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Glazing Doors

Installing double glazing in your home is one of the easiest ways to make your home warmer and save money on your heating bills.

PVCu Windows

Aluminium Windows

Entrance Door

Biofolding Door


Why Choose Double Glazing?

Replacing double glazing is one of the easiest ways to improve the energy efficiency of your home. Double glazed units are made of 2 panes of glass, with an insulating gap in between, to keep warm air in and cold air out. This makes your home better insulated, meaning less draughts and reduced heating bills. Installing double glazing will also reduce noise and condensation levels in your home.

Double Glazing Options

As well as offering improved thermal efficiency, new double glazing can improve the aesthetics of your home. At Harefield Improvements, we offer a full range of secure and thermally efficient double glazed windows and doors. You can choose from energy efficient aluminium, PVCu or timber alternative window frames to suit your property. We also offer a full range of entrance doors including composite doors, French doors and sliding patio doors. If you are looking to really open your home up to your garden, you can choose from our full range of double glazed bi-folding and lift & slide doorsets. There is an impressive range of styles and colours available, so can choose the perfect design for your home.


Made in London

Double glazed windows and doors from Harefield Improvements are manufactured at our facility in Perivale, West London. By making our own windows, doors and conservatories, we can guarantee that the products we install are of the very best quality possible. We have over 35 years of experience in the glazing industry, so we have the knowledge and skill to ensure great quality products and professional installations. Find out more about our manufacturing. You can see our full product range in person, at our award-winning showrooms in West London. To book an appointment, call us on 020 8108 4379.

Colour Options

Windows and doors from Harefield Improvements are available in a full range of colours and finishes. Find out more about the options available on our windows and doors pages.