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.

Spectus Vertical Sliding Windows

Spectus Window Systems
Spectus; market leading Vertical Slider combines all the benefits of high performing modern material and functionality with period character and design. Widely recognised as one of the best PVC-U alternatives to traditional timber box sashes our Vertical Slide...

Spectus Flush Tilt & Turn Windows

Spectus Window Systems
This revolutionary flush tilt-turn window is an ideal solution or both medium-rise and high-rise buildings, such as residential housing, offices, hospitals and universities. It has been specifically designed to prevent the framework from overlapping to give a...

Spectus NEW Fully Mechanically Jointed Vertical Slider

Spectus Window Systems
Blending authentic sash window styling with superb performance Sash windows are a design classic, but traditional timber frames don’t offer the long-term performance and easy care of modern materials. With every detail of our PVC-U Vertical Sliders accura...

Spectus Casement Windows

Spectus Window Systems
Spectus provides a range of Elite 70 and Elite 63 casement windows, which are available in a range of styles from single top or sing hung openers to multi-lights and French windows. Provided internally or externally glazed offering bevelled, chamfered or ovolo...

Spectus Fully Reversible Windows

Spectus Window Systems
Our Fully Reversible windows are perfect for medium or high-rise properties, or indeed anywhere where there are access limitations. It combines excellent thermal and weathering performance in an easy to clean and maintain window. It has a 70mm depth frame and ...

Spectus Flush Casement Windows

Spectus Window Systems
Spectus flush casement windows mimic the traditional appearance of period properties, whilst offering superb energy efficiency and lower heating bills. They offer the perfect solution for planners in areas protected by conservation orders looking for a flus...

Spectus Tilt & Turn Windows

Spectus Window Systems
Spectus Tilt & Turn windows have a dual opening action and are available in Elite 70 and Elite 63. The windows are provided with all round locking, internally glazed, open-in, providing good security and weather tightness. The tilt before turn operation provid...