Cylinder or Euro locks
A cylinder lock is operated by the grooved edge of the key moving spring-loaded internal pins around inside the cylinder as the key is turned.
Cylinder locks come in three main types:
Typically, this would be a rim lock style with a cylinder locking mechanism - like what used to be called a 'Yale lock'.
Oval profile and Euro cylinder locks work with a mortice lock case fitted into the door.
The cylinder part of the lock that takes the key sits through the handle of the door and this can be replaced without having to change the lock case. For example, if you lose your key or want to change the key.
The handle has to be lifted for the lock to turn and when locked the handle can't be lifted.
A euro lock is the same as an oval lock except it's a different shape, like a keyhole.
All uPVC doors use a euro cylinder lock that sits within the handle and connects to a multi-point locking system in the door frame.
The multi-point locking system is a safe system but the cylinder lock has an inherent flaw that allows the cylinder of the lock to easily be snapped and overridden - thus making the multi-lock security redundant. Euro cylinders have been responsible for up to 25% of break-ins.
Anti-snap - in light of the issues of the euro lock, new anti-snap cylinder locks were developed and the police recommended that the original euro locks on older uPVC doors be replaced.
Look for a standard of TS 007 and SS312.
Note, Everest cylinder locks are not technically 'anti-snap' as the specialist lock has been developed to be even more secure. If the lock were to be 'snapped' the cylinder guard prevents the removal of the cylinder keeping your door secure.
All Everest door locks meet SS 312*** British Security Standards.
Double cylinder - a cylinder lock that can be key operated internally as well as externally is known as a double cylinder. This gives extra security because the lock can't be opened by breaking a window and reaching through but it does have building regulation restrictions (see below).
Restrictions to internal key-operated locks
When living in a property that only has one main door as an escape route or an upstairs apartment, a key that can be locked on the inside is not permitted by building regulations.
The door must have a lock that is thumb-operated on the inside for quick escape.
Also note, a lock must be fitted properly to be secure and in most cases, a registered locksmith is the best person to do this.
An ill-fitted cylinder lock is more vulnerable to 'snapping' attacks.
When buying a door lock, look for the following security standards:
- Five-lever mortice lock: BS 3621 or EN 13309
- Euro cylinder lock: TS 007 *** or SS 312 *** diamond
The best front door for security (recap)
|Timber door||uPVC door||Composite door|
|Best choice for security||⭐⭐⭐||⭐⭐⭐||⭐⭐⭐⭐|
As a recap, the best front door to keep your home secure are:
- A timber door with a five-lever mortice deadlock
- A uPVC door with an anti-snap cylinder lock and a multi-point locking system
- A composite door with either of the above locks
A secure front door is peace of mind for you and your family
Our doors have been tested by the police to withstand an attempted break-in for 15 minutes and therefore awarded the Secured by Design accreditation.
Is it time for a new front door?