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Latham’s ultra high security steel door

High Security Steel Door (Ultra Duty)

From £309.99 + VAT (£371.99 inc. VAT)

Our most secure steel door yet, weighing up to 100kg! Known as the Ultra Duty High Security Steel Door, it boasts a more robust stainless steel multi point locking system and a 40% thicker door compared to our Heavy Duty Security Door range, and now features a UAP 1* kitemark security cylinder as standard.

It also features an innovative ‘barb style’ jemmy bar lip and optional UAP 3* Kitemark cylinder upgrade package for added security.

Also available as a high security steel double door, in sizes from 1295mm to 2195mm wide.


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Category: GTIN: 5060479951284


Our Strongest Steel Door Yet

Developed to stand up to the toughest of tasks, our Ultra Door is capable of withstanding many types of attack due to its deeper core and galvanised steel construction. See additional information for full specification.

Versatile and Appealing

The Ultra Door comes powder coated in white (RAL 9003) as with all Latham’s steel doors we offer a powder coating service so you can match your door and frame to your building and surroundings. Discreet protection guaranteed.

Advanced Security

Supplied as standard with a UAP 1* Kitemark cylinder and featuring the most advanced and secure hinge and locking mechanisms as standard, the Ultra Duty door will keep your property secure and withstand the most determined of attacks.

Long-Life Guarantee

Powder coating combined with weather and draught proof seals means a Latham’s steel door is a door for life. It also ensures our security doors can used internally and externally with full peace of mind.

Need it in a Hurry?

All our doors are carried in stock and available for next day delivery via dedicated courier. Perfect for last minute projects or replacement after damage to existing doors.

Upgrades & Accessories

We like to think we’ve thought of everything but all of our steel doors can be customised to perfectly fit your needs which is why we offer genuine parts and accessories.

Also available as a high security steel double door (ultra duty) in sizes from 1295mm-2195mm wide


Available Sizes (mm)

795×2020, 845×2020, 895×2020, 995×2020


White powder coat from stock, choice of colours available


Plain door with flush panel

Door Frame Material

2.0mm Galvanised steel

Door Frame Depth


Door Leaf Material

Double skinned 1.0mm galvanised steel

Door Leaf Depth


Door Leaf Core

Rockwool filling

U Value


Acoustic Value



4 Large stainless steel ball bearing hinges


Hooply handles (5586)

Locks or Door Furniture

Latham's superior multi point locking system


Euro profile cylinder (ABC key system). Security cylinder upgrade available.


Weather / draught proof seals

Dog Bolts

6 Dog Bolts


DDA (Disability Discrimination Act) compliant threshold

Jemmy Bar Lip

At door jam, hinge side & top. Superior ‘barb-like’ design


Fully welded construction

Security Type


CE Certification


Fire Rating Certification


Stock Product


Made to Measure Product


External or Internal Use

Suitable for external and internal use

Example Door Purposes

Security garage side door, security rear shop door, warehouse security door, office security door, acoustic studio security door


Ultra Door Promo Video:

Installation Video:


How do I choose the hinge side and opening? (Handing)

Hinge side and opening is determined viewed from outside.
Example 1: LH hinge open out: hinges are on the LH side, handle is on the right and you pull the door towards you.
Example 2: RH hinge open in: hinges are on the RH side, handle is on the left and you push the door away from you.
See our handy illustration here

What is the lead time?

Stock Door (white, no modifications) – in stock – 0 days
Stock Door (white, modified e.g. installed accessories, vision panel e.t.c) – 4 working days
Re-Powder Coated Stock Door, with or without accessories installed (not white) – 10 working days
Fast track options are also available 

How many keys come with the door?

Personnel doors come with 5 usable keys. Upgraded cylinders come with 3 keys.
Additional keys are available – we have a key cutting machine on-site
See our free issue ABC cylinder explanation video here
See our cylinder options video here

How much do the steel doors weigh?

Budget doors weigh on average 40kg*
Security doors weigh on average 85kg*
High Security (Ultra) doors weigh on average 100kg*
Double doors weigh on average 110kg*
*size dependant

What are the door sizes? What is the clear opening?

The sizes listed are external frame sizes.
We offer side panels and over panels if you need to add to the width or height of the door. We also offer a cut down service to reduce the height of the door
To calculate the clear opening (when the door is open), subtract 135mm from the width dimension. E.G. 895mm-135mm=760mm clear opening
See the video on how to measure here

What is Security Trim?

The security trim kit fits around the perimeter of the door frame, preventing any packing from being seen externally and making the door as a whole more secure.
It hides un-level or large gaps, hides the position of fixings eliminating the risk of tampering from intruders and crucially protects the fixings from attack.
See the security trim video here

To see all FAQs, click here



Download the brochure for our High Security Steel Door (Ultra Duty)

Fitting Instruction

Download the fitting instructions for our doors

Operation & Maintenance Manual

Download the operation & maintenance manual for our doors

CAD Drawing (PDF)

Download the CAD drawing for our High Security Steel Door (Ultra Duty)

CAD Drawing (DWG)

Download the CAD drawing for our High Security Steel Door (Ultra Duty) in DWG

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