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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.

uPVC casement window

Perfect Crystal Windows
Sleek and classic appearance of our uPVC casement windows maximises the area of glass in the windows without compromising on thermal performance or security. Our system offers a complete solution for side or top hung outward opening casements with mullions, tr...

Wooden Casement Windows

The Sashed storm proof casement (Lipped) windows are manufactured with the opening window overlapping the frame to give excellent performance and weather ratings. The outward opening storm proof casement is the most frequently chosen wooden window design in th...


Masterframe Windows Ltd
Our installers can not only offer PVC-U options, but they can also supply you with solid wood windows, using oak, hard woods or softwood. Being a natural material, there is the chance that solid timber can sometimes twist and move over time. Warped timber des...

Flush Sash Windows

Flush sash windows are the latest exciting development from Liniar. They offer the realism of a traditional pre-1932 timber window combined with 21st century thermal benefits. Many property owners require a traditional timber window frame, sometimes due to pl...

Made-to-measure uPVC Sash Windows from London

Perfect Crystal Windows
Our uPVC Sash gives the visual appearance of a traditional style timber sash with all the features and benefits that modern technology provides. Narrow sight lines compliment elegant contoured profiles with meticulous thought and consideration given to appeara...


Our range of oak casement windows come with a variety of bar options and are available fully factory finished in golden oak stain or dark oak stain. Choose from various glazing options and finishes to reach a higher thermal performance and find the right spec...

Royale Putty-Line Heritage Windows

Duration Group
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...

Triple glazed timber mock sliding sash windows (78mm)

GreenSteps Ltd
GreenSteps mock sash windows for high performance domestic and commercial projects. KEY CHARACTERISTICS: Timber frames - Frames are made of engineered pine as standard, but oak, larch and special hardwoods are available on request. Triple glazed units. I...

Softline - Casement Windows

BB Bertrand Windows and Doors
SOFTLINE Window. Classical solutions, modern form and intrinsic beauty of wood – these are prime features of Softline product range. Thanks to their rounded edges and gentle shapes we gave our windows aesthetic design maintaining very good window performance...

The EB24 Windows Range

Clement Windows Ltd
EB24 windows and doors are available in five different styles, all of them have superb features which faithfully replicate your original steel windows. Our EB24 windows are generally fitted with sealed, double-glazed insulated glass units. The glass we use is...
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Did you know that the most common Standards for products within the Windows category are PAS24:2016 , Secured By Design and BS644:2012?'

Heritage Sliding Sash Windows

Heritage Sliding Sash windows are fitting for listed properties or those governed by the demands of conservation. These timber windows feature lambs tongue and putty bead mouldings and bars, Heritage Ventlock for child safety, decorative horn detail, slim fra...

Alitherm Heritage

Smart Systems
Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered. The window is designed to be built as a series of hor...


REHAU Tritec is our 60mm PVCu window and door system, designed to aesthetically complement both chamfered and sculptured options to create beautiful contemporary frames. Superior design and technology lies behind every REHAU Tritec window and door system. It...


Trade Frames
There are occasions when the contemporary style of double-glazed window frames just won’t suit older properties - or even modern houses that are built to a traditional design. Trade Frames understands this can sometimes be an issue and therefore offers a ran...

Historic Box Sash Window

Mumford and Wood
Our Historic Box Sash window is designed to replace original period windows often found in listed buildings or sensitive conservation areas where double glazing is not appropriate and the requirement to comply with building regulations are relaxed. The Histori...

Vertical Sliding Windows

Unique Window Systems Ltd
The Evolve vertical sliding window has been designed to offer superior ventilation. Both top and bottom sashes can be partially opened, encouraging fresh air to enter the building at the bottom of the window while warm, stale air escapes at the top. It means t...

Doors - Various Window Types

Ace Windows NE
Are you seeking the perfect entrance that will establish that unique look for your home or perhaps you just require a great looking affordable and secure door? Then you have finally found the right place. Here at Ace Windows NE we offer you many options to ch...

Period™ Edwardian Casement

Privett Timber Windows
Our hand-made Period™ Edwardian window collection reflects the glamour and elegance of window detailing introduced during the Edwardian era. This collection is characterised by window casements being recessed (stepped back) within the external frame. These w...

Eurocell Vertical Slider

Quantum Windows
This premium vertical sliding window system enables the sophisticated style of the Georgian era, adding real character to a home, without compromising on performance. Specification Cutting-edge design with sliding upper and lower window panes, both of which ...

uPVC Sash Windows

Everest Ltd
Everest uPVC sliding sash windows are the perfect choice for period homes as they retain the classic look and beauty of a Georgian, Edwardian or Victorian property but can also add a touch of style to a contemporary home by adding a traditional edge. But th...
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Did you know that the U-value (overall) for products within the Windows category, can range from 0.2 W/m2k to 4.9 W/m2k and the average is 1 W/m2k?

Timber Dual Turn Windows

Everest Ltd
The innovative design allows both sashes to swing completely round for easy cleaning from the inside. You can choose from either Softwood or Hardwood options, with painted and stained finishes respectively. And like all our timber windows, they re precision...