Mortice Locks

B&B Locksmiths supplies, fits, repairs, and replaces mortice locks for timber front doors, back doors, internal doors, flats, rental properties, shops, and commercial premises across Oxford and Oxfordshire. Whether your mortice lock is stiff, worn, damaged, difficult to operate, missing its keys, or no longer suitable for your security needs, we can assess the problem, recommend an appropriate solution, and fit the replacement correctly.

 

Mortice locks are strong and reliable locks commonly fitted to timber doors. They are installed within a pocket, known as a mortice, cut into the edge of the door, providing a secure and discreet finish.

​

A mortice lock uses a key to move a bolt into the door frame, securing the door in place. Mortice locks are commonly used on front doors, back doors, internal doors, and commercial doors where dependable key-operated security is required.

​

The main types of mortice lock include:

• Mortice deadlocks

• Mortice sashlocks

• British Standard mortice locks

​​

A mortice deadlock uses a key-operated bolt without a latch. A mortice sashlock includes both a latch and a deadbolt, allowing the door to be opened using a handle and securely locked with a key.

​

For external timber doors, a five-lever mortice lock meeting BS 3621 may be recommended for improved security and may be required by some home-insurance policies. Customers should check the precise requirements of their insurer.

​

Not every five-lever mortice lock complies with BS 3621. A compliant lock should carry the appropriate British Standard marking or certification, and the correct lock must be selected to suit the door, frame, security requirements, and method of escape.

​

A mortice lock may need to be repaired or replaced if:

• Keys have been lost or stolen

• The lock has become stiff, worn, or damaged

• The bolt no longer operates smoothly

• The lock does not align correctly with the frame

• The property has changed ownership or occupancy

• Improved security is required

• An insurer requires a lock meeting a recognised British Standard

• The property has experienced a break-in or attempted break-in

​

Correct fitting and alignment are important. A mortice lock must align properly with the frame and keep so that the bolt operates smoothly, locks securely, and does not place unnecessary strain on the key or internal mechanism.

​

B&B Locksmiths can inspect your existing lock and supply, fit, repair, or replace suitable mortice locks, including mortice deadlocks, mortice sashlocks, and qualifying five-lever British Standard options.

​

For mortice-lock fitting, repairs, replacements, five-lever mortice locks, or British Standard security upgrades in Oxford and Oxfordshire, contact B&B Locksmiths for practical advice and a reliable local service.