Exterior perspective looking through wide, multi-paned Crittall® Corporate MW40 Steel Doors, revealing a sophisticated, dimly lit hotel lounge with a blue velvet sofa and a collection of unique lamps.

Crittall® Corporate MW40 Steel Doors

Crittall® Corporate MW40 Steel Doors bring together slender steel profiles, larger panes of glass and genuine Crittall craftsmanship in one high performing door system. Developed as an expansion of the celebrated Corporate W20 range, Corporate MW40 doors accept double or triple glazed units up to 32mm thick, giving specifiers a steel entrance door with real substance without sacrificing the narrow sightlines steel is known for.

Available in vertical pivot, horizontal pivot, single and double door configurations, Crittall MW40 doors suit everything from grand corporate entrances to more considered internal steel doors within a wider glazing scheme. Hot dip galvanised and finished in Duralife polyester powder coating, each steel door is built to withstand daily use while requiring minimal upkeep.

As a specialist supplier of steel doors UK wide since 1935, Lightfoot Windows manages every Crittall MW40 doors project from initial specification through to survey, manufacture and installation, for heritage refurbishments, industrial style interiors and ambitious new builds alike.

Corporate MW40 Door Benefits

The features that set the Corporate MW40 range apart for performance driven projects.

Larger Glazing

Accepts double or triple glazed units up to 32mm, twice the glass thickness of standard W20 doors.

Superior Weather Performance

Pressure equalised with double weatherstripping for enhanced resistance to air, wind and water.

Flexible Configurations

Vertical pivot, horizontal pivot, single and double door options to suit any opening.

Bespoke Finishes

Hot dip galvanised and Duralife powder coated in any RAL or BS colour, including black steel.

A wide, eye-level photograph of a luxurious hotel entrance featuring extensive Crittall® Corporate MW40 Steel Doors and a large matching curved glass facade, framed by stone cladding and potted topiaries under a starry canopy.

What Is the Crittall Corporate MW40 Door Range

Corporate MW40 is Crittall’s high performance steel door and window system, developed to replicate the classic Corporate W20 profile while allowing significantly thicker glass to be specified. The result is a door that keeps the slim sightlines Crittall is known for, while offering a step up in thermal and acoustic performance suited to demanding commercial and residential projects alike.

Greater Glazing and Acoustic Performance

By accepting double or triple glazed units up to 32mm thick, MW40 doors deliver a meaningful improvement in heat retention and sound attenuation over standard steel doors. Each door is pressure equalised and fitted with double weatherstripping, offering superior resistance to air, wind and water. This makes the range a strong choice for busy or exposed locations, including projects near transport corridors, where reducing external noise while retaining an authentic steel aesthetic is a priority.

High-angle view of black Crittall® Corporate MW40 Steel Doors installed in a bright, industrial-style room. These slim-profile steel doors maximize natural light and demonstrate the sleek architectural aesthetic discussed in the page content.
Industrial lobby interior showcasing large-scale Crittall® Corporate MW40 steel doors and matching multi-pane black metal windows set against exposed red brick pillars.

Built to Last: Galvanised Steel and Duralife Coating

Every Corporate MW40 door is hot dip galvanised before being finished in Crittall’s in house Duralife polyester powder coating, providing long term protection against corrosion with minimal maintenance. This durability, combined with the inherent strength of steel profiles, gives the range a life expectancy that few alternative materials can match.

Configurations to Suit Every Opening

The Corporate MW40 door range offers vertical pivot, horizontal pivot, single door and double door configurations, giving architects and homeowners the flexibility to specify exactly the right solution for their opening. Door frames are matched precisely to companion MW40 windows, allowing a consistent, considered look across an entire elevation.

Modern executive rooftop lounge showcasing a continuous wall of black, slim-profile Crittall® Corporate MW40 Steel Doors, with one pair open to a city view terrace.
Modern commercial building facade featuring large glass windows and Crittall® Corporate MW40 steel doors with long vertical metal handles.

Ideal for Heritage and Contemporary Projects

The stepped profile of the Corporate MW40 range is particularly evocative of early twentieth century steel fenestration, making it a natural fit for heritage refurbishments and conservation area projects. Equally, its clean lines and slim sightlines suit ambitious contemporary new builds, giving specifiers a single system that performs across a broad range of architectural styles.

Supplied and Installed by Lightfoot Windows Since 1935

As a specialist Crittall partner with decades of experience, Lightfoot Windows manages every stage of a Corporate MW40 door project, from initial design consultation and site survey through to manufacture and installation. Our team works closely with architects, designers and homeowners to ensure each door is specified correctly and finished to the highest standard.

Interior view of the Herbal House lobby showing tall Crittall® Corporate MW40 steel doors open to the street, flanked by exposed brick pillars.

Configured to Suit Your Project

Corporate MW40 doors pair contemporary performance with a classic steel aesthetic. Double glazing delivers strong insulation, slim sightlines keep rooms filled with natural light, and a choice of vertical pivot, horizontal pivot, single and double door configurations means there is a fit for almost any opening.
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A Colour to Suit Your Property or Project

Corporate MW40 doors are available in a wide range of RAL and BS colours, including our iconic black steel finish. Whether you are after something subtle, bold or vibrant, there is a shade to match your vision. Get in touch with the Lightfoot Windows team for more information.

Black

Black

Traffic Grey

Traffic Grey

Agate Grey

Agate Grey

Light Grey

Light Grey

White

White

Pastel Green

Pastel Green

Hardware

Hardware

We offer a wide range of high-quality steel windows and doors hardware options. Our partnership with Frank Allart, makers of fine English hardware since 1914, gives you access to genuine craftsmanship and considered design.

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Crittall Corporate MW40 Doors FAQs

Here are answers to the questions we are asked most often about the Corporate MW40 door range, to help you specify with confidence.

What is the difference between Crittall MW40 and Crittall W20 doors?

Corporate MW40 was developed as an expansion of the Corporate W20 range. It replicates the same slim sightlines and opening configurations but is engineered to accept glass up to twice the thickness, allowing double or triple glazed units for enhanced thermal and acoustic performance.

How thick can the glazing be in Crittall MW40 doors?

MW40 doors can accommodate double or triple glazed insulating units up to 32mm thick, giving noticeably higher thermal and sound insulation than the standard W20 profile while keeping the same authentic steel appearance.

What configurations are available for Crittall MW40 doors?

The range includes vertical pivot, horizontal pivot, single door and double door configurations, allowing designers to match the door to the scale and function of the opening.

Are Crittall MW40 doors suitable for heritage buildings?

Yes. The stepped profile is designed to echo traditional early twentieth century steel fenestration, making MW40 doors a sympathetic choice for heritage refurbishments, as well as an eye catching option for contemporary new builds.

What colours and finishes are available for MW40 doors?

MW40 doors are hot dip galvanised and finished in Duralife polyester powder coating, available in a wide range of RAL and BS colours, including the iconic black steel finish associated with Crittall products.

How much do Crittall MW40 doors cost?

Pricing depends on your specific configuration, glazing specification and project requirements. Speak to the Lightfoot Windows team for a personalised quotation based on your design.

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