• Door Locks Guide

  • Cylinder lock
    Cylinder Locks

    Cylinder locks are a common type of lock used on doors. You should check with your insurer whether this type of lock is acceptable  Some types of cylinder locks are vulnerable to a technique known as lock snapping.

    • They can be used for internal and external use
    • They are easy to install
    • They can be used on UPVC and composite doors
    • Look for the Kitemark or ES symbol
  • Mortice lock
    Mortice Locks

    Mortice deadlocks are one of the common type of locks referred to in a policy.  A mortice lock requires a key to both lock and open it.  Your insurer might request that the lock complies with British Standard BS3621.

    • This lock is for external use and has a harder to break design
    • Look for the Kitemark symbol
    • Ensure there are at least five levers marked on face plate
  • Multi-point locking system
    Multi-Point Locking System

    Multi-point locking systems are commonly used and are mainly used on UPVC doors.  This type of locking system has a minimum of three locking points which all lock simultaneously when the key is turned.

    • They are used externally such as for garage and patio doors
    • They have a minimum three locking points
    • They lock using hook bolts, camrollers or pins
    • All the points lock simultaneously
  • Night latch
    Night Latches

    These locks are more a secondary lock and should not be used as the only lock on the door.  There are two types and these are standard night latches and deadlock night latches.

    • Standard night latch - Unless the latch is held by the catch this lock will lock the door automatically when it is closed
    • Deadlock – This locks the door automatically and you require a key to open the door from both the inside and the outside
    • Deadlock latches are more secure
    • This lock can be used as extra security as an addition to a more secure lock
  • Key operated security bolt
    Key Operated Security Bolts

    It is common to find this type of lock being used on external doors, including French and double doors. Your insurer might specify that key-operated security bolts should be fitted to both the top and bottom of the door.

    • They can be surface-mounted or fitted into the door
    • For French and double doors these should be fitted to the final closing door and positioned vertically
    • Surface-mounted bolts are only as strong as the screws which hold them in place
    • A mortice bolt is more secure than a surface mounted bolt.  If the key is removed, the bolt cannot be opened or easily manipulated
  • Sliding patio door lock
    Sliding Patio Doors

    These kinds may be specifically referred to in a policy because the lock requirements will differ slightly from a standard door.  Sliding patio doors can be vulnerable because they can be lifted off their runners.

    • These doors tend to open onto the garden or into a conservatory
    • They have key-operated multi-point locking systems or key-operated patio door which lock at the top and bottom.  Check your policy wording.
    • An anti-lift device may be required
  • Straight shackle padlock
    Straight Shackle Padlocks

    The type of locks are often used for locking shutters, gates, barriers and chains.

    • They are easy to fit
    • They are more difficult to attack than open shackle locks
  • Open shackle padlock
    Open Shackle Padlocks

    These padlocks are the most common types of padlock you will see.

    • They are commonly used on sheds, gates and lockers
    • They do not meet minimum home insurance security requirements
    • They are easy to cut with bolt cutters or a saw because of the shackle height
  • Closed shackle padlock
    Closed Shackle Padlocks

    This type of padlock is more difficult to attack and its design helps to prevent bolt cutters and saws getting to the shackle, which is the most vulnerable part of a padlock.

    • It is used on garden sheds, chains and gates
    • It offers minimum security – check your home insurance policy wording
    • It has a lower shackle height and therefore more difficult to attack
  • Long shackle padlock
    Long Shackle Padlocks

    Long shackle padlocks allow for more flexibility.  However, they are easier to disable as the shackle part of the lock can be easily attacked with bolt cutters or a saw.

    • They are often used on garden sheds and gates
    • They are easy to use
    • They are easy to break with bolt cutters or saw
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