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At Clement we are experts in steel window fenestration.

We offer residential clients and building professionals a choice of high quality steel windows, steel doors and screens, tailor-made to your specific requirements, together with a popular collection of conservation rooflights.

We provide a complete service – from the provision of technical drawings through to manufacture, installation and after sales support – whether your project is a traditional restoration project, one involving Listed Buildings or Conservation Areas, or a new build that requires thermally broken steel windows and doors. We specialise in replacement steel windows and doors, yet our products are the solution for most schemes where metal windows and doors are required.

Our previous work includes prestigious steel door and window projects across the UK, Europe and the USA and our range of heritage rooflights, which are available from stock, are popular in several countries worldwide.

We are delighted that so many of our clients come back to us again and again because they know they will not find a better product anywhere else.

Choose Clement Windows and you will enjoy technologically advanced, low maintenance steel doors and windows which will meet the latest performance requirements for insulation, weatherproofing and security and which will last for many years.

All of our new steel windows are sensitively crafted to the highest standards in our own ISO 9001 and ISO14001 approved factory. The process of manufacturing a steel window – from rolling into shape and welding to hot dip galvanising and powder coat painting – is a complex one which takes time and attention, but we believe this is time well spent to ensure the end product is the standard people have come to expect from Clement.


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 replica 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.


Clement sponsor Small Project of the Year (up to £5m) award at the 2023 Building Awards

Clement has once again sponsored the Small Project of the Year (up to £5m) award at the 2023 Building Awards, which was held at the Grosvenor House in London on 7th November. This was the eighth consecutive year Clement has sponsored the award and as always it was a star-studded event... Read more...


Case Study: India Buildings

Case Study: India Buildings

The India Buildings is located on Water Street in the centre of Liverpool’s financial and business district. It was designed by architects Arnold Thornely and Herbert J Rowse, following a competition to design an office block which was judged by the great Sir Giles Gilbert Scott and built between 1924 and 1932 for the Blue Funnel shipping line owned by Alfred Holt. Read more...


Replacement steel windows, doors and screens for picture perfect Arts and Crafts family home

It was a pleasure for all involved to work on this outstanding project, an original Arts and Crafts home which has been impeccably refurbished. The recent works included extending the house, as well as opening up and changing the layout. 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.