What is a mortice latch used for?

A mortice latch is used to keep an internal door closed without locking. It fits into a morticed pocket inside the door edge and is operated by a handle or knob.

What size mortice latch should I choose?

2.5-inch latches (64mm) are commonly used with door handles on backplates. 3-inch latches (76mm) are ideal for mortice knobs or handles on roses. Always measure your backset for a perfect fit.

Can I use a mortice latch on a fire door?

Yes, but it must be a fire-rated latch that complies with BS EN 12209. Check the product specification before installation on any fire door.

Mortice Latches

Q: What backset is best for mortice knobs?

A minimum 3-inch (76mm) latch is recommended for mortice knobs – but a longer latch is often better if your door allows. This ensures you don’t bang your knuckles when turning the knob.

Mortice Latches for Internal Doors – Tubular, Flat & Upright Styles

Browse our expertly curated range of mortice latches for internal doors – including tubular, flat and upright styles in multiple sizes and finishes, available for fast UK delivery.

What is a Mortice Latch?

A mortice latch is a spring-loaded latch mechanism that sits neatly inside a morticed pocket in the edge of a door. Commonly used for internal doors, it holds the door shut when no lock is required. These latches are compatible with both handles and knobs, offering a sleek, flush finish.

Pros and Cons of Mortice Latches

✔ Benefits

Clean and concealed finish
Available in standard sizes like 64mm and 76mm backsets
Works with both handles and mortice knobs
Fire-rated options available (BS EN 12209 compliant)

✘ Considerations

Not designed for use on external doors without additional locks
Knob clearance can be limited with short backsets

Types of Mortice Latches Available

We supply all three major types of internal latches to suit modern and traditional installations:

Tubular Mortice Latches – The most common and easiest to install
Flat Mortice Latches – Great for period properties and heavier knobs
Upright Mortice Latches – Match the look of sashlocks without the lock

Nationwide Availability & Support

Available for fast delivery to London, Manchester, Birmingham, Leeds, Glasgow and across the UK. If you’re unsure which size or type you need, contact us and our experts will help.

From The Anvil Heavy Duty Latch Black Sku 90125

Understanding Mortice Latch Types

Choosing Between Tubular, Flat & Upright Mortice Latches

The three main types of mortice latches all serve the same function – to keep an internal door closed – but are designed for different needs:

Tubular Mortice Latches: Slim and round-ended, easy to install with minimal drilling. Best for modern internal doors. Available in backsets such as 45mm, 57mm, and 64mm. Ideal when fitting door handles on rose.
Flat Mortice Latches: Rectangular, deeper body. Often chosen for restoration projects or heritage properties. Suitable for use with heavier knobs or rim-style door furniture.
Upright Mortice Latches: Larger, boxier units that match the profile of a mortice sashlock (but with no lock). Used for visual consistency across doors with and without locks.

All types are compatible with our range of premium door handles and knobs and are offered in matching finishes to maintain a cohesive interior aesthetic.

Need Technical Advice?

Speak to Our Ironmongery Experts

Whether you're working on a domestic renovation, commercial fitout or heritage restoration, our team can guide you through everything from mortice latch sizing to BS EN 12209 fire door compliance.

We've been supplying UK ironmongery for over 40 years and are trusted by joiners, architects and builders across the country.

Need help choosing between a 2.5” tubular latch and a 3” upright latch? Contact us today for personalised support and technical advice.

Frequently Asked Questions

Can I replace my old mortice latch easily?

Yes – just match the size (usually 2.5” or 3”) and ensure the new latch type is compatible with your handle or knob.

Are mortice latches suitable for wooden doors?

Absolutely. They're most commonly used on wooden internal doors across UK homes and commercial buildings.

What backset is best for mortice knobs?

For mortice knobs, a minimum 3” (76mm) latch is recommended – but if your door construction allows, a longer latch is often better. This ensures your hand is far enough from the edge of the door so you don’t bang your knuckles when turning the knob.

What finishes are available for mortice latches?

We offer mortice latches in satin chrome, PVD brass, matt black, stainless steel, polished nickel and antique styles to suit any décor.

Why Trade Door Handles?

Trusted UK Supplier of Mortice Latches Since 1976

Trade Door Handles is a long-established ironmongery supplier with a legacy stretching over four decades. We supply high-quality mortice latch mechanisms from leading manufacturers like:

Our products are used nationwide – from new builds in Nottingham to listed buildings in York. We offer fast delivery to London, Birmingham, Edinburgh and every part of the UK.