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Want only the best for your home? Our cutting-edge range of thermal break aluminium windows are exactly what you’ve been looking for. Combining stunning looks with impressive thermal efficiency and unparalleled durability, these windows really are the best of the best.
Whether you’re planning to modernise your property or are trying to maintain a period look while incorporating the latest technology, our range really does have something for everyone. A variety of designs and finishes are available to choose from, including powder-coated finishes in hundreds of different RAL shades.
As one of the UK’s leading specialist installers of aluminium windows and doors, our team has the know-how to supply and install them efficiently and to a high standard: we won’t settle for anything less than a flawless finish.
What’s more, each installation we carry out comes with a complimentary 10-year warranty. So, if you’re looking for a company you can count on – not just now, but in the years to come – look no further than Klosen. To find out more, download a brochure or request your free quotation today.
Want the contemporary-yet-timeless look of an aluminium window, but the efficiency of PVC frames? Thermal break aluminium windows are the solution to your dilemma.
Pioneered by the British firm Senior Architectural Systems, this ingenious feature really does give you the best of both worlds. In thermal break windows, polyamide material is sandwiched between the inside and outside of the aluminium frame, creating an insulating ‘barrier’ between both panels. The result? Temperature conductivity is slashed, allowing the window to much more effectively keep heat in and cold out – perfect for keeping energy bills in check.
As an added bonus, your home will be cooler in the summer. Noise from the outdoors will find it harder to make its way inside too, giving you a more peaceful home than ever before. Aluminium thermal break windows are simply the best of the best.
Based on our extensive knowledge and experience, we’ve hand-picked two of the world’s best window suppliers: Cortizo and Senior Architectural Systems. Learn more about each brand below or download a brochure for further information.
We offer a 10 year guarantee on all aluminium profiles and 25 years for the powder coating element
Stay warm in the winter and cool in the summer whilst cutting down on energy bills
Our team are flexible throughout the entire process, including the design and installation of windows
Klosen have over 25 years experience working with designers, architects and homeowners
Cortizo, based in Spain, is a renowned company across the industry. This manufacturer specialises exclusively in aluminium products and is known for its uncompromising approach to aesthetics: you won’t find thinner, more beautiful window frames anywhere else.
Located in the Yorkshire city of Doncaster, Senior Architectural Systems is one of the world’s leading manufacturers of aluminium windows. It earned that reputation by never resting on its laurels and continuing to push the boundaries of what’s possible; the fact that it invented the polyamide thermal break pretty much says it all!
We made it onto an episode of Grand Designs, with a Kevin McCloud-approved home project in South Lincolnshire. We supplied Cortizo casement windows for this impressive Dutch-inspired barn. The contemporary windows on the facade are certainly a standout feature.
Based in Market Deeping, Lincolnshire, we cover towns and cities within a 60-mile radius, including the entirety of Cambridgeshire and Lincolnshire. Areas we regularly visit include Peterborough, Bourne, Stamford, Huntingdon and London.
No, not every manufacturer offers this technology. All of the windows we supply come with it installed, however. We highly recommend choosing thermal break windows for the efficiency benefits they provide.
Yes, significantly so. Aluminium won’t rust, corrode, crack or rot, making it the perfect material for this application.
Any colour you can imagine! Besides standard shades of white, grey and black, our windows are available in hundreds of RAL hues, allowing you to get creative
