bs3621 british standard lock

What is a BS3621 (British Standard) lock?

To keep your home and valuables safe, your exterior doors should conform to a minimum standard, such as BS3621. If a lock is not robust enough, it provides little challenge to intruders who might try and force entry.

As a home is burgled every two minutes in the UK, you should do everything you can to protect yourself. A BS3621 lock is an excellent first line of defence.

What is BS3621?

The ‘BS’ in BS3621 – British Standard – is a standards body that defines best practices for many industries. The BSI was founded over 100 years ago and sets its standards based on quality, reliability, and security. BS3621 is one of those standards.

What is a BS3621 lock?

The BS3621 standard was created in the 1960s and applies to locks used to secure most external doors in the UK. As a homeowner, it’s essential to check that your lock conforms to BS3621 as it guarantees a standard of quality – vital in protecting your home and your family.

BS3621 applies to wooden and timber doors in homes. It can also apply to some doors in industrial settings. To get technical, it’s a minimum standard for doors with ‘keyed egress’ – all that really means is that a key is used to open or lock the door.

For a lock to meet BS3621’s high standards, it must follow the following:

  • The lock should have at least five movable levers
  • Screws must not be accessible while the door is closed and locked
  • The lock must be protected from drilling – usually achieved with a metal plate
  • The lock must have at least 1,000 different key patterns.

There are many other minor requirements, but the above demonstrates how BS3621 ensures a good quality lock.

What are the benefits of BS3621?

Put simply, you know a BS3621 lock provides a quality defence for your property. They’re tested against some of the more common home invasion techniques, such as drilling and lock-picking, and must put up a certain amount of protection against them.

Likewise, BS3621 locks are also a minimum requirement of many UK home insurance companies. If you’re looking to insure your home or are looking at the cost to change locks, you should check that your locks are compliant.

How do I check if my locks are BS3621 compliant?

To identify a BS3621 lock, you need to do two things:

  1. You need to check the faceplate of the lock, which you can see on the side of the door when it’s open. The first thing you need to check for is the British Standard Kitemark. The Kitemark should be engraved on the lock if it’s compliant.
  2. If the BSI Kitemark is present, check underneath it for the standard number. You should see ‘BS3621’ stamped or engraved – it might have other information such as the exact standard year, such as 2017.

If these are both engraved on the lock, rest assured that it complies with BS3621. Contact a trusted local locksmith for advice if you’re unsure at any point.

Which locks comply with BS3621?

When looking for a new door lock, you should check that it conforms with BS3621. Many do, so you should have plenty of choices. Locks that typically meet the standard include:

  • Mortice sash lock
  • Mortice dead lock
  • Euro sash lock
  • Euro dead lock

Most night latches and rim locks also comply. Remember that a BS3621 lock needs a minimum of five levers, so three lever mortice locks won’t meet the criteria.

Up to standard

The BS3621 standard gives homeowners peace of mind that their homes are protected – and is a crucial requirement for most home insurance agreements. Get in touch with the York Locksmith Company today for expert advice on securing your home or business.

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