Cost vs quality: Why developers choose W20 TE for premium builds 

• 3 June 2025
• News

Balancing cost with performance is a constant consideration in construction. For experienced developers, the decision is not simply about today’s outlay, but tomorrow’s reputation. And when it comes to steel windows, most would agree: it is an investment best made once, and made well. 

Steel windows and doors may not be the first detail to catch the eye, but they are certainly among the last to be forgotten. The impressive slim sightlines. The inherent strength of steel profiles. The unmistakable sense of quality with every open and close. In high-spec residential and commercial projects, these are the details that matter. 

This is why the W20 TE system from Crittall Windows is fast becoming the steel system of choice for developers who demand both timeless design and outstanding modern performance. 

W20 TE: combining tradition with exceptional energy efficiency

Crittall’s W20 TE offers a unique combination: the timeless design and traditional feel of original Crittall windows, re-engineered for modern performance. With a U-value of 1.4 W/m²K, this robust rolled steel system complies fully with Approved Document L, providing exceptional energy efficiency while preserving the aesthetic appeal of heritage fenestration. 

Thanks to dual weather seals, hot-dip galvanised steel construction and the durable Duralife® finish, these beautiful steel windows are designed to endure everyday use with ease, all while delivering consistent performance across thermal gradient extremes. From internal openings to external windows, the system ensures the highest quality standards. 

A natural fit for conservation areas and contemporary schemes alike

W20 TE is an ideal choice for projects in conservation areas or those involving listed buildings. With the ability to replicate original sightlines and finishes, developers can satisfy planning constraints without compromising on performance or aesthetic cohesion. 

As suited to the Art Deco era as to the contemporary age, these windows offer a level of design flexibility rarely found in high-performance fenestration. From kitchen patio doors to internal doors and new internal windows, the W20 TE delivers a cohesive look across various applications. 

Designed, engineered and manufactured in the UK

Every Crittall W20 TE unit is made in Britain using CNC-engineered components, galvanised steel and high-precision manufacturing processes refined by decades of experience. As a leading manufacturer of steel windows and doors, Crittall provides flexible installation options, shorter lead times and expert advice from initial visit to final fitting. 

Choose from a wide range of colours, glazing options and ironmongery designs and finishes – from the iconic black steel to various finishes that suit any architectural vision. Whether specifying for a residential project or working closely with a building contractor, this system supports your design intent and enhances the overall look of the house. 

Where performance meets pleasure

For developers seeking the best experiences in premium window and door systems, W20 TE brings a touch of classic elegance with very high quality and outstanding energy efficiency. This is steel engineered not only for thermal performance and inherent strength, but also for sheer pleasure in everyday use. 

So if you’re ready to specify new Crittall windows, or replace original Crittall windows with products that meet today’s demands without sacrificing yesterday’s charm, W20 TE is the perfect Crittall supplier choice. 

Start your next development with a system trusted by architects, planners and design engineers alike. Contact Crittall for expert guidance on future products.