Search over 1000 windows on SpecifiedBy, from leading Windows manufacturers including; Olsen Windows & Doors, Aluk and NorDan UK.

You can refine your search further by sub-categories of Windows, such as Casement Windows, Vertical Sliding Windows and Tilt & Turn.

Important criteria to consider when specifying Windows include; Features, Colours and Certifications.

Premium Aluminium Windows

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Our Premium Aluminium Window system can produce a range of residential casement windows in many styles and designs. These windows are very thermally efficient, slim and strong, using some of the latest technology to provide the very best in security, performan...

Premium Tilt Before Turn Windows

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These Tilt and Turn windows provide an ideal solution for high-rise applications where internal glazing and ease of cleaning are essential. Premium Tilt Before Turn windows are thermally efficient, secure and versatile. Suitable for all: Commercial, Retail, Re...

Smarts 47 Aluminium Windows

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Smarts 47 Windows are very popular, and offer everything you would expect from a quality aluminium window. The inherent strength of the aluminium means the frame is slimmer than PVCu or timber, letting the maximum amount of light into your home. These windows ...

Royale Aluminium Sash Windows

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Our Royale Sash Window incorporates the traditional styling of wooden box sash windows with the advantages of a thermally broken aluminium profile. A stylish, low maintenance and authentic sash window that is suitable for use in heritage and conservation areas...

Duration VS Plus Vertical Sliders

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Our VS Plus Sash Windows have a square, clean and simple design that is suitable for most applications. It is perfect for use in all types of modern architecture and provides a low maintenance alternative to timber sash windows. A combination of sealed units u...

Royale Putty-Line Heritage Windows

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The Royale Putty-line is one of the slimmest thermally broken aluminium windows on the market. Designed specifically to replace traditional putty glazed steel windows - featuring a 45¡ putty-line detail, they look almost identical to the windows they replicat...

Royale Heritage Windows

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Our Royale Steel Replacement Windows have been specifically designed as a slim-line, secure and thermally efficient replacement for original steel windows. They replicate the traditional styling, slimness and features of traditional steel windows so closely th...

Premium Plus Aluminium Windows

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Our Premium Plus Aluminium Windows are our top of the range, BFRC certified aluminium windows. They are beautifully slim, highly energy efficient and environmentally friendly windows that achieve an 'A' rating in energy efficiency. They have been certified to ...

Continental Aluminium Folding Windows

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These aluminium folding windows use the same tried and trusted system that we use for our excellent continental folding doors. With widths up to 6 metres, when open they can leave around a 90% clear opening. There are lots of opening styles such as all panels ...

Duraslide 2000 Sliding Windows

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This thermally efficient aluminium horizontal sliding window is an evolution of our original slide window system. It still offers the signature slim line profiles and minimal sight-lines often associated with this product. The new system features a modern larg...

Curved Aluminium Windows

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Duration Windows can produce curved aluminium windows using the latest computer controlled section bending machines. We can manufacture curved aluminium windows, top lites for doors, shaped and even circular windows. We have invested in training, £50K bendin...

Heritage (Stepped) Windows

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This aluminium window system is designed as a slim-line and thermally efficient replacement for steel windows. As part of our Heritage Range it uses steel look-a-like profiles which will maintain the character and integrity of your period property. Finishing t...

Duration Putty-Line Windows

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Our Putty-line Windows have been design specifically for use as a slim-line and thermally efficient replacement for old putty glazed steel windows. With an authentic 45¡ angled putty-line design they replicate the appearance and slim sight-lines of traditiona...