Design Without Limits: Customising W20 TE for Different Architectural Styles

• 12 May 2025
• News

In the world of fenestration, few products offer the perfect balance of heritage aesthetics and modern performance like Crittall W20 TE steel windows.

With a legacy spanning over 175 years, Crittall has refined the art of steel window manufacturing. At Crittall Windows, our steel systems complement virtually any architectural style – from contemporary industrial-chic to refined Victorian elegance – while meeting contemporary performance demands.

One of our most popular window systems, W20 TE is a versatile, high-quality steel window system that architects and designers can customise to suit projects ranging from period restorations to cutting-edge contemporary designs.

W20 TE: a great choice for diverse architectural projects

Custom steel windows are an excellent choice for both residential and commercial applications thanks to the system’s blend of style and strength.

Whether specifying for an Art Deco renovation or a sleek new build, the W20 TE system provides the design flexibility architects need while maintaining the distinctive aesthetic appeal that has made Crittall windows iconic for generations.

Why Choose W20 TE?

Whether you’re an architect, housing developer or trade professional, there are multiple reasons to choose Crittall W20 TE windows.

The system delivers advanced performance and excellent  energy efficiency, with impressive U- values of 1.4 W/m²K, ensuring full compliance with Approved Document L while maintaining the slender profiles that define the Crittall aesthetic.

Unlike standard options, the W20 TE features dual weather seals that provide superior protection against the elements, making it suitable for even the most challenging environments. This makes it an idea choice for projects in exposed areas, or those where durability is crucial.

The inherent strength of Crittall steel profiles allows for minimal sight lines without compromising on structural integrity. This fundamental quality makes custom steel windows W20 TE ideal for creating light-filled interiors and maximising views in both heritage and contemporary projects.

Manufactured from 100% recycled high-quality steel, these windows combine sustainability and outstanding performance with remarkable durability—boasting a life expectancy exceeding 60 years.

What’s the difference between W20 and W20 TE?

Both the W20 and W20 TE systems deliver Crittall’s renowned quality and elegant aesthetics. The W20 TE builds on the foundation of the W20 by adapting the frame to  improve thermal  performance for projects where energy efficiency is a priority without compromising the iconic slim sightlines.

Custom steel windows W20 TE: Customisation options

The W20 TE system’s impressive versatility stems from its wide range of customisation options. Whether you’re looking to replicate art deco era aesthetics for a residential project or create a striking modern statement for a commercial centre our steel windows offer great versatility.

Bespoke sizing

Like all of our Crittall windows and doors, the W20 TE rolled steel system can be specified in numerous configurations, sizes and designs. As well as fixed windows, a variety of opening configurations are available.

This variety of design styles allows architects and designers to achieve their vision while maintaining the distinctive character of steel fenestration. Whether creating a large expanse of steel-framed glazing or smaller feature windows, the W20 TE system is adaptable to suit any requirement.

Range of colours

While many associate Crittall with the iconic black steel finish, the W20 TE system can be finished in any RAL, BS,  bespoke colour or textured coating. This allows architects to adapt steel windows to suit their overall design concept or to create striking contrast elements.

Popular finishes include:

• Traditional black for authentic period aesthetics
• Anthracite grey for contemporary schemes
• White for classical settings or heritage builds
• Custom colours to match brand identities or commercial schemes

All finishes are applied after galvanising, ensuring long-lasting protection against corrosion and minimal maintenance requirements.

Hardware range

The perfect steel window deserves complementary hardware. Crittall offers both Classic Collection and Luxury Collection options to complete your W20 TE specification.

The Classic Collection features traditional and versatile designs that are perfect for a variety of installations, while the Luxury Collection offers premium fittings for projects requiring sophisticated, contemporary style.

Hardware options include handles and stays, all designed to complement the overall look of your project while providing secure operation.

Customising W20 TE for different applications

How can Crittall steel windows be used for different architectural styles? Below we’ve compiled a few design suggestion for using Crittall windows in your project, but the possibilities are endless! The beauty of bespoke steel windows is that they can be adapted to suit virtually any stylistic requirements.

Period properties

For heritage buildings, W20 TE offers the ability to replicate original Crittall windows while providing modern thermal performance. Details such as authentic glazing bars and traditional hardware can be specified to complement heritage—style schemes while improving energy efficiency.

Contemporary residential

In modern homes, W20 TE adds a touch of classic elegance through clean lines and industrial character. Larger panes with minimal framing maximise natural light, creating bright, welcoming spaces. W20 TE steel doors can be specified to complement the windows, and utilising dark colours like black or anthracite creates lighter against lighter wall surfaces, contributing to the contemporary feel of your space.

Commercial projects

W20 TE excels in commercial settings where performance and longevity are essential. The system’s robust design makes it a perfect addition to offices, education facilities, and retail environments. The inherent strength of Crittall steel profiles allows for expansive glazed areas that fill interior spaces with natural light while maintaining excellent security.

The perfect choice for your project

With its combination of design flexibility and thermal efficiency, the W20 TE system is the perfect choice for architects seeking custom window solutions. Choosing custom steel windows W20 TE means selecting products with a life expectancy far exceeding alternative materials. The investment delivers long-term value through durability, timeless design, and energy savings.

Whether your project demands the highest quality steel windows for a sympathetic period renovation or modern performance in a contemporary context, the W20 TE system offers the adaptability to achieve your vision.

Discuss your project with experts today: contact Crittall

Ready to incorporate the timeless elegance of Crittall W20 TE into your next project?

Contact our team today to discuss your requirements. Complete our online contact form, call 01376 530 800 or email hq@crittall-windows.co.uk for a free, no-obligation quote.