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PVCu Sliding Sash Windows

Marrying traditional looks and modern performance - they are virtually indistinguishable from timber sash windows


Vertical Sliding Sash

The vertical sliding sash window design marries the elegant traditional appearance with modern performance. Manufactured from uPVC they are durable, will not rot or warp and require no painting. All of these benefits ensure that they retain their colour and shape throughout the years with the minimum requirement of maintenance.

This type of window is suitable for both replacing existing timber sliding sash in period buildings and adding rich characteristics of heritage. uPVC sliding sash windows retain all the traditional features of their familiar counterpart but with the enhanced benefits that modern PVCu systems provide. Not only do they look stunning and virtually indistinguishable from the timber sliding sash they are designed with an inward opening tilt function to allow easy cleaning of the glass and frame from the inside of the property.


The finishing touches… More than just distinctive looks

Sealing & Finishing

Enhance your home’s comfort with a Green Kite installation.

Paying attention to the fine details and the finishing are of utmost importance to the overall performance and look of your windows. Green Kite installers are trained to use only industry-leading approved materials.

Mock Horns

The addition of mock horns echoes a traditional style and adds elegance to your new sliding sash windows.

They are available as ‘run-through’ horns which is manufactured from one piece of continuous profile to make the sash window resemble the old style timber sash or you could opt for the attached mock sash horns.

Glazing Options

More than just glass! Our choice of glazing designs provides you with great choice so that you can personalise your windows to your chosen style. Speak to our representatives to see how you can change the look and feel of your home and save money at the same time through Green Kite’s marketing leading ‘A+’ energy efficient window range.


Choose the best seal on the market. The Q-Lon is the world’s best weatherseal gasket. Q-lon keeps the weather out, the heat in and reduces noise pollution. Make an appointment with us and our representative can demonstrate this amazing seal to you.


Safety and Security is built into every Green Kite Sliding Sash window. The elegant locking clasp secures the top and bottom sashes in place. Further security is provided by a key lock.

Tilt Function

The illustration below shows how Green Kite’s tilting sashes operates for greater ease and safety. They make cleaning them simple if they were to be located on floors above ground level.

Warm Edge Spacer

Up to 80% of a double glazed window’s energy losses occur at the glass edge. Ordinary aluminium spacers conduct hot and cold temperatures, therefore, allowing it to travel both in and out of the perimeter of the glass in your windows. During Winter metal/aluminium spacers allow heat to escape as well as encourage condensation. To overcome these problems Green Kite ‘A+’ rated windows and doors feature the Duralite Warm Edge Spacer. It is up to 22 times more efficient than ordinary spacers helping greatly to reduce your heating costs.


Our tension spring balance mechanism allows for effort free operation.

There is a wide range of handles and accessories for our sliding sash windows. Please enquire about these choices where our Window Representative can help advise you regarding the best options depending on the location and application of your windows.


Features and Benefits

Thermal performance

Our sliding sash windows are amongst the most thermally efficient available in the UK today. 'B' rated as standard with 'A' rated options available - bringing your energy costs down

Easy to clean

Our range of sliding sash windows are designed to look stunning but also built with practicality in mind. With built-in inward opening opening tilt facility to allow cleaning of the glass and frame from the inside of your home

Concealed gaskets and weatherseals

Giving the window a clean look and providing long term weathering and thermal efficiency. Excellent weathering performance prevents the PVCu profile from degrading, bending and warping, further advantage gained with a brush pile seal on sash edges and the outer frame

Ease of use

The highest quality balancing mechanisms designed to hold each sash at any height

Secured By Design

We are proud to offer one of the most secure windows on the market. Awarded the highly respected 'Secured By Design' accreditation, focusing on crime prevention of homes and properties

Combination frames

Our sliding sash windows can be designed and manufactured for for every application. Flags for particularly wide windows, Bays and Arched top windows are all accommodated for

One window, unlimited choice

Available in an array of varying finishes from our smooth and wood-grain options to special RAL colours and traditional heritage colours like Farrow & Ball. The choice really is endless

Finishing touches

Hardware and window accessory options designed to complement the window

Vertical Sliding Sash
Traditional Appearance, Modern Performance

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What our customer say about us

Full house of windows.

We are totally satisfied with Glazing Bureau. They were very efficient, quick and the fitters carried out the work amazingly it was as though they were not there in my house. Disruption was at a minimum, my son in law wants his windows installed by this firm as we know we can trust them

Washington, Check-A-Trade posted 29 June 2018

Guardian Conservatory Tiled Roof.

No pressure at all from the salesman. All the workmen take pride in their work. Very conscientious. We love the finished job

Newcastle upon Tyne. Check-A-Trade posted 27 June 2018

Composite Door & Door Side Window.

One of the most reliable companies around and very accommodating as I had a slight problem with one of the doors and Glazing Bureau had no problems sending someone out to fix it for me

Prudhoe, Check-A-Trade posted 15 June 2018

9 Windows, 2 Doors & Patio Doors.

Recommended to me by a neighbour, everything is great. Excellent service

Berwick-upon-Tweed, Check-A-Trade posted 29 May 2018


I am a happy returning customer. Needed more more work from them as I was thoroughly impressed when they came to installed the conservatory roof for us a little over a year ago. Very reliable, honest and friendly. You won't go wrong opting to have your work carried out by this firm

Seaham, Check-A-Trade posted 8 May 2018

Entire house of windows, doors & porch.

DELIGHTED! 10+, 5 Stars can’t praise them enough. Guys are a hoot. Not a bad word said about my rubbish tea. Use these and don’t hesitate/consider any other firm. Did work for my mum. Others were cheaper, but I wanted quality and affordability. The salesman is a lovely guy and well informed. He said, “Give us a chance”, so pleased I listened. Can’t thank them enough. New windows should be messy/stressful instead it was a hoot. House was left immaculate. Recommend them over and over

Chester le Street, Check-A-Trade posted 1 May 2018


Quality workmanship, a lovely fitting team who worked tirelessly on our installation. Very pleased with the product and finished work. Will be recommending Glazing Bureau in our village

Berwick-upon-Tweed, Check-A-Trade posted 20 April 2018

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