Double Glazed Windows

Make your home Warmer, Safer & Quieter with custom made Double Glazing. Wether your fitting new double glazed windows or replacing existing windows Synergy has the expertise and quality you demand. 

Enhance Your Home with
double glazed

Keep your home warm, quiet and safe with new windows from Synergy. Our uPVC windows come in a variety of styles and colours to suit your home so you save on your heating bills with double and triple glazing options all with long guarantees.

10 Year Warranty

Workmanship Guarantee

Carlisle Family Run Company

Beautiful Windows

Window Style Options

The beautiful thing about made to measure windows is how customisable they are. Whatever style you choose, you can rest assured they are all made to fit perfectly. But above all they are energy efficient and secure.

New uPVC Double Glazed Casement Window
Tilt And Turn
Tilt and turn new double glazed windows
Sliding sASH
Sliding Sash Double Glazed Window

Double Glazed Windows
colour options

You don’t just get white windows these days. Windows are available in any colour you can think of thanks to improvements in foils and sprays. So whether your looking for traditional woodgrains to modern greens, greys or even blues we have the windows for you.

Irish Oak Window Foils for double glazed windows
Irish Oak
Golden Oak window foil for double glazed windows
Golden Oak
Rosewood Window Foil for double glazed windows
Cream Window Foil for double glazed windows
Chartwell Green Window Foil for double glazed windows
Chartwell Green
Anthracite 7016 Window Foil for double glazed windows
Anthracite Grey
Light Grey Window Foil for double glazed windows
Light Grey
Black Window Foil for double glazed windows

wINDOW haNDLE Colours

Beautiful windows are not complete without beautiful hardware! Here at Synergy we have a wide range of handle styles and colours to choose from to compliment your new double glazed windows perfectly. So with the right handles your new windows can be picture perfect.

White Window Handle for double glazed windows in Cumbria
Black Window Handle for double glazed windows installed by Synergy in Carlisle Cumbria
Gold Window Handle for new uPVC windows installed by Synergy
Bright Chrome Window Handles for Double Glazed Windows
Bronze Window Handle for Double glazed Windows

Benefits Of New Double Glazed Windows

Upgrading your old single glazed windows or even old double glazed windows to new double glazed and triple glazed windows has many benefits. They include retaining more heat, reduced noise pollution, they can me more secure and can make your homes value increase. 

Energy Efficient Windows

Our extensive range of double glazed windows have been designed to keep your home warm. To do this we use two 4mm glass panes with a 16mm warm edge spacer bar creating a sealed unit which can then be filled with energy efficient gas. Thus helping your windows to reflect heat away in the summer and retain heat in the winter saving you money on your heating bills. 

Thermal Image of double glazed windows before and after installation of new double glazed windows
Window Security locking mechanism on windows by Synergy in Carlisle

Windows with Added Security

Security is an important part of our windows and doors. Not only do our windows need to be energy efficient and beautiful they need to be secure. Firstly our windows come with multipoint locking systems, key lock window handles, shoot bolts and additional features can be requested to make our windows Secure By Design. 

Windows fOR pEACE & qUIET

New double glazed windows can really help reduce the outside noise giving you peace and quiet throughout the year. Even if your home is in a particularly noisy area our Acoustic Glass option is specifically designed to reduce the noise you hear. So whether you live on a busy road or just want a bit more quiet our windows can help.

Double Glazed Windows

Frequently Asked Questions

Synergy uses one of the industries highest regarded window profiles to manufacture the windows we use. The windows are manufactured to British Standards and can last around 20 years. In addition to the expected life span of our windows we offer a 10 year warranty on the windows, a 5 year warranty on the sealed units and a 10 year workmanship warranty. This means you can buy with confidence and know that your windows are not only energy efficient but will last you years to come.

It’s very difficult to give a fixed cost for replacement double glazed windows. This is because the price will depend on the individual requirements and specification for the home. We provide a bespoke window fitting service so the price is bespoke too. Because of this, we offer a completely free quotation service.

Triple glazing is the most energy efficient glazing option on the market. Triple glazing is made from two panes of Low E glass and one pane of Low Iron glass. It is the best option for your home if you want to retain the maximum amount of heat and block out noise. Although if noise is an issue we also offer acoustic glass.
Glazing Options
If you would prefer triple glazing we can offer this as part of our quotation and installation process.

Our showroom and warehouse is in Carlisle but we install all our products all over Cumbria and up into Dumfries. In fact we regularly work in Whitehaven and Workington so if you would like to visit any of our installations we could arrange something close to where you live. 

New Doors with your
new windows

Like our uPVC windows our composite front and back doors are available in different styles and colours. This means that you can choose a matching door to your windows. Or if you prefer, you could opt for a completely different colour to make your new front door stand out.

We're Local

Your Local Home Improvements Company

When you buy double glazed windows from us your buying from a local Cumbrian, family run company based in Carlisle. We offer our fantastic product range complete with installation throughout Cumbria and Dumfriesshire. We employ local staff and offer affordable, quality products that are designed to last. Our FREE quotation service means you get to see the products before you buy in the comfort of your own home, and unlike our competitors, we DON’T employ heavy sales techniques. 





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