Secondary glazing makes your home warmer, quieter and more secure.

Our entire suite of bespoke secondary glazing products are made to measure and feature a sleek, unobtrusive aluminium profile. Discover the best fit for your home.

Granada Secondary Glazing is the largest manufacturer of secondary glazing in the UK, producing around 25,000 frames every single year.

Granada Secondary Glazing's range of products

Our range of secondary glazing is made to measure and built to last. We have a wide variety of products to choose from, whether you require vertical sliding secondary glazing for sash windows, or bespoke secondary glazing for custom window shapes, our team can design, manufacture and install the perfect solution for your home. Whether you own a new build, listed property or commercial property, we can fit your requirements.

What does secondary glazing look like?

Secondary glazing involves the precision installation of a slimline glazed unit inside your existing windows. Barely noticeable unless you’re trying to look for it, our latest product range boasts ultra-slim sightlines for a truly unobstructed view of the world beyond the window. A near endless array of RAL colours is available to match any existing window style.

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Styled To Match Your Home

With five separate product types to choose from, plus the ability to have custom-manufactured shapes, there is no limit to the aesthetic capabilities of our secondary glazing. Whatever your style of existing window, there is a secondary glazing solution to match. All our product types feature the same slim-line, unobtrusive aesthetics. Long gone are the days of bulky secondary glazed frames, our product range is fully optimised for modern day living.

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Slim, Discreet and Stylish

Our secondary glazing fits into traditional and contemporary décor and doesn’t affect the appearance of existing windows. Engineered to fit exactly on or within the original window with a choice of many styles and colours, our range is designed to blend in. Style, colour and shape can be tailored to your exact requirements and specifications.

Additional Security For Your Home

Secondary glazing also acts as a visual deterrent and additional barrier to entry. We use toughened glass and best-grade aluminium profile to manufacture windows that are virtually unbreakable. No need for unsightly measures that will affect the value of your property. Thanks to secondary glazing, our customers can enjoy a warmer, home secure home, without damaging their existing décor.

Secondary Glazing Installation - Murrays' Mills

Hear from Lindsey Gordon about how we installed our industry-leading secondary glazing solutions within her apartment. Living in an early 19th Century converted mill in the heart of Manchester, the building is listed, which means Lindsey was unable to change her existing windows.

Thankfully, we were on hand to help make her home quiet, warm and secure…

Reduce Noise and Retain Heat

To reduce noise and improve thermal insulation, secondary glazing offers an effective and affordable alternative to traditional window replacement. If external noise is a persistent issue in your home, secondary glazing is the most effective way to preserve and enhance your peace and quiet. If draughty windows are of bigger concern for your property, secondary glazing adds an extra layer of defence to protect your home from heat loss. The results are staggering, with reduced noise levels of up to 80% and a reduction in heat loss of up to 65%.

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Easy To Maintain

Several of our product types come with removable secondary glazed frames, allowing for unrivalled cleaning and maintenance access. Our new secondary glazing product range expands on this, offering a brand-new ‘Slide Past’ variation of our vertical sliding unit, which removes blind spots for cleaning access. The purpose of secondary glazing is to enhance what is already there, which is why we’ve worked to ensure all our product types are easy to maintain.

Advanced Quality Products

We use only the highest grade, strongest and most durable aluminium to produce secondary glazing units of unparalleled quality. They are all crafted and engineered at our state-of-the-art manufacturing facility in Sheffield, incorporating best-of-British workmanship.

Installation and 10-Year Warranty

Granada-approved installers are trained and accredited by us, or you can employ your own fitter. Our 10-year manufacturer warranty is standard on all products, in addition to the installer’s warranty. We control the entire manufacturing process, so quality is assured, and have a leading reputation of over 35 years industry experience.

A colour to suit your scheme

Find the perfect match for your Granada secondary glazing using our range of over 200 RAL colours. Whether you own a new build, listed property or commercial property, we can fit your requirement.

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Seamless Installation

We recommend that our secondary glazing products are installed by one of our trusted, verified installers. We work with only the best installation companies across the UK to ensure homeowners are offered a seamless secondary glazing installation. Products can be provided in kit form for self-installation upon request, though we do recommend using one of our dedicated secondary glazing installers.

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Find Inspiration

Explore hundreds of design options whether you’re upgrading an older property or increasing the value of an existing one. Find solutions and your inspiration here – just imagine the possibilities. Our installers transform properties whether old or new, listed or newly built, into energy-efficient, fully functioning spaces.

An Array Of Benefits

Beyond the reduction in external noise and heat loss, secondary glazing also allows homes to retain their character and charm, whilst benefitting from 21st century thermal and acoustic performance. In monetary terms, replacing timber sash windows can often be an expensive affair. Installing secondary glazing on the other hand is a far cheaper and simpler process. The cost saving doesn’t stop there though, as our secondary glazing solution radically reduces heating costs by ensuring the cold weather remains outside.

Secondary Glazing vs Double Glazing

From a noise cancellation perspective, secondary glazing is the most effective way to reduce noise within our customers homes, even more so than the most high-spec double glazing solution. The small gap between the existing window and the secondary unit effectively acts as an acoustic insulator, blocking sound as it attends to enter the property. Our secondary glazing is manufactured using state-of-the-art machinery to lock-in a tightly sealed frame which reduces noise levels by up to a whopping 80%.

The Granada difference
Quiet
Secondary glazing offers the most effective sound insulation. Reduces noise by up to 80% and significantly outperforms double glazing.
Warm
Improves thermal insulation of existing single-glazed windows by around 65%, approximately 10% more than double glazing achieves.
Secure
An affordable, discreet, highly effective solution to enhancing security. No external access required, ideal for multi-storey buildings.

Tap Into Healthier, Smarter Living

A greater sense of well-being begins with the spaces around us. We are inspired by light-filled, quiet and comfortable rooms that also let the views in. It’s how everyone wants to live today. We at Granada design and manufacture affordable secondary glazing products that support this vision.

Does secondary glazing add value?

One area that secondary glazing unquestionably adds value, is your energy bills. Did you know that you can lose up to 10% of your home’s heat through poorly performing windows? This is even more noticeable in older homes that don’t offer a lot of insulation. Secondary glazing is the perfect solution, protecting your existing windows, improving their lifespan and saving up to 10% more energy than you would with traditional double glazing.

What is the best secondary glazing?

At Granada Secondary Glazing, we manufacture using only the highest-grade aluminium profile, with hardware that is built to last. Our aluminium secondary glazing is strong and effective for noise reduction and heat retention. It also gives a much slimmer profile than other frames (such as wooden secondary glazing), it is built to stand the test of time (unlike magnetic secondary glazing) and continues to give you access to the main window (unlike secondary glazing film).

Secondary Glazing FAQs

Secondary glazing is used to combat all sorts of annoyances within the home. Noise, cold temperatures and condensation issues can be managed and controlled using our solution. We also offer multiple design and glass options to match your décor.

Find out more about the benefits of secondary glazing.

Our whole range of secondary glazing is made to measure and features an unobtrusive profile. We can fit a range of standard window styles and even offer a bespoke secondary glazing service for the less common shapes.

View our full range of secondary glazing products.

Secondary glazing is scientifically proven to reduce noise in your home by up to 54 decibels, giving your windows unrivalled levels of acoustic performance. Perfect for built-up areas such as homes near trainlines or under flightpaths.

Learn more about why secondary glazing provides the most effective levels of noise reduction.

The extra layer of protection offered by secondary glazing ensures the heat remains firmly within your home. Our solutions reduce heat loss by up to 60% and improves your carbon footprint.

Learn more about how secondary glazing helps with thermal insulation.

Secondary glazing outperforms double glazing in nearly all areas. Offering more than double the sound protection as well as increased thermal insulation. Secondary glazing can also be used on heritage properties without destroying to history or the status of the building.

Take a look at the other secondary glazing benefits.

You’ll be amazed at how cost-effective our entire suite of secondary glazing products are. You also receive the added benefit of saving money with secondary glazing installed, as your energy bills reduce due to less heat escaping.

Take a look at how secondary glazing can save you money and how it can add value to your home.

Alongside the thermal and noise benefits that you receive with secondary glazing, it also adds an additional layer of protection to your home against any would be intruders. A very discreet security feature that reduces the need for unsightly grills and other preventative measures.

Find out about the other benefits of secondary glazing.

Start your secondary glazing journey today...

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