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Case study 2026 / Q2

A made-to-measure arched front door, manufactured in Luton for a London home

A made-to-measure arched front door, manufactured in Luton for a London home

Sector

Residential

Location

London

Certification

PAS 24

Lead time

2 weeks

Year

2025

Product

Bespoke arched steel door

Customer brand

Fort Premium

Manufactured at

Luton, UK

– 01 / 04 The brief

The opening wasn’t standard. Off-the-shelf wasn’t an option.

An arched head, an unusually tall single leaf, and an existing brick reveal that wouldn’t take a stock door. The homeowner wanted a front door that read as a piece of joinery from the inside and the outside, not as a security product, while still meeting PAS 24.

The brief came in through Fort Premium. Three things had to line up:


  1. 01


    Match the existing arched opening exactly. No packing, no infill panels, no compromise on the reveal.



  2. 02


    Pass PAS 24 with a single-leaf door this tall and this shape.



  3. 03


    Finish to the homeowner’s chosen paint colour for the rest of the entrance.


– 02 / 04 In the factory

The arch is the part that takes the time.

Every measurement taken from the opening itself, not from a drawing. The arched head set out, cut, and welded as a single rigid frame before the leaf was built into it.

Ribbed Reinforcement Before Skinning

Stage 01

Welded steel frame – arched head set out

Steel Skeleton With Welded Arched Head Frame Assembly Stage

Stage 02

Ribbed reinforcement – pre-skin

Ribbed Vertical Reinforcement Set Into The Welded Perimeter Pre Skin

Stage 03

Perforated core – PRIMING

– 03 / 04 The build

A single-leaf arched steel front door, fabricated from scratch at the Luton factory.

Two finished configurations from the same engineering: a full-height single leaf and a stable-style split door. Both built around the same arched profile.


  1. 01


    Bespoke arched head – profile cut to a template taken from the opening.



  2. 02


    Welded steel perimeter frame with internal ribbed reinforcement running vertically through the leaf.



  3. 03


    Perforated steel core sheet for stiffness without unnecessary weight.



  4. 04


    Multi-point locking, concealed hinges, all hardware specified to PAS 24.



  5. 05


    Factory-applied paint finish to the homeowner’s chosen colour.



  6. 06


    Hung and tested at the factory before it left Luton. Arrived on site as one unit ready to install.


Installed Arched Security Door In London By Fort Engineering
Arched Steel Front Door, Exterior View London Residence

– 04 / 04 Outcome

The door installed straight into the existing arched opening without alteration to the brickwork. PAS 24 certified. Finished to specification.

2

Weeks lead time

PAS 24

Certification met

0

Brickwork alterations

Want one for your home?

Fort Engineering doesn’t sell direct. This door was fulfilled by Fort Premium, the residential customer brand for Fort-manufactured doors.

If you’re a homeowner with a non-standard opening – arched, oversized, or an awkward brick reveal – that’s the right route in.