Bespoke Windows & Doors
Windows
Steel w20 bespoke grey windows and doors
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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.
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.
Popular Colours
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
Selected: Traffic Grey
Selected: Agate Grey
Selected: Light Grey
Selected: White
Selected: Pastel Green
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.
Downloads
We understand you may have queries about our products and services. We’ve answered some of the most common questions below.
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.
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.
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.
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.
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.
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 ExpertThe 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.
Contact UsCrittall 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.
Contact UsCrittall 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.
Contact UsTransform your home by finding your local Crittall approved installer. Our specialist partners offer a stress-free service from enquiry to after-sales support.