UPVC Double Glazed Casement Windows - The UK's most popular window



We strive to offer you the best price for your replacement windows and doors however we will beat any like for like genuine like for like quotation.


The UK homeowners most popular choice for replacement double glazed and triple glazed UPVC windows.  You can customise the design and have the openers in the most convenient position to suit your needs.  'A' Energy Rated, a wide range of colours and advanced security as standard.  This stunning window solution will transform your home.  Let Windoor Online Limited provide you with a quotation for your new UPVC Casement Windows today.

Our award winning UPVC Casement Window allows you to choose from chamfered or sculptured profile.  The chamfered profile or ‘2500’ system as it’s technically known has modern flat edging detail to create a clean and contemporary window solution.  In contrast to this, our most popular UPVC Casement Window profile is the traditional sculptured frame detail, or ‘2800’ system as it’s technically known.  With it’s attractive smooth curved frame edge detail, this heritage window is a perfect UPVC alternative to the old traditional timber windows.


Our UPVC Casement Windows can be designed with the openers positioned to suit your needs and your desired look.  At Windoor, all of our UPVC Casement Windows are bespoke and made to your sized and specification which means almost anything is possible.  Not only achieving amazing aesthetics, unrivalled security and superior energy efficiency, but your new windows can be practical too.  Just talk to us about your dream solution, chances are we can do it.


Our UPVC Casement Windows are available with double or triple glazing.  With double glazing, the windows achieve an overall U Value of 1.4 W/m2k and an energy rating of 'A+'.


With triple glazing, the U Value can be as low as 1.0 W/m2k, with an energy rating of 'A++'.  With multi chambered Deceuninck profile, engineered in Belgium and extruded in the UK, you can rest assured that your new windows are best in class.


UPVC is durable and secure.  UPVC Casement Windows from Windoor Online Ltd are installed with Avocet shootbolt locking systems as standard.  They are all also available with upgraded security features and they can even reach the highest level of certification, Secured by Design (SBD), meaning they are endorsed by the Association of Chief Police Officers.


The majority of home owners consider security of equal or even more importance than aesthetics.  If you're investing in new windows, don't cut corners when it comes to security.



Your new windows can be finished off with a choice of quality Hardex coated 10 year guaranteed beautiful chrome, gold, satin chrome or graphite finished handles, or a choice of antique black or pewter old-fashioned decorative handles. 


For example you may finish your windows with monkey tail handles, tear drop handles or even a traditional looking dummy peg stay.  Windoor helps you personalise every single detail of your new UPVC casement windows.


Colour is the new white.  Windoor offer our UPVC Casement Windows in a choice of 26 different colourways as standard, this vast colour range also includes dual woodgrain options, for example, you could opt for a Agate Grey Woodgrain to the external face, with a bright neutral heritage white woodgrain to the internal. 


Choosing the right colour for your new UPVC casement windows will transform the look of your home.  A popular choice and a cost effective alternative to aluminium, is the UPVC Flush Casement window in a smooth Anthracite Grey finish externally, which replicates the look of modern dark grey aluminium windows.



Your new replacement UPVC Casement Windows can be manufactured with double glazed or triple glazed glass units.  We use a range of high performance glass solutions from Pilkington UK and Saint Gobain.  Our internally soft coated K glass offers excellent thermal insulation as the heat bounces off the glass and back into the internal living space.

In some cases Windoor will add Argon Gas to the double glazed units.  Gas is denser than air, which results in greater energy efficiency and a lower u-value.

If your home has windows that are low to your internal floor level, We will instinctively upgrade your windows to include toughened glass. Toughened glass is achieved by subjecting the unit to a heating and cooling treatment whereby high compressive stresses are set up at the surfaces with balancing tensile stresses in the centre.  It’s primary benefit is that if broken, the glass breaks into none sharp pieces to reduce the risk of being cut by sharp broken glass.


If you’re aiming to improve security or achieve excellent noise reduction, Windoor can offer acoustic laminated glass from Pilkington. The desired performance is achieved by combining various thickness of glass with a special polyvinylbutyral interlayer.


For bathrooms, dressing rooms, or perhaps just windows that are overlooked, you can choose from a range of decorative obscured glass.  We offer every pattern available in the Pilkington obscured range.


You can customise your UPVC Double Glazed Casement Windows, by adding authentic surface mounted glazing bars, modern, clean internal fret bars or keep the glass panes bar free to maximise the light flooding into your home and achieve a contemporary look. 


Our windows are all bespoke, made to measure and designed to your specification which means you can select a glazing bar layout to complement the aesthetics of your home.  Windoor are also able to provide square, diamond or bespoke layout lead, in a choice of modern or aged, 6mm or 9mm.  The options are vast so just talk to us and we’ll help you find the perfect looking UPVC Double Glazed Casement window for your home.

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You can relax as all our casement windows and installation are covered with an 10 year insurance backed guarantee (IBG) with HomePro against defects and malfunctions so you have nothing to worry about.


Contact us today to get your free, no obligation quote for new windows and doors.  Email us, call us or fill out the form below and we'll do the rest.


Tel: 01274 976733

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