Modern Living Room With Big Windows

Secondary Window Glazing for Listed Buildings

The Heritage Window’s range of aluminium secondary glazing units and sliders is an ideal solution for listed properties and homes within conservation areas. Where replacement windows are not a viable option, secondary glazing for listed buildings provides all the thermal and acoustic benefits you’d expect from a 21st-century window system.

Our entire suite of secondary glazing products is made to measure and feature a sleek, unobtrusive aluminium profile that is built to last. Manufactured to the highest quality and made to suit any existing décor, our secondary heritage glazing is designed to excel in both form and function.

Improving the thermal and acoustic performance of your property shouldn’t negatively impact the character of your home. Our entire range of bespoke secondary glazing products are manufactured with durable, slimline aluminium frames that accentuate the stylings of the existing window. We also offer a huge range of ancillaries and over 200 RAL colours for full customisation.

Explore our units and sliders

Interior of Bedroom

Horizontal Slider

Home Study With Large Window And Bookshelves

Vertical Slider

Living Room With Black Frame French Windows

Hinged Unit

Interior of Living Room With Red Sofas

Lift Out Unit

Modern Kitchen Interior

Fixed Unit

Living Room With Black Window Frames

Bespoke and Arched Units

Why should you install secondary window glazing in listed or heritage buildings?

With such a high volume of heritage and listed buildings in the UK, it’s important for homeowners to maintain energy efficiency in their listed homes whilst also respecting period design features.

Older homes have some of the lowest energy efficiency ratings on the market, so investing in premium secondary glazing for listed buildings will insulate your home and waste less energy. This isn’t just good for the planet, it’s good for your wallet – lowering energy bills and keeping your rooms warmer for longer.

As well as helping to insulate, secondary glazing for listed buildings will deter opportunistic burglars thanks to the reinforced glass increasing your security.

Do you need planning permission to install secondary glazing in listed buildings?

As with many listed property alterations, you will need planning permission to install secondary glazing in listed buildings. To do this, you will have to send an application for listed building consent for alteration.

We have countless experiences installing aluminium secondary-glazed windows for heritage buildings. Our trusted and dedicated team of designers and installers were responsible for the refurbishment of Evelyn House, Kensington.

Following a thorough planning process, we installed new double-glazed Benenden Conservation windows and replica bronze panels, respecting the building’s original stylings whilst also increasing energy efficiency.

Secondary glazing benefits

Quite simply, homeowners choose secondary glazed windows because they’re quiet, warm and secure. These three features are the bedrock of the unique secondary glazing system and are the reason why so many homeowners are adopting secondary glazing.

Noise Reduction

Noise Reduction

Secondary glazing offers the most effective levels of noise reduction whilst also boasting thinner aluminium frames.

Thermal Insulation

Thermal Insulation

Secondary glazing adds an extra layer of defence to guard your home against heat loss , ideal for older properties or those concerned with energy usage.

Enhanced Security

Enhanced Security

Secondary glazing makes your windows incredibly difficult to open from the outside, creating a further layer of defence against forced entry.

Reduced Condensation

Reduced Condensation

Secondary glazing will help eliminate condensation in the home , preventing damp and chill.


Types of Glazing Options

Our decades of industry experience allow us to offer customers the freedom to personalise their secondary glazing with two industry-leading options. Make sure you get the best secondary glazing for your home by considering which is ideal for your property.

If you’re still unsure which is best for you, contact our expert team today to find out more.

Classic secondary glazing

Classic secondary glazing can accommodate 4mm glazing and comes fully equipped with slimline, durable aluminium frames that allow for exceptional style, functionality and performance.

Enhanced secondary glazing

With ultra-strong slimline aluminium frames that support up to 10.8mm glass for enhanced noise reduction and thermal insulation, this performance improvement comes at no expense of style. The frames are super-sleek for refined, unobtrusive aesthetics and are designed as an enhanced aluminium secondary glazing option.


Why choose The Heritage Window Company?

The Heritage Window Company not only offers a trusted quality service, but also has 30 years of experience to back it up. Our aluminium windows are both durable and fitted to the highest standard, offering a full 10-year insurance-backed guarantee protected by the IWA and FENSA.

Over the decades, our in-house team of engineers and designers have mastered modern glazing techniques to stay at the forefront of the industry. We also oversee delivery and installation to make sure the job is done right every time.

We understand that there is no one-size-fits-all approach to designing, engineering and fitting windows for heritage or listed properties. Our designs are as unique as your home’s specifications, giving you a large range of windows to choose from, with further variations available through our ancillary range.

We make sure all our materials are sourced responsibly, made with aluminium surface-mined from bauxite – a recyclable material. We mitigate any environmental impact where we can.

Secondary glazing FAQs