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Klosen / Windows


Our windows sit comfortably with the contemporary lifestyle; they are elegant, strong and chic. We ask our customers the right questions to discover what they want and work tirelessly to deliver the best solution.


Aluminium Windows

From outward-opening, side hung, top hung, tilt-and-turn, sliding and sash windows, inward-opening, there are numerous options available. Because every design is bespoke, you can adapt them to suit any space with a wide variety of window types available. With glass that is double-glazed, toughened, 4mm glass, with an option for 6mm glass – and have excellent thermal qualities with a centre pane U Value of 1.1 as standard. Compliant with building regulations, what set them apart are the levels of insulation with smooth operation and draught-proof weather seals that deliver minimal external noise and heat loss. Hundreds of colour choices available, including metallics.

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Slimline Windows

Our contemporary range of slimline windows feature slim sightlines for increased aesthetics, and have been designed to exceed current and meet future building regulations, with impressive U-values and high thermal performance. Able to achieve fantastic U-values as low as 0.95 W/m2K when calculated as a CEN Standard Commercial window. With minimal framing our slimline windows can transform a room by inviting more natural light in and make a fantastic view even more visible. No matter the climate or environment our slimline windows offer elegance, style and practicality consistently throughout the year.

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Klosen Windows

Heritage Windows

Taking inspiration from traditional steel windows, our heritage window system is an aluminium thermally broken system that features slim sightlines and attractive aesthetics. It allows a property to retain the distinctive charm of steel windows, but with the added benefit of aluminium double glazing, which is often more cost effective and thermally efficient. It is an ideal application to listed buildings and refurbishment projects where existing features need to be carefully considered. The natural strength of aluminium allows for large glass areas, with minimal frame. Also available in dual colour allowing a combination of two RAL colours, often used to help match interior furnishings.

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Get in touch with us today to receive your free quotation!

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