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TRADING SINCE 1849

Crafting beautiful steel windows and doors since the reign of Queen Victoria.

HANDCRAFTED TECHNOLOGY

High-quality, hand-crafted products that are designed to last a lifetime.

NATIONWIDE COVERAGE

Discover our exceptional products no matter where you are in the UK.

Steel french doors and windows

Maximising Natural Light in Commercial Workspaces

Light is one of the most significant factors in workplace productivity and occupant wellbeing. Crittall’s steel profiles are inherently stronger than aluminium, which allows for significantly narrower sightlines and larger expanses of glazing. The result is more glass, less frame and substantially more natural light entering the workspace.

For commercial office projects where glazed internal partitions divide open-plan floors into meeting rooms, breakout areas or private offices, our Innervision® internal screen system delivers the slim, industrial aesthetic that contemporary workplace design demands — without compromising the flow of light between spaces.

Compare Crittall® Window Ranges

Find the right window for your project.

  • Case Studies

Our Recent Work

Another angle of the Crittall steel-framed window showing a seamless blend with the surrounding architecture.

Ambitious project in South West London by Bespoke Design Glazing

This case study shines the spotlight on a compelling project that secured a runner-up position...

Modern property exterior featuring black crittall windows and doors with glass balustrade balcony

Restoration in rural Sussex by Lightfoot Windows

This project, executed by our specialist reseller Lightfoot Windows, focused on a listed property in...

Modern property with white facade, featuring crittall steel windows and doors

Modern renovation in South Yorkshire by KJA Services

The Crittall House of the Year (CHOTY) awards celebrate our commitment to excellence by recognising...

Exterior of Adelaide House, an office building in London

Crittall windows that truly stand the test of time

Crittall Windows recently returned to Adelaide House in London to replace the steel windows it...

Black steel french internal doors

Crittall House of the Year Award Winner 2023

Congratulations to the deserving winners of this year's Crittall House of the Year Award with...

Full installation of light grey steel bespoke windows, casement windows, and french doors

Crittall House of the Year Award – Runner Up 2023

When the owners were planning the renovation of their house, they knew they wanted to...

Design Flexibility

Tailor your vision with a range of colours, hardware finishes, and window configurations. Explore our downloadable resources to find inspiration and technical specifications to bring your design to life.

  • Hardware
  • Downloads

Popular Colours

Black
Traffic Grey
Agate Grey
Light Grey
White
Pastel Green

A colour to suit your home

Our steel windows are available in a wide range of bespoke colours, including our signature black steel. We take pride in providing high quality windows that are coated with Duralife Polyester powder, guaranteeing a consistent and durable finish. With so many options available, you're sure to find the perfect match for your property or project.

Selected: Black

Black

Selected: Traffic Grey

Traffic Grey

Selected: Agate Grey

Agate Grey

Selected: Light Grey

Light Grey

Selected: White

White

Selected: Pastel Green

Pastel Green

Hardware

Hardware

We offer a wide range of high-quality window and door hardware options. Our partnership with Frank Allart, makers of fine English hardware since 1914, ensures that you have access to the best in craftsmanship and design.

Soho Casement Handle

Soho Casement Handle

Phoenix Casement Handle

Phoenix Casement Handle

Deco Casement Handle

Deco Casement Handle

Berkeley Casement Handle

Berkeley Casement Handle

Arched Casement Handle

Arched Casement Handle

Straight Casement Handle

Straight Casement Handle

Scroll Casement Handle

Scroll Casement Handle

Curved Casement Handle

Curved Casement Handle

Sliding Stay With Round Knob

Sliding Stay With Round Knob

Sliding Stay With Butterfly

Sliding Stay With Butterfly

Straight Peg Stay

Straight Peg Stay

Curved Peg Stay

Curved Peg Stay

Single Folding Opener

Single Folding Opener

Downloads

Frequently Asked Questions

We understand you may have queries about our products and services. We’ve answered some of the most common questions below.

Are Crittall steel partitions suitable for open-plan commercial office environments?

Yes. The Innervision® internal screen and door system is specifically suited to open-plan commercial office environments. It creates defined spatial zones — meeting rooms, breakout spaces, private offices — while maintaining visual connectivity and natural light flow across the floor plate. Screens are available in single and double configurations with fixed panel, hinged and sliding door options to suit any office layout.

Can Crittall internal screens meet fire rating requirements for commercial office projects?

Yes. Crittall's Innervision® Fire Rated door system achieves an FD30 fire rating, making it compliant for use in commercial office environments where fire separation between spaces is required. The fire-rated system maintains the same slim steel profile and glazed aesthetic as the standard Innervision® range, ensuring no compromise on design intent.

Do Crittall external windows comply with Part L Building Regulations for commercial buildings?

Yes. Crittall's thermally enhanced W20 TE® system is designed to meet current UK Building Regulations Part L requirements for commercial buildings. The system incorporates integrated thermal break technology to achieve low U-values without increasing the profile width, meaning energy performance compliance is achieved alongside the slim sightlines required by the specification.

What acoustic performance options are available for office partitions?

Crittall's Innervision® internal screen system is available with acoustic glazing options, providing sound reduction between spaces within an office environment. This is particularly relevant for meeting rooms, private offices and areas requiring speech privacy from open-plan working areas. Our specification team can advise on the correct glazing specification to meet your acoustic performance targets.

Can Crittall products be specified for both Cat A and Cat B commercial office fit-outs?

Yes. Crittall products are appropriate for both Cat A and Cat B commercial office specifications. External windows and curtain wall interfaces are relevant at Cat A stage, while internal Innervision® screens, partitions and doors are typically specified and installed during Cat B fit-out. Our team can support both stages of specification with relevant technical documentation.

Are Crittall steel windows and doors suitable for office refurbishment projects as well as new builds?

Yes. Crittall has extensive experience supplying steel windows and doors for commercial office refurbishment projects across the UK. Our products can be manufactured to match existing opening sizes and configurations, and our T60 range is particularly suited to refurbishment projects in historic or architecturally significant office buildings where like-for-like replacement is required.

Can’t find the answer you’re looking for?

Speak to an Expert

Internal Partitions & Screens for Office Fit-Outs

The Innervision® range is increasingly specified by architects and interior designers for commercial office interiors. Glazed steel partitions create clear spatial zones within open-plan environments while maintaining visual connectivity and natural light penetration throughout the floor plate.

Available in single and double configurations, fixed panels and sliding door systems, Innervision® screens can be tailored precisely to the layout and programme requirements of any office project. Finish options include any RAL or BS colour, with a range of glazing choices from clear to frosted and reeded glass for privacy where required.

For projects requiring fire-rated separation, Our Innervision FR door systems achieve FD30 fire resistance in accordance with BS EN 1634, offering 30 minutes of protection. Options include single or double leaves, vision panels, and certified hardware including panic bars and electromagnetic locks compatible with modern alarm and BMS integrations.

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Steel MW40 windows interior

External Steel Windows & Doors for Office Buildings

Crittall provides full technical support for commercial office specifications, including NBS clauses, CAD drawings, data sheets and 3D ISO renders. Our specification team works directly with architects, project managers and main contractors from RIBA Stage 2 through to construction.

All products are manufactured in Britain and carry Made in Britain, FENSA and CHAS accreditations, supporting procurement requirements across both private and public sector commercial office projects.

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Start Your Commercial Office Specification

Crittall recognises the importance of ongoing learning and professional development for architects and designers. A series of RIBA-approved CPD modules has been created to expand existing knowledge and skills, providing a deeper understanding of how steel windows and doors can enhance both the aesthetics and performance of diverse architectural projects, from restoration to new build designs.

Contact the Crittall team to discuss your office project, request a specification pack or locate your nearest approved Crittall Specialist Partner.

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Black internal steel doors
Trio of french doors for London home

Start your Crittall journey

Transform your home by finding your local Crittall approved installer. Our specialist partners offer a stress-free service from enquiry to after-sales support.






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    Customer Reviews

    Take a look at some of our customer reviews to see how Crittall windows and doors have transformed real-world spaces. Customer reviews offer valuable insights beyond aesthetics, providing details on installation experiences, long-term performance, and the overall impact Crittall's windows and doors had on their projects.

    The Crittall design meant we could retain a traditional feel which would fit with the overall look of the house.

    KAREN WELSTEAD

    Scotland, UK

    All of our visitors comment on our stunning doors and we all love the beautiful shadows in the kitchen created by the frames – its like a cobweb of shadows!

    HANNAH

    SW London, UK

    ‘Nothing shouts 1930’s elegance like original Crittall windows … We feel as though we are on the set of a Poirot shoot when we walk inside’

    HARRY & VIC

    Lake District, UK

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