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Choosing A Door Lock For Wooden Doors


Choosing the right door lock for your timber doors is incredibly important if you want to keep your house secure. There are many different types of door lock to choose from and the best choice will be dependent on the type of door you need to secure. Here is a quick guide to door locks to help you make the right decision for a safe and secure home.

A & T Carpentry give you an overview of the 6 most used lock types in the home.

Mortice Deadlock

This type of lock is a bolt operated with a key.  Its usually used alongside another type of lock such as a nightlatch. Fitted around waist height, the door can be locked from the inside or the outside with a deadlock.

5 lever mortice deadlock
mortice sash lock

Mortice Sashlock

This kind of lock is a combination of a mortice lock and a latch mechanism. It enables you to open and close the door without having to use a key, but you can also lock it securely with a key when you leave your home. For the best security choose a 5 lever sashlock.  If you need to secure internal doors with a key then choose the standard 3 lever sashlock.


Ideal for securing external entrance doors, the nightlatch allows you to open and close the door from the inside, with a lever,  as you would with an ordinary doorknob or handle. It will lock simply by you closing the door again. From the outside,  a Yale  key is required to unlock the door.

internal door night latch
rim cylinder lock

Rim Cylinder

A rim cylinder lock is always used alongside a nightlatch. It is a key turning mechanism that allows you to open your front door from the outside using a key. A nightlatch will usually come with a rim cylinder provided.

single cylinder rim lock

Single Cylinder Lock

double cylinder lock

Single Cylinder Lock

internal door thumb turn lock

Thumb Turn Lock

Locks for PVCu Doors

Many of the lock types available for wooden doors are suitable for use with PVCu doors too. A key difference between locks for timber doors and locks for PVCu doors is the inclusion of a euro cylinder.

There are three basic kinds of euro cylinder, each forming an important part of most locks from multi-point locks to mortice locks. They are easy to replace and are the most popular choice of lock. The type of cylinder you choose is dependent on the level of security you require. 

Single Cylinder

The door can be opened on one side only with a key.

Double Cylinder

The door can be opened on both sides with a key.

Double Cylinder with a Thumb Turn

The door can be opened on one side only with a key and thumb turn from the other side.

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