The 5 lever lock mortice deadlock is a type of lock often required for home insurance and are generally recommended by the police for home security. It should be fitted to the lower side of the door to give you the most resistance against forced attack, ie someone kicking the door. There are various grades but the current British Standard (BS3621:2007) is usually required for insurance purposes, and must be locked when the property is empty, otherwise your contents insurance is invalid.
A 5 lever British Standard (BS3621) lock is frequently referred to as a Chubb lock, which is the most famous brand name which is unfortunately no longer with us although the locks are still manufactured in the same factories by the same people but rebranded Union, although there are a great many manufacturers, including Yale, Union, Asec, Securefast, Legge Era etc.
The difference between the old and new British Standard is the size of the bolt which locks into the frame of the door. The new BS3621 calls for a bolt throw of 20 mm rather than the 14 mm of the old British Standard. Most BS3621 locks have anti pick devices built in to reduce the chance of lock picking.
Alexandra Locksmiths fit locks, grilles, intercom systems, safes and all other security devices and we cover North London, East London, West London and Central London.
Alexandra Locksmiths proud to be serving London for two decades. An approved company of The Master Locksmith Association.
Click on the link below for more security advice and to see what your insurance company require you to have to comply with your contents insurance more security advice and to see what your insurance company require you to have to comply with your contents insurance
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