Locks

Types of Locks
Cylinder rim locks are fitted to the surface of doors and are used primarily as a convenient security lock for front doors. They can also be used for back doors. They are available in a number of styles and offer a range of features.

Mortise locks provide greater security by being embedded into the door itself. A mortise lock is less vulnerable to forced attack than a surface mounting lock. They can be used for securing front, back and side doors.

Whilst Cylinder rim locks are relatively easy to fit unless you are a competent DIY person you should arrange for a member of the Master Locksmith's Association to fit a mortise lock. That person will be able to advise on the range of additional features each lock has and help you decide on the most appropriate lock for you.

The following types of lock should be considered for effective security measures to doors.

Front Door
A front door should have a British Standard 3621 Kite Marked 5 or 7 lever mortise lock as well as a cylinder rim lock. A door chain would also be advisable. The Association of British Insurers recommends that outside doors should have deadlocks that conform to BS 3621 and some insurers will give a discount on insurance premiums if such a lock is fitted.

Back Door
Back doors should also be fitted with a 5 or 7 lever BS3621 mortise lock with top and bottom door bolts.

Glazed Door
For glazed doors it is important that the lock has a lockable handle. This prevents forced entry by breaking the glass and reaching in to release the lock.

Patio Door
Sliding patio doors are particularly vulnerable to forced entry and extra care should be taken to ensure that these entry points are secure. Patio doors are installed by being levered onto tracking. Patio door locks should be fitted to both the top and bottom of the sliding door to increase protection against forced attack.