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Choosing a new door should be a straightforward and satisfying process. However, this isn’t the case when there are terms or expressions that you simply don’t understand. Security will always be at the forefront of your mind with a replacement door, so, to help you make an informed decision we have compiled a broad list of terms that are linked to door security.

Looking for a term that isn’t here? Contact the P&P Glass team for further clarification.

Door security glossary for homeowners in South London and Surrey

Anti-jemmy bars

Metal strips fitted to the lock edge of outward opening doors that prevent them being prised open.

Anti-snap locks / Bump resistant locks

Designed with two parts, if an intruder bypasses the front part, the locking mechanism will remain locked and intact.

Bottom pin

Locking component on door cylinders.

BS3621 locks

A lock standard for thief-resistant locks by the British Standards Institute (BSI). This is usually displayed on the faceplate of the lock, visible when you open the door. Look for the British Standard Kitemark and the number stamped underneath, e.g. BS 3621: 2017.

Deadbolts / Deadlocks

Typically, a deadbolt requires a key to open it and features a locking bolt that extends from the lock into the wall – making it immovable.

Deadlatch lock

Locks automatically when you close the door.

EN 1627-1630

A European standard for burglar resistance.

Euro Cylinder locks

Located in a lock case, euro cylinder locks operate by driving a deadbolt in the lock case into the frame of the door to secure it in place. Single, double and thumbturn euro cylinder locks can be vulnerable to lock snapping, however TS007-2014: 3 Star Kitemarked Euro Cylinders offer the highest level of security.

Hinge bolts / Dog bolts

Steel pins that are fitted into the hinge side of a timber door, or an inward opening door, to reinforce exposed hinges that are vulnerable to excessive force.

KUBU smart lock

Using ‘smart home’ technology, KUBU door locks allow you to monitor whether your door is locked or unlocked from a smartphone app.

Laminated Glass

Laminated glass reduces the chance of injury, thanks to an effective interlayer that holds the pieces together if broken.

Mortice lever locks

Mortice lever locks can only be opened with a key and are embedded into the actual door, by cutting a pocket into the edge of the panel. Mortice lever locks are typically used in traditional timber doors and are available with 2, 3, 5, or 7 levers.

Multi-point locking mechanism

Sometimes referred to as a ‘multi-point perimeter locking mechanism’, multi-point locking mechanisms securely bolt the door into the door frame at various points with one key. Considered as one of the most secure door locks, they create a tight, weatherproof, impenetrable seal.

PAS 24 accreditation

This UK Police crime prevention initiative is a rigorous test standard, used to assess the security performance of doors.

PAS24: 2016

The latest enhanced security performance requirement for doorsets in the UK. *

*Correct at time of publishing; April 2020.

Safety glass / Toughened glass / Tempered glass

Fitted into doors or other glazed areas that are lower than 800mm from floor level, safety glass effectively reduces the chance of injury by breaking into many tiny pieces if broken.

S-Glaze technology

Locks the glass into the door and doesn’t require a glazing bead, which ensures the glazing cannot be tampered with.

Shoot bolts

Bolts that tightly fix doors in place, e.g. one side of a timber French Door.


High quality uPVC doors are reinforced with steel frames to strengthen and prevent them from warping.

TS007:2014 + A1: 2015

TS007 is a UK standard specifically designed to eliminate the issue of door cylinder snapping and lock manipulation, which tests the security aspects of the cylinder and hardware around the cylinder. Endorsed by industry leaders Secured by Design, the Door and Hardware Federation and the GFF, the latest version is TS007:2014 + A1: 2015. *

*Correct at time of publishing; April 2020.

TS007 stars

Depending on how they perform in the test, 1, 2 or 3 stars are awarded to the locking components. To comply with TS007, the cylinder and hardware must have a cumulative total of 3 stars.

Assure Accreditation Kitemark Accreditation iwa-logo BSI

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