Fire rated mortice locks provide critical fire safety protection, secure locking, and compliance for timber and metal fire doors. At Duffells, our comprehensive range includes BS3621-compliant locks, Euro cylinder mortice locks, sashlocks, deadlocks, and bathroom locks designed specifically to meet rigorous fire safety standards. We supply trade customers with dependable mortice locks from trusted manufacturers such as Union, ERA, Legge, Briton, and TSS.

Fire rated mortice locks combine robust security with fire resistance, making them essential for commercial, residential, and public sector installations. Tested rigorously to industry standards, these locks ensure fire doors remain secure while resisting fire spread, smoke ingress, and maintaining integrity for specified periods—typically 30 or 60 minutes.

Duffells stocks fire rated mortice locks that comply with British Standards (BS3621:2007), insurance requirements, and building regulations. Whether sourcing locks for fire door replacements, new builds, or retrofits, our extensive inventory provides optimal security and assured fire compliance.

Duffells offers various fire rated mortice locks, including:

British Standard (BS3621) Mortice Locks:

Union Strongbolt BS3621 5 Lever Deadlocks and Sashlocks.
ERA Fortress BS3621 5 Lever Deadlocks and Sashlocks.
Legge Value BS3621 5 Lever Locks.

BS3621-compliant locks satisfy insurance requirements, providing optimal security alongside certified fire resistance.

Euro Cylinder Mortice Locks:

TSS Euro Mortice Deadlocks and Sashlocks.
Union L2C25 Euro Deadlocking Mortice Nightlatch.
Union L2C26 Euro Escape Mortice Sashlock.

These locks offer compatibility with Euro profile cylinders, facilitating master key systems and convenient access management.

Bathroom Mortice Sashlocks:

Union 22WC Strongbolt Bathroom Locks.
Briton 5430 Bathroom Mortice Sashlock.

Designed specifically for bathrooms or internal privacy doors, ensuring fire resistance, privacy, and convenient internal operation.

Fire Resistance: Certified fire rating typically 30 or 60 minutes.
Lever Variants: 5 Lever (insurance-rated BS3621), 3 Lever (standard security), and Euro Cylinder versions available.
Security Standards: British Standard (BS3621), tested against forced entry, drilling, picking, and saw attacks.
Suitable Door Types: Timber, metal, and composite fire doors.
Insurance Compliance: BS3621 locks meet most UK insurance and fire safety requirements.

Duffells partners with industry-leading brands to ensure quality and reliability:

Union: Strongbolt, BS3621 Locks, Euro Cylinder Mortice Locks.
ERA: Fortress BS3621 Series, Viscount Non-BS 5 Lever Series.
Legge: Affordable Value BS3621 locks providing robust security.
Briton: High-quality bathroom locks suited to commercial and residential applications.
TSS: Reliable Euro Cylinder Mortice Locks.

Identify the ideal fire-rated lock based on:

Fire Rating: Ensure the lock matches your door’s fire certification requirement.
British Standard Compliance: Select BS3621 locks for external or high-security internal doors.
Lock Type: Deadlock, sashlock, nightlatch, or bathroom lock depending on door usage and privacy needs.
Door Thickness and Backset: Measure correctly to guarantee proper fit and reliable operation.

Duffells’ expert trade support can assist with identifying and selecting the ideal fire-rated mortice lock for your application.

Duffells is committed to swift service and expert trade assistance, offering same-day dispatch for orders placed before our cut-off. Our knowledgeable team supports installers, locksmiths, and property managers, providing technical advice, fast shipping, and extensive product availability.

A: BS3621 certifies locks against forced entry, ensuring security and meeting UK insurance requirements alongside fire safety.

A: Non-BS3621 locks can be fire-rated but may not comply with insurance or high-security needs; they are suitable for internal doors or lower-security environments.

A: Many Euro cylinder mortice locks have fire ratings. Confirm with manufacturer specifications or Duffells support team.

A: Bathroom doors in fire-rated premises typically require fire-rated locks and hardware, ensuring compliance and safety.

A: Yes. Euro cylinder mortice locks can accommodate keyed-alike or master key systems for larger commercial or residential applications.

A: Measure from the lock’s faceplate edge to the centre of the spindle/keyhole; common backsets are 44mm, 57mm, and 76mm.

A: Occasional lubrication, alignment checks, and inspection ensure longevity and maintain fire rating compliance.

Duffells provides industry professionals with dependable, fire-rated mortice locks meeting stringent safety and security standards. Whether upgrading to British Standard locks or maintaining fire door compliance, trust Duffells to deliver reliable solutions, rapid dispatch, and expert advice to meet your project's precise needs.