable options cannot provide safe and effective access.

Before drilling, I will assess the lock and explain why I believe it is necessary. I will also discuss alternative options and the likely cost of replacing the damaged lock or cylinder.

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3. Security knowledge

A trustworthy locksmith will explain that not every situation requires wholesale replacement.

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How has lock snapping changed the locks you now recommend?

Lock snapping has made cylinder security an increasingly important consideration, particularly for uPVC and composite doors fitted with euro cylinders. Older standard cylinders may offer limited protection against this type of attack, so I now consider the cylinder’s resistance to snapping and other common attack methods when recommending a security upgrade.

Where appropriate, I will recommend a high-security anti-snap cylinder, particularly for properties with older or vulnerable locks. I’ll consider the existing door, multipoint locking system and overall security rather than automatically recommending the most expensive option.

A suitable high-security cylinder can provide significantly better protection, while still allowing you to keep the existing door and locking mechanism.

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Can you explain the differences between TS007 and Sold Secure approved cylinders?

Yes. TS007 and Sold Secure are different security standards or approval schemes, although both can help you identify products that have undergone independent security testing.

TS007 is a British Standard specification for cylinders and associated security requirements. Euro cylinders are commonly described as 1-star or 3-star, with 3-star cylinders providing a higher level of tested resistance to attack.

Sold Secure is an independent testing and certification organisation that assesses security products against defined attack methods and awards different approval grades. A Sold Secure approval can therefore provide additional reassurance that a product has been independently tested.

The two systems are not directly interchangeable, so it’s important to check exactly what certification a particular cylinder carries and what level of protection it provides. I can explain the differences between suitable products and recommend a cylinder based on your door, locking system and security requirements rather than simply choosing the highest-rated option.

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Do you recommend upgrading every lock in a house after a burglary?

Not necessarily. After a burglary or attempted break-in, I recommend assessing the property’s overall security rather than automatically replacing every lock.

IU’ll inspect the locks, cylinders, doors and other accessible entry points to identify how the intruder gained access and whether any other areas may be vulnerable. If a lock has been damaged, compromised or provides inadequate protection, I’ll explain whether replacing or upgrading it would improve security.

In some cases, upgrading specific locks or cylinders may provide a significant improvement without replacing every lock in the property. WI’ll explain the options, costs and benefits clearly, allowing you to prioritise the work that offers the greatest security improvement.

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When would you recommend replacing rather than repairing a lock?

I recommend replacing a lock when repairing it would not provide a safe, reliable or cost-effective long-term solution. This may be the case if the lock has suffered significant internal damage, is badly worn, has become obsolete or replacement parts are no longer available.

I’ll always assess whether the existing lock can be repaired first and, where practical, replace individual components rather than the complete lock. However, if the lock is providing inadequate security or a repair is likely to fail again, replacement may be the better option.

Before carrying out any work, we’ll explain what has failed, why we recommend replacement and what alternatives are available, so you can make an informed decision without paying for unnecessary work.

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4. Diagnostic ability

Experts usually ask for information about door type, lock type, symptoms, whether the key turns, whether the door opens, brand if known.

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How do you diagnose a problem before giving a quotation?

I start by identifying exactly what has gone wrong rather than simply assuming the solution. Where possible, I inspect the door, lock, cylinder, handles and locking mechanism to identify the cause of the problem. I may also check for signs of wear, misalignment or damage that could be affecting the door of lock function.

Once I understand the fault, I explain what needs to be repaired or replaced and discuss the available options with you. I then provide a clear quotation before carrying out any work, so you know what the job will cost and can make an informed decision without unexpected charges.

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What information do you ask customers before attending?

Before attending, I ask a few straightforward questions to understand the problem. I usually ask for your location, the type of property, what has happened, and whether you can currently access the property.

I will also ask about the door and lock, such as whether it is a uPVC, composite, wooden or aluminium door, and whether you have a key that is broken, lost, damaged or simply not working. If you can provide photographs of the lock, door or handles, these can also help me assess the problem. This information helps me prepare properly, provide a more accurate quotation where possible and avoid unnecessary delays when I attend.

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5. Parts & products

The quality of replacement locks matters. Experienced locksmiths should be familiar with brands such as Yale, ERA, Ultion, APECS, ABS and Banham where appropriate.

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What makes one door or window lock better than another?

The quality and security of a door or window lock depend on several factors, including its design, materials, resistance to common attack methods, reliability and how well it suits the door or window it’s fitted to. A higher-priced lock isn’t automatically better if it isn’t appropriate for the existing locking system.

For example, a high-security euro cylinder may offer greater resistance to snapping, picking, drilling and bumping than a basic cylinder. Other locks may provide additional security features or stronger components designed to withstand forced entry.

I also consider the quality of the door, frame, handles and surrounding locking mechanism, as these all contribute to the property’s overall security.

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Which lock brands do you normally fit?

I work with a range of established lock manufacturers, selecting products based on the type of door or window, the existing locking system and the level of security required. Depending on the application, this can include well-known brands such as Ultion, Yale, ERA, ABS and other reputable manufacturers.

I don’t believe in fitting the same lock to every property. Instead, I’ll assess the existing system and recommend a suitable product based on its security features, reliability, compatibility and overall value.

I’ll explain the differences between the available options, including their security ratings, features and warranties, so you can choose the right lock for your property without paying for protection you don’t need.

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Do you install insurance-approved locks?

Yes. Where appropriate, I can install locks that meet recognised security standards and may satisfy your insurer’s requirements. The exact requirements can vary depending on your insurance policy, property and the type of door or window, so it’s important to check your policy before choosing a replacement lock.

For example, some insurers may require a specific British Standard or security rating for external doors and windows. I’ll help you identify suitable options and explain the relevant security features and certification before carrying out the work.

If you’re upgrading your locks to meet an insurance requirement, I recommend confirming the exact specification with your insurer first. This helps ensure the lock you choose provides the required level of protection and meets the conditions of your policy.

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Do you offer different quality door locks and options?

Yes. I offer a range of door locks and security options to suit different properties, budgets and security requirements. Depending on your existing door and locking system, we can discuss options ranging from reliable standard replacements through to higher-security cylinders and locks with enhanced protection against common attack methods.

I don’t believe you should automatically pay for the most expensive option. Instead, I’ll assess your existing lock and explain the differences in security, features, durability and cost between suitable products.

I’ll then recommend an option that provides the level of protection you need while offering good long-term value. You can make the final decision with a clear understanding of what you’re getting and why I’ve recommended it.

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Do you carry all the necessary parts and lock in your van?

I carry a wide range of commonly required locks, cylinders, handles, gearboxes and multipoint locking components in my van, allowing me to complete many repairs during the initial visit. I also carry specialist tools and equipment to work on a variety of door and locking systems.
However, no mobile locksmith can realistically carry every possible lock or obsolete mechanism. If your door requires a less common or specialist part, I’ll identify the exact component needed and explain the options for sourcing it.

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