Mortice Locks

B&B Locksmiths supplies, fits, repairs and replaces mortice locks for timber front doors, back doors, internal doors, flat entrance doors, rental properties, shops and commercial premises throughout Oxford and Oxfordshire. If your mortice lock is stiff, worn, damaged or difficult to operate or if the keys have been lost or stolen, we can assess the existing lock and recommend a suitable repair, replacement or security upgrade.

 

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.

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A mortice lock uses a key to move a bolt into a keep fitted to 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.

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Types of Mortice Locks

The main types of mortice lock include:

• Mortice deadlocks

• Mortice sashlocks

• Five-lever British Standard mortice locks

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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.

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Five-Lever British Standard Mortice Locks​

For suitable 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 specified by their insurer.

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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 escape arrangements.

 

​When Might a Mortice Lock Need Repair or Replacement?

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​

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Correct Mortice Lock Fitting and Alignment​

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.

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Mortice Lock Fitting and Repairs

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 mortice locks meeting BS 3621.

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If you need mortice lock fitting or repairs, mortice lock replacement, a five-lever mortice lock or a British Standard security upgrade anywhere in Oxford or Oxfordshire, contact B&B Locksmiths for practical advice, professional fitting and reliable local service.