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Types of door locks

For most of us security remains very important and securing doors essential. Whether you are looking to lock up your home, garage or shed this brief guide will help you learn the ABC of security.

Security levels for different types of door locks

  • Maximum security products comply with the latest British Standards and offer the maximum level of security protection. These locks should be used on your external front / back doors and are approved for use by the Police and Insurance companies.
  • High security products provide a high level of protection and features for internal doors and should only be used on external doors in conjunction with the above.
  • Standard security products offer convenient locking solutions and with basic security features for internal doors but should be used in conjunction with maximum security locks for external door.

Three common types of door locks

  1. Cylinder locks are an integral part of many types of locks that often go by different names - including including PVCu locks and some mortice locks used on timber doors. Cylinders can be easily replaced and changing the cylinder is an easy way to 'change the locks'. Before you buy, you need to ensure you know what type, size and security of cylinder you require as they come in a wide variety of types and sizes. they offer a good degree of security and are relatively easy to ‘change’ if this is required
  2. Mortice locks are available with deadbolts, latches or a combination of both (when they're called sashlocks) and hook and claw bolts that are used for sliding doors. They are fitted inside a lock pocket or a mortice cut out of the door. They are very common. When replacing it is important to know what type of mortice you have. Mortice locks are available in 2 sizes, 2 1/2" and 3". The size describes the position of the keyhole from the edge of the door
  3. Night latches come in a wide variety of styles and in two sizes with many different capabilities.  To know which size you have on your door, measure the distance between the edge of the door and the centre of the keyhole.  If this distance is 44mm then you'll have a narrow stile night latch.  If the distance is 60mm then you'll have a standard stile night latch.  Rim night latches are sometimes referred to as ‘Yale’ locks, but of course Yale makes lots of different locks and lots of different lock manufacturers make 'Yale' locks!

Local police can offer free advice on home security.

Find out more about other door furniture at our blog ‘All About Door Hardware’: http://www.ironmongeryonline.com/blog/door-hardware-guide/all-you-ever-needed-to-know-about-door-hardware.

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