Is Secondary Glazing Any Good? Yes – Here’s Why!

Is Secondary Glazing Any Good? Yes – Here’s Why!

If you’re looking to renovate your windows, you might have heard about secondary glazing. But the question remains – is secondary glazing any good? Simply put, the answer is a resounding ‘yes’.

Secondary glazing comes with many benefits, but how exactly will it make a difference to your home? Let’s run through some of the advantages of installing secondary glazing now.

Is secondary glazing any good?

Many homeowners have discovered the advantages of installing secondary glazing in their home. Secondary glazing offers unique benefits for every age and style of building. If the advantages below sound good to you – then secondary glazing is the right choice for your property!

Extra warmth for your home

Installing secondary glazing brings warmth to chilly properties. The installation of a secondary panel creates an airtight barrier between the interior of your home and the cold outside air – keeping the warmth in and the cold out.

Secondary glazing can see your thermal efficiency shoot up by 60%, lowering your heating bills and your carbon footprint. At a time when fuel prices are skyrocketing, an efficient home is a must. Plus, there’s the additional option of enhancing the thermal insulation with energy-efficient Pilkington K or Low E glazing.

Planet-friendly renovation

Not only can secondary glazing reduce your energy consumption, but it protects the planet in other ways. By adding to your existing window rather than replacing it, you prevent the old structure going to landfill. You also sidestep all of the waste produced in the process of producing uPVC, which is used in most modern windows.

Secondary glazing is much more durable than a PVC unit – when just one part of a plastic window frame breaks, the whole structure needs replacing. This contributes to many tonnes of non-recyclable waste each year. Secondary glazing is recyclable, meaning that if you ever want to get rid of it, you can do so sustainably.

Secondary glazing keeps your home quiet

Struggling to get a good night’s sleep? Secondary glazing can make a real difference. Especially with so many people working from home, having a peaceful home environment is more important than ever.

The air gap and secondary pane of glass offer added protection from disruptive outside noise. In fact, with the right specification and choice of glass, secondary glazing can reduce the noise entering your home by almost 80%. Whether it’s road traffic, air traffic or just a noisy neighbourhood, secondary glazing can help you keep outdoor noise outdoors.

If sound insulation is a priority for you, the most important factors to consider are the thickness of your chosen glass and the gap between the two panes. If you’d like to know the level of sound reduction you could achieve through secondary glazing, why not check out our acoustic data performance sheet?

Secure your home from unwanted intruders

In terms of security, your windows and doors are major points of weakness. But is secondary glazing any good at keeping intruders out? Absolutely!

A robust secondary panel provides an extra layer of protection – toughening windows against breakages and providing another obstacle for anyone who might try to force their way inside. Clearview also offers a range of optional security locks and handles for extra peace of mind. Not just for windows, this extra security can help doors too.

Reduce condensation – and mould!

From heating to cooking and even breathing, many everyday activities add moisture to the air. When this moisture touches cold glass, it’s cooled back into a liquid. The more moisture, the more condensation forms on the inside surfaces of your windows – and that can culminate in the formation of mould and mildew. This is a potential health hazard for anyone, but especially vulnerable or allergy-prone people in your household.

This is particularly an issue for cold, single-glazed windows. But condensation can also form between the panes of glass of double-glazed windows, if they’re in poor condition.

Is secondary glazing any good for condensation? Absoluely. What makes secondary glazing such an effective solution to condensation is its function as an internal seal, which not only provides a more balanced ventilation within the window – it also tackles the root cause of the problem, preventing the inside pane from becoming cold and attracting moisture.

Many forms of secondary glazing also allow you to access the space between the panes. This means that you can place things such as silica bags in the cavity to help absorb excess moisture.

Quick and easy installation

Want to keep your renovations easy and non-disruptive? Secondary glazing is the perfect solution. It’s very quick to install, meaning minimal disruption to your day-to-day life.

It’s so simple, in fact, that you can even do it yourself. We offer easy-to-install DIY secondary glazing kits that take the stress out of the installation process, so you can sit back and appreciate your secondary-glazed windows in no time at all. Every kit comes pre-assembled, with easy to follow instructions.

As your original window is not disturbed, you don’t need to redecorate. However, you can choose from a variety of frames for your secondary glazing to ensure that it fits with your home design. With many shapes and styles available, you can adjust your secondary glazing to fit your space, not the other way around.

Retain your home’s character

Nothing looks worse on a period property than poorly-made uPVC double-glazed windows. In fact, many listed buildings don’t allow you to make the switch to double glazing at all. But the alternative means sticking with single-glazed windows that let heat escape – and cold air and noise pollution seep in.

Fortunately, there’s another solution. Secondary glazing complements your original windows, providing them with extra thermal and sound insulation, just as double-glazed windows would. Incredibly discreet, secondary glazing lets your windows’ character shine through – and retain all the benefits.

This allows you to keep the old, decorative windows in all their historic glory, without sacrificing modern living standards. When your windows have already lasted centuries, there’s no need to stop them from lasting centuries more.

Secondary glazing offers you value for money

With DIY options available, secondary glazing installation is flexible to meet your needs and budget. What’s more, secondary glazing pays for itself through what you save on your energy bills. Potential energy bill savings can rise to up to 10%, knocking a considerable portion off your bill by the end of the year.


Sound good? Let’s get started

Is secondary glazing any good? As we’ve shown above, it ticks practically every box for your windows – but ultimately it’s up to you. If you think that secondary glazing is the right choice for your property, we can help you find the perfect specifications. Clearview has been supplying and installing secondary glazing for over 20 years. As well as homes, we supply commercial buildings too.

We install secondary glazing within 50 miles of our Sheffield office, or offer DIY kits throughout the rest of the UK. Our decades of experience have helped us hone our range of products and services to make the process seamless.

Use our simple online measuring tool to work out what you need. A long-term investment, all of our windows come with a 10 year guarantee. Email us at  [email protected] with any questions, or if you’re ready, get a free online quote.


Clearview secondary glazing - the solution to significantly improved acoustic and heat insulation to your property, making your home or offices more comfortable, secure, greener and cost efficient to run. Achieved without the disruption of replacement windows, and without damaging the character of your building.

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