Steel windows are often specified as the preferred fenestration solution for architecture that is important, valuable or of high conservation value.

Clement’s approach is to work in partnership with architects and other building professionals to help produce specifications that are visually stunning and offer high technical performance, while respecting and enhancing important heritage and conservation objectives.

Arrangements for Listed Buildings or those in Conservation Areas can replicate existing steel fenestration, while improving thermal performance and security. Specifications for new build projects make the most of steel’s strength to produce slender frames with elegant sight lines which are incomparable to other supposedly similar materials such as aluminum. Steel also enables us to produce highly secure window systems which feature multi point locking and where appropriate we can offer architectural windows that achieve the BS 7950 security standard.

Clement manufactures Jansen cold formed steel profiles which offer slender window frames with the added benefits of thermal insulation and extra security. We offer steel doors and screens fitted with fire resistant glass and our Product Development team has recently successfully tested a new Clement fire screen and single door.

Find out more about our architectural steel windows, doors and screens and conservation rooflights

You can view our case studies here and take a look at our photo gallery here

Our NBS Source profile is here and if you are interested in our RIBA Approved CPD Seminar, there is more information here.

If you are looking for technical advice and support for your fenestration project, please visit our Technical page here or contact us for more information.


Clement Steel Windows


New or replacement steel windows are not only visually stunning with their slim and elegant sightlines, they also result in lower energy bills, greater security and a reduction in noise. Clement offers a broad range of windows to suit every purpose. We specialise in the replication of existing windows while respecting and enhancing important heritage and conservation objectives.

Clement Windows Steel Doors & Screens


Clement's steel doors and screens are made from slim steel sections. Offered with multi point locking or a traditional mortice lock, they come in a range of colours to match your interior design or to create a unique look. Safety glass is standard and a number of glazing options are offered for fireproofing, security and to meet solar and acoustic requirements.

Clement Windows Conservation Rooflights


The Clement Conservation Rooflight is a modern reproduction of a Victorian original, manufactured for a range of heritage projects. Available in eight standard sizes for a tile or a slate profile, when your rooflight is installed it will lie flush with the roof line. If one of our standard sizes does not fit, we also manufacture bespoke sizes.


Find, select and specify Clement Windows Group with NBS Source

Find, select and specify Clement Windows Group with NBS Source

Clement’s profile on NBS Source provides a one stop shop for specifiers looking for technical product information, certificates and case studies related to our steel windows doors, screens and conservation rooflights. Read more...


Case Study: Landmark Art Deco building in Malta fitted with new Clement steel windows

Case Study: Landmark Art Deco building in Malta fitted with new Clement steel windows

The Brewhouse, formerly known as Farsons Brewery was one of the first and finest examples of concrete-reinforced Art Deco buildings on the island of Malta. The building was founded and designed by Lewis V Farrugia and William Binnie and originally opened 73 years ago in June 1950. Read more...


Beautiful new Brooking leaded light steel windows for family home

The owners of this attractive, spacious home have recently refurbished and added a kitchen extension. Being situated within a London Conservation Area, it was vital that any new fenestration matched the existing. Read more...

Clement Windows Brochures


We hope you find all the information you are looking for, but if you still have a question, please feel free to get in touch, or you can make an appointment to see our showroom and experience our steel windows, doors and screens first hand.