Steelshield External Steel Door

High-spec security & thermal performance – built for trade professionals.

The Steelshield is a sturdy, CE-marked external steel door designed specifically for commercial and industrial environments where security, energy efficiency, and compliance are essential. *Fully certified to EN 14351-1 for external use and this door delivers dependable performance without compromise.

With a low U-value of 1.6 w/m2k, and ongoing R&D targeting improvements to <1.0 W/m²K, the Steelshield supports enhanced energy efficiency for both new-build and retrofit projects. This makes it ideal for energy-conscious applications including plant rooms, utility areas, commercial buildings, and secure access points. The Steelshield is also available as a fire rated door, the Steelshield FR.

Key Features

Personal access

Means of escape

Door leaf thickness 55mm bonded

Flush astragle sheet thickness 1.2/1,5mm

Thermal transmittence (U Value) 1.6 w/m2k

Ability to release BSEN 1125 or 179

Steelshield Security Door

The Steelshield is a robust and reliable steel security door designed to keep your property safe. It’s a great choice for protecting any external access point, whether it’s for staff entry or a Means of Escape door.

Extra-strong build

The door is made from 1.2mm thick steel (with an even tougher 1.5mm option), while the frame is 1.5mm thick for maximum durability. The door leaf is 55mm thick and has a twin-skinned, non-welded design.

Certified protection

It’s CE marked to meet European safety standards (EN 1451-1), so you can be confident it’s built to last and provides reliable security.

Enhanced security

With 12mm-diameter security bolts between each hinge, this door provides an extra layer of protection against forced entry.

Insulated core

The standard insulated mineral fibre core helps improve energy efficiency, keeping heat in with a U-value of 1.6 w/m2k. A solid timber core is also available as an option.

Customisable

You can choose to add solid, louvred, or glazed over-panels and side-panels to suit your specific needs and design preferences.

Corrosion-resistant finish

Both the door and the frame are made from galvanised steel, which is ready to be painted with a PPC finish for superior resistance to rust and corrosion.

Finish

The Steelshield door features a highly durable, in-house applied external polyester powder coat finish. You can select your colour from the full RAL or BS4800 colour range.

This premium finish is backed by a 7-year warranty*, assuring its long-term adhesion and colour stability.

*Valid for C3 non-marine environments.

Door furniture and locking

Your doors will be fitted with the Arrone 800 Series DIN standard mortice lock range, providing comprehensive security options including:

  • Sashlock, Deadlock, and Latch
  • Nightlatch
  • Toilet Lock.
  • Escape Sashlock

All locks are paired with a Level Handle Set featuring 19mm stainless steel round bar levers that are bolt-through for superior strength (tested to Grade 3 BS EN 1906), along with a matching stainless steel security escutcheon.

Hinges and closing devices

The door assembly is supported by four Arrone 8782 stainless steel lift-off hinges (Class 14 to BS EN 1935), each equipped with a 15mm security bolt for enhanced tamper protection. Door closing is controlled by an ASSA 200/300 Surface Mounted Door Closer with a sleek silver trim plate.

Door bottom edge

A specialised U-profile is included at the door’s bottom edge, ready to easily accommodate either an automatic drop seal or a concealed floor sweep (available as options).

Profile cylinders

We supply the profile cylinders in your choice of configuration: Cylinder & Turn, Double Cylinder, or Single Cylinder. Multiple doors are supplied with a standard differ (unique keys) but a Master Key System is available upon request for unified access control.

Means of escape devices

We provide hardware compliant with all necessary safety standards:

  • Panic Exit Devices (BS EN 1125 Compliant): Briton 300 series options include the 376 two-point bolt and 378 single-point latch, both with a 1413 Lever or Knob for outside key access.
  • Emergency Exit Devices (BS EN 179 Compliant): Briton 300 series options include the 372 two-point panic pad and 1438 single-point panic pad.
  • Standard escape devices include the Arrone DIN standard mortice escape sashlock with a lever handle.

Vision Panels

Enhance natural light and visibility without compromising thermal efficiency or security. Our vision panels feature a robust two-part screw-together design and are glazed with a high-performance 18mm double-glazed unit (DGU).

Vision panels are available in a range of sizes from 254 x 559 to 254 x 1219. We also offer bespoke options.

Find out more in the Data Sheet.

Louvred Panels

For applications requiring ventilation and airflow without visual access, select our durable louvered panels. These are supplied as a two-part screw-together non-vision unit, designed to seamlessly integrate with the door’s structure.

Louvered panels are available in a range of sizes from 457 x 457 to 457 x 1524. We also offer bespoke louvered panel options.

Find out more in the Data Sheet.

Door frame options

Steel shield external doors come with a choice of frames to suit the widest possible structural doorway constructions.

As standard they come with the rapid fit “jacking screw” arrangement and adjustable sub frame channels that allow our doors to have the correct tolerance. This ensures simple installation, whilst expanding to fill the structural opening and leaving a neat joint ready for mastic to be applied.

As well as these standard design solutions our manufacturing and design facilities can deliver custom frames to suit any structural opening detail you need to install our doors into.

Standard frame

The standard Steelshield frame is designed for high durability, excellent corrosion resistance, and simple, secure installation across various structural openings.

It is highly versatile and can be securely fitted into a wide range of wall constructions, including:

Brickwork / concrete
Gas concrete
Prefabricated walls
Composite panel
Steel work

For more detailed information, view the Data Sheet.

Threshold Options

Click here for our threshold options data sheet.

 

Dimensions

Our panels are sized to fit various configurations, but please note, any panels exceeding 1350mm in height will feature a central split.

Please see full dimension information in our data Sheet.

 

Steelshield Data Sheets

Steelshield External Door Standard Frame Options

Steelshield External Door Standard Louver Panel Options

Steelshield External Door Threshold Options

Steelshield External Door Vision Panel Options

Steelshield External Door

Get in touch

To request a quote, or for further information regarding one of our products, contact us today and our friendly-experienced team will be happy to help.