Industrial loft-type windows

Jansen steel windows and doors

Jansen’s Steel window range moves steel window and door thermal efficiency, weather sealing and security to a new level while retaining ultra-slim sightlines.

Redefining the thermal performance of steel windows

Jansen has developed an advanced, uyltra thermally efficient steel window system which achieves u-values of as low as 0.8W/m2K, a Passiv Haus equivalent level of performance.

With a range of options specially designed for the renovation of industrial and loft-type windows ultra-slim profiles meet advanced levels of performance.

Design service

We’ll work with you to make your designs and ambitions for your home or self-build project a reality.

Next generation performance

Our window and doors deliver advanced levels of performance, making your home warmer and more secure.

Bespoke manufacture

The doors that we supply are tailored to your home and manufactured to exacting standards making them the perfect fit!

Expert installation

Our fitting teams bring attention to detail and craftmanship to window and door installation. We also apply the same care to your home.

Planning your next home improvement or self-build project?

Get in touch with the team today on 01295 270938

Get up close and personal (with our products!)

Visit our window and door design centre

Windows and doors are a big purchase, so making time to get it right is important. We think there’s no replacement for seeing windows and doors ‘in the flesh’, opening and closing them and picking out the fine detailing that brings the all-important finishing touches to your project.  

With showrooms in Banbury and Beaconsfield, we bring our product ranges closer to you.   

Our Window and Door Design Centre, is located 15 miles north of Oxford in Banbury and carries our complete product range.