Secondary glazing is a slim, discreet panel added to the inside of your existing window, creating an extra layer without removing or altering the original frame. It’s a practical solution for improving noise insulation—especially useful in busy urban areas—and helps keep heat in during colder months. It’s often used in listed buildings or homes in conservation areas where changing the original windows isn’t allowed, offering better performance while preserving the property’s character.
From a sound insulation perspective, secondary glazing offers the most effective levels of noise reduction on today’s market, significantly outperforming all other glass solutions. Our bespoke 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%.
If security is your priority, secondary glazing offers a unique, additional deterrent to any would-be intruders. Unlike traditional windows, secondary glazing is incredibly difficult to open from the outside and creates a further layer of defence against forced entry. Our frames are made from only the most durable, high quality aluminium and are securely fixed to resist forcing.
If draughty windows are of bigger concern for your property, secondary glazing adds an extra layer of defence to guard your home against heat loss. The small gap between your existing window and the secondary unit effectively acts as an insulator, creating a separate layer of air between the two which can reduce heat loss byup to 65%.
The sleek, modern design of our secondary glazing systems ensures that you’re able to enjoy all the acoustic, thermal and security benefits, without having to compromise on style.
Each of our six unique product types are available as part of either our Classic or Enhanced range. With each range offering slim sightlines, easy installation and exceptional thermal and acoustic performance, you’ll be truly spoilt for choice.
Our tried and trusted range, Classic products are able to accommodate 4mm glazing and come fully equipped with slimline, durable frames that allows for exceptional style, functionality and performance. The Classic range is what put Granada on the map, keeping homes quiet, warm and secure for over 35 years.
Everything you’ve come to expect from Granada products, but with ultra-strong aluminium frames that support up to 10.8mm glass for enhanced noise reduction and thermal insulation. This improvement in performance comes at no expense of style though, as our enhanced frames are super-sleek for superior, unobtrusive aesthetics.
Level 1 Flemish
Level 1 Warwick
Level 2 Chantilly
Level 2 Minster
Level 2 Pelerine
Level 2 Sycamore
Level 3 Autumn
Level 3 Digital
Level 3 Taffeta
Level 4 Charcoal Sticks
Level 4 Contora
Level 4 Florielle
Level 4 Mayflower
Level 4 Oak
Level 4 Stippolyte
Level 5 Arctic
Level 5 Everglade
Level 5 Satin
An ideal solution for existing windows that require only occasional access, our lift out units provide an effective deterrent against heat loss and external noise. Fixed to either the face or the reveal of the existing window, our range of lift out units are made using a lightweight aluminium profile, which offers the flexibility to be easily removed if required.
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Arguably the most popular product in the entire range, our horizontal sliding units offer a sleek, slimline design aesthetic with minimal sight lines. Whether it’s for a period property, listed building or city centre apartment, our horizontal sliders seamlessly blend to their surroundings and provide extensive thermal and acoustic benefits, without even the slightest compromise on style.
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Ideal for homeowners that are either unable to replace their existing sash windows or don’t want to ruin their unique charm, our vertical sliding units provide all the advantages of modern living without impacting the façade. Enjoy a significant increase in noise reduction and thermal insulation without the need for thick, obtrusive frames.
For additional access, our vertical sliding units can be manufactured with slide pass functionality, which enables the two panels to slide completely past one another, ensuring the whole of the secondary unit can be accessed and cleaned.
For unlimited access, our vertical sliding units can be manufactured with a unique tilt-in feature, which enables both panels to individually pivot up to 180° inwards for supreme access.
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Suitably matched with every style of existing window, our slimline hinged units open inwards like a door and feature butt hinges. With hinges that can be positioned on either side of the unit, or hung from the top should the room require, this product is perhaps the most adaptable in our entire range. With sleek frames and no transoms or mullions to spoil the view, our slimline hinged units offer a truly unobstructed view of the world beyond the window.
For larger glass expanses we offer a hinged unit variation which supports windows larger windows and allows for 28mm acoustic double glazing.
Much the same as our hinged unit, but with two panels as opposed to one for wider glass expanses. Also able to accommodate 28mm acoustic double glazing.
A two-panel variation of our slimline hinged unit. As with our standard double hinged unit, this product is ideal for larger glass expanses, effortlessly complimenting
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At South Yorkshire Windows, we specialise in supplying and installing high-quality Secondary Glazing, made to measure for your home. Each window is manufactured in our Yorkshire factory using durable, energy-efficient materials that are built to last. Whether you’re replacing existing windows or upgrading a flat window, we’ll ensure a perfect fit that suits your property style. With decades of experience, trusted customer reviews, and a commitment to honest pricing, we’re a reliable choice for homeowners across the region. From design to installation, we make the process simple, stress-free, and tailored to your needs.
The 'Made In Britain' logo can only be used by companies who's products are made in Britain and meet the standards of the British people. We are proud that our profile has the pedigree to be able to be associated with this organisation and we are proud to be British.
This accreditation is part of the British Standards system and shows that every component used to make the product has been subjected to a series of tests, demonstrating enhanced security performance for your peace of mind.
Our Lead-free profile is made from 100% leadfree PVCu. Better for the environment and better for you and your family. Profile designed by Liniar is fully recyclable, giving your family peace of mind that it’s environmentally-friendly.
Assure is an official, UKAS-accredited Competent Persons Scheme authorised by the Ministry of Housing, Communities and Local Government (MHCLG) for the replacement of windows, roof windows, roof lights and doors in England and Wales
The 'Made In Britain' logo can only be used by companies who's products are made in Britain and meet the standards of the British people. We are proud that our profile has the pedigree to be able to be associated with this organisation and we are proud to be British.
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