When choosing a new door lock, you'll often see the term Sold Secure Approved. While many homeowners recognise the name, few know what it actually means or why it's worth considering.

A Sold Secure Approved lock has been independently tested to assess how well it resists common methods of attack. It provides reassurance that the lock has met recognised security standards rather than simply relying on the manufacturer's claims.

What Is Sold Secure?

Sold Secure is an independent testing organisation that evaluates security products against recognised attack methods.

Products are subjected to a range of tests to determine how well they withstand attempts to gain entry using techniques commonly used by criminals.

Products that pass these tests can display the Sold Secure approval mark.

To learn how Sold Secure fits alongside other recognised standards, read Understanding Door Lock Security Standards: TS007, Secured by Design, PAS 24 and Insurance Requirements Explained.

How Are Locks Tested?

Locks are tested to assess their resistance to methods such as:

• Lock snapping
• Drilling
• Picking
• Bumping
• Pulling
• Twisting
• General physical attack

The exact tests vary depending on the type of lock being assessed, but the aim is always to ensure the product performs to a recognised security standard.

For a closer look at the features found in modern high-security cylinders, see The Complete Guide to Euro Cylinder Door Locks.

Closer look at the features found in modern high-security handles, see  High security door handles.

Why Is Independent Testing Important?

Many locks look similar from the outside, but their internal construction can vary considerably.

Independent testing helps ensure that a lock has been assessed under controlled conditions rather than relying solely on marketing claims.

For homeowners, this provides greater confidence that the lock offers a proven level of security.

If you're comparing different locks, How to Compare Lock Specifications explains what to look for.

Does a Sold Secure Lock Prevent Burglary?

No lock can guarantee that a burglary will never happen.

However, a Sold Secure Approved lock is designed to make forced entry significantly more difficult by increasing the time, effort, and noise required to defeat it.

Opportunist burglars generally prefer easier targets, so improving your door security can act as an effective deterrent.

It's Not Just About the Lock

Even the highest-rated lock won't perform properly if the rest of the door isn't in good condition.

Your overall security also depends on:

• A correctly aligned door
• A properly functioning multipoint locking mechanism
• Quality security handles
• Strong hinges
• A secure door frame

All of these components work together to provide effective protection.

To understand how these components fit together, read Every Part of a uPVC Door Explained.

Proper Installation Matters

A high-security lock should always be fitted correctly.

For example:

• The lock should be the correct size for the door.
• The cylinder shouldn't protrude excessively beyond the handles.
• The locking mechanism should operate smoothly.
• The door should be correctly aligned.

Poor installation can reduce the effectiveness of even the best security products.

Is It Worth Upgrading?

If your door still has an older lock cylinder, upgrading to a Sold Secure Approved lock can improve resistance to modern methods of attack.

It's particularly worth considering if:

• You've recently moved home.
• Your existing lock is several years old.
• You're upgrading your home security.
• Your current lock has become worn or damaged.
• You're replacing a failed lock cylinder.

In many cases, upgrading the cylinder to 1 or 3 Star is a straightforward and cost-effective improvement.

For guidance on choosing the right security upgrade, see The Complete Guide to Upgrading Your Door Locks for Better Home Security.

Choose Quality Over Price Alone

The cheapest lock isn't always the best value. A quality, independently tested lock is designed to provide reliable performance and improved protection for many years.

When combined with a well-maintained door, correctly aligned locking mechanism, and good installation, a Sold Secure Approved lock can be an important part of your home's overall security.

To learn about other recognised security standards used for doors and locks, read A–Z of Door & Lock Security Standards.