Secondary glazing is a window fitted behind an existing one. This adds insulation and helps reduce outside noise without the cost and mess of completely replacing a window. Secondary glazing is a good solution for listed properties where window replacement is not an option.
Secondary glazing comes in a range of styles to suit different properties and window types. They can be opened by sliding or by hinges, ideal for period properties with sash windows or for traditional casement windows, seamlessly adding energy efficiency to a home.
Designed to match your existing windows, horizontal frames slide smoothly open and closed on aluminium runners, helping keep heat in and draughts out.
This option is ideal for traditional casement windows, as the secondary glazing swings open on a small hinge, in line with the mechanism of the window behind it.
Perfect for box sash windows, the panels in these vertical sliding frames move easily up, down and can tilt inwards to provide easy cleaning access to the original window.
Secondary glazing adds a layer of sound insulation which helps reduce outside noise. This is particularly useful if your home has single glazed windows or has rooms facing onto a busy road.
A more discreet alternative to replacing your windows, secondary glazing needs little upkeep, requiring the occasional clean and lubrication. The glass panels can even be removed to make for easy cleaning when required.
Made from strong aluminium, Secondary glazing frames provide a strong barrier behind your existing windows. Having a window fitted behind an existing window ultimately improves overall security.
With a faster installation process and fewer materials, secondary glazing can be more affordable than replacing all your windows. This can make it a good temporary or permanent solution for improving the energy efficiency of your home without the expense of new double glazing.
Installing secondary glazing adds another barrier that helps prevent draughts and cold air coming through your windows. This helps to lower the energy consumption of your home and reduce energy bills in the colder months.
A 10-year parts and labour guarantee is included in your Anglian double glazing price.
Our products are made from start to finish in a British factory by skilled craftspeople.
If you find cheaper like for like uPVC windows elsewhere, we'll match the price.
Is secondary glazing or double glazing the right option for your home? Both options come with their own advantages, but can be more suitable for different properties.
Secondary glazing is an extra pane of glass behind the inside of an existing window. A great way to stop draughts, reduce heat loss and lower outside noise, secondary glazing is often a cheaper and less disruptive solution compared to double glazing. It is also a good solution for homes in conservation areas and listed buildings where replacement is impossible or cost prohibitive.
Double glazing is a window with two panes of glass, separated by a gas-filled cavity. It is a direct replacement for existing windows to improve security, energy efficiency and aesthetics. While double glazing has been a mainstay in homes across the country since the 60s, constant evolution means it is available across a range of window styles with a huge amount of customisation available.
Window replacement options can be limited for listed buildings or those in conservation areas. Preserving original features means replacements need to be like for like and some windows can't be replaced at all. These like for like replacements can be very expensive, with some options only available via specialists.
Secondary glazing provides a more affordable option, sitting behind existing windows without harming the building structure. They add much needed insulation, helping homes feel warmer and also reducing outside noise.
Take a look at our industry accreditations and partnerships to see how we build quality into everything we design and manufacture. From the best in customer service to sustainable materials, we always aim for the highest standards.
The Fenestration Self-Assessment Scheme (FENSA) ensures replacement window and door installations comply with building regulations for England and Wales. You receive a FENSA certificate to keep as proof of compliance.
Anglian is a leading member of the Glass and Glazing Federation (GGF). The GGF is the most influential Trade Federation in the industry, recognised by government for their in-house technical expertise, which helps influence key legislation within our sector.
The ‘Made in Britain’ marque on all our products means they are made from start to finish in a British factory by British craftspeople.
Recovinyl is an initiative advancing the sustainable development of the European PVC industry by improving production processes, minimise emissions, develop recycling technology and boost the collection and recycling of waste.
TrustMark is a not-for-profit organisation operating a quality mark framework in the repair, maintenance and improvement sector. Registration with Trustmark demonstrates commitment to customer service, high standards and continual improvement.
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Find out more about the different types of glazing and how they keep your home warmer and more secure.
Learn more about the energy efficiency of different glazing types and the options to help your home retain heat in Winter.
Discover how we help you create bespoke windows that are just right for your space, and you home.
Browse the full range of styles, colours and glass options in our free windows brochure.
Your questions about Secondary Glazing, answered by us.
Secondary glazing can help reduce the chance of condensation forming your windows. Condensation is formed when warm moist air meets a cold surface. Secondary glazing sits behind windows that are exposed to colder temperatures, creating a barrier between them and the rest of your home. This minimises the chances of condensation forming and keeps the warm air inside.
It is not possible to say how much heat secondary glazing would save for your home, because that varies depending on the window it sits behind. What is undoubtedly true is that secondary glazing provides a noticeable difference to heat retention in a room. The extra layer of air and glass reduces the amount of heat that can transfer through to the window and outside, helping to keep your home warmer.
Secondary glazing can be a cost-effective investment for the long-term value of your home. The increased energy efficiency, noise reduction, and security can add value to your property, making it more appealing for potential buyers.
Secondary glazing can be an effective solution for many properties, particularly period homes that can’t be fitted with modern double glazing. The extra layer of glass and the air space behind it will make a big difference in reducing heat loss and outside noise, making them very much worth it for many properties. They represent a cost-effective option for any home where you can’t or don’t want to replace the original windows with modern double glazing.
Secondary glazing can last for at least a decade to beyond 20 years, so long as they are properly maintained. Our bespoke secondary glazing is made from durable materials and professionally fitted for perfect and reliable use for many years.
Temporary secondary glazing is designed to be easily removable, often using panels attached by magnets or adhesive. Permanent secondary glazing is professionally fitted with durable frames, designed to stay in place for as long as needed, providing lasting insulation and noise reduction to the property. Despite the term permanent, this type of secondary glazing can be installed and removed without damage to the fabric of the building.
To clean the inside of side-hinged secondary windows, open them fully and clean them as you would the outside. Secondary windows on vertical sliders can be tilted open to allow for easy cleaning. With horizontal sliders, take them out of the sliders and clean the panels individually.
