The BS 8621 Kitemark has the same protection as BS 3621 but offers a method for keyless egress from the property at all times. Generally recognised as giving the maximum protection to the majority of timber doors fitted to domestic or commercial properties. Generally, single-point locks are fitted to traditional timber doors and many insurance companies will specify that as a minimum a BS 3621 five lever mortice lock must be fitted to all external timber doors of a property. The BS 3621 Kitemark is designed to be awarded to those locks that offer protection against drilling, picking, cutting or forcing. It covers locks that are operated by a key from both the inside and outside of the door. BSI (British Standard Institution) is the business standards company that helps organisations all over the world with testing and training, to ensure products and services that consumers purchase meet certain criteria of excellence.īS 3621 is a British Standard test and performance specification for thief‑resistant mechanically operated single-point locks. Some of which we will discuss here in more detail. Many locks are also subjected to independent testing to provide assurances that they conform to certain technical and security standards. ![]() A separate escutcheon may be provided to cover the cylinder once on the door. ![]() If the cylinder is swapped for an alternative, the lock and cylinder combination will no longer meet the required specification. If any technical standards are associated with the lock (see the following section), you must ensure both the lock and the cylinder are fitted together. Cylinders may be either a euro profile design or oval shape depending on the application. Mortice locks that use cylinders are normally supplied as a kit that includes both the lock and a suitable cylinder. For deadlock mortice locks, a separate escutcheon is generally provided to cover the keyhole once fitted in the door. For internal doors, the use of 2 or 3 lever locks may be suitable as they generally don’t need the same level of security as an external door. It’s essential that when fitting a mortice lock to an external door that you use a 5 lever lock for the highest level of protection. So for example, a 5 lever mortice lock provides a much greater level of security than a 2 or 3 lever lock. Levers are numbered and generally, the higher the number of levers that the lock has, the greater security the lock provides, but it’s worth checking the technical specifications of the individual lock to be certain. A mortice that uses traditional key locking is fitted with levers and it’s the combination of these levers that gives the lock its security. In terms of lock operation, a mortice lock may use either traditional key locking or a cylinder. Read our complete guide to front door security and hardware options here.Traditional key locking and euro cylinder operation Front doors with a lower price is often an indicator of their quality and can sometimes hinder security. Be sure to go through the proper channels in securing a reliable vendor.
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