What is Secondary Glazing?

Secondary glazing is a process where you install an additional pane and frame inside your window. This secondary frame acts like double glazing in providing insulation, noise reduction, and extra security. This is a great way of improving the performance of your house.

In fact, secondary glazing can lower your energy bills by up to 10%. As a result, you also keep your expenses low.

This is also a fantastic way of improving the thermal performance of heritage buildings. Building authorities regulate the appearance of these properties. They cannot have external fittings that take away from their traditional facade.

Since most such properties have single glazed windows, secondary glazing comes in handy. You see, single glazed windows are notorious for losing heat. This means you need to use more heating for longer to warm them. However, with secondary glazing, you get the insulation that double glazing would provide. Moreover, it will not affect how your home looks from the outside.

What Are the Benefits of Secondary Glazing?

Insulation and Lowered Energy Bills

After double glazing and triple glazing, secondary glazing is the best way to insulate your home. The seal between your windows and the second pane is not as air-tight. However, it does provide a standing cushion of air. This layer of static air stops heat from escaping out. As a result, you get a lower U-value on your windows.

U-value is a measure of how much heat your windows are losing. A lower U-value means your windows are letting less heat escape. In this manner, your windows help in warming up your home.

Additionally, by trapping the warmth in, your windows lessen the load on your central heating as well as air conditioning. Either way, the windows maintain the internal temperature. As a result, your property does not consume as much power.

This lower energy consumption results in lower energy bills. In essence, your secondary glazing helps you save money on electricity bills.

Noise Reduction

Single glazed windows are highly ineffective at keeping noise out. In fact, they may even be amplifying outside sounds. Secondary glazing prevents this. The cushion of air that insulated the heat also helps dampen sounds. As a result, no matter how noisy it is outside, your home remains largely peaceful and quiet. You don’t even have to invest in expensive sound proofing.

Added Security

An additional layer of glazing helps enhance the security of your property. The frame and pane add another layer for an intruder to break through. By using sturdy frames and glass, you make it twice as difficult for someone to break in. As a result, the security of your windows effectively doubles.

No Impact on Outer Appearance

The best part about secondary glazing is that it gives you all these features without affecting the appearance of the property. This is especially useful for owners of heritage properties and properties in conservation areas. For such buildings, the building regulations have strict rules. They cannot have any changes to the outer appearance that take away from their traditional architecture.

As a result, they need to maintain the same style of windows as the original ones. Moreover, the material should also be the same, or at least appear to be the same. For example, if you have a heritage property, it may have single glazed wooden windows. In such a case, you cannot replace them with uPVC double glazing.

As we saw earlier, single glazing is highly inefficient at retaining heat. Secondary glazing is a simple and affordable solution. You don’t even have to replace your windows to get better heat performance!

Why Do I Need Secondary Glazing?

Improve Performance of Your Home

As we have seen thus far, this addition is a quick and easy way of improving the performance of your home. Simply install an additional layer over your old windows. Just like that, your home becomes warmer, quieter, and more secure.

Lower Cost than Double or Triple Glazing

If you wanted to improve your property’s performance, the alternative would be to install double or triple glazing. Both these options can be quite expensive. Moreover, certain properties may not get these due to regulations restrictions.

Design Options to Fit Your Windows

You can get secondary glazing in a variety of design and colour options. Moreover, you can adapt them to fit any window style. This includes the sliding sash windows that are the most popular style for heritage properties. You can have hinged glazing or even liftout glazing if you need unhindered access to your windows.

What is the Difference Between Double Glazing and Secondary Glazing?

Double glazing is a sealed window component. It is made of a frame and a sealed glass unit. The sealed unit contains two panes of glass with a tightly sealed space between them. This space may be filled with a gas like argon or simply air.

Secondary glazing, on the other hand, is an extra panel separate from the main window. It is not as difficult to install. In fact, you might be able to do it yourself. As a result, it costs less. It is also not regulated by building laws. This means you are not obliged to get permission or a certificate for this installation.

Who is Secondary Glazing Useful For?

Heritage Property Owners

Heritage property owners benefit the most from secondary glazing. This fitting improves the performance of the property dramatically. However, it does not affect the facade in any way. This is especially useful for heritage hotel buildings and schools. These establishments need to ensure regulation ventilation as well as the comfort of the inhabitants.

However, since they can’t get modern double glazing, this can be difficult. Secondary glazing is an easy way to get around that problem. It improves the thermal performance as well as noise reduction. Moreover, you can install ventilation so that there is ample air and no condensation on the panes.

People with Limited Budgets

If you want a warmer home with lower bills, the price of double glazing may put you off. Triple glazing can be even more expensive. Thus, if you want better performance on a budget, secondary glazing may be the right choice for you. You don’t have to worry about uninstalling old windows or the cost of new windows. Simply get a discreet pane behind your existing windows. Once installed, you can enjoy your warm and secure home!

How Can I Get Secondary Glazing?

Secondary glazing may not be available as an option with all double glazing companies. However, if you want secondary glazing for your home, we can help you. Send us a mail through our contact form. Someone from our team will get back to you with the details of companies offering secondary glazing near you.

Frequently Asked Double Glazing Questions

Frequently Asked Double Glazing Questions

Do UPVC Windows Need Trickle Vents?

Trickle vents are not a requirement, however they do offer additional ventilation without the need for opening your windows so can be a valued add on.

How Long Will It Take To Install My Casement Window?

Because every job is different, it is best your talk to your double glazing installer who will be able to give you an exact timescale.

Are There Other UPVC Casement Window Styles?

Other UPVC casement window styles include the French casement window which is a more traditional take on the standard casement style.

Will I Have A Choice of Casement Window Locks?

A high security lock will be fitted as standard with your new casement window but your double glazing installer will also offer a choice of security upgrades.

What Are Flush Casement Windows?

Flush casement windows are where the unit sits flush to the frame, creating a super sleek look.

Are There Different UPVC Casement Window Sizes?

UPVC casement windows come in a wide range of sizes to suit your property. You can specify your casement window size in our window cost calculator to get a unique window price!

Can I Choose My Casement Window Handles?

Your double glazing installer will offer you a choice casement window handles and casement window hardware options so you can achieve the perfect look.

What is a Casement Window?

A casement window is attached to its frame by one or more hinges. A casement window is hinged at the side allowing them to open extremely wide. These windows can double up as emergency exits and are perfect for hard to reach places within the home, with many home owners installing these windows behind their kitchen sinks.

Where Can I Get A Tilt and Turn Windows Price?

You can get a tilt and turn windows price using our window cost calculator which will give you a free and unique quote within a matter of minutes.

How Does The Tilt and Turn Window Mechanism Work?

The tilt and turn window can be ‘tilted’ inwards due to its unique turning action which allows the window to be easily accessed from both inside and out. All it takes is a swift turn of the handle.

How Much Do French casement windows cost?

The cost of French casement windows will vary depending on installer but you can get an average casement windows cost using our free online quoting engine

How do UPVC Sash Windows Work?

UPVC vertical sliding sash windows are built to either slide vertically downwards or upwards. This opening function makes the UPVC sash window much easier to use compared to traditional wooden windows where the only choice is double hung and single hand.

Are UPVC Sash Windows Easy To Use?

UPVC sash windows are very easy to use. Their spiral balance mechanism allows for smooth operation so you can open and close your windows with ease. UPVC sash windows are also incredibly low maintenance and require very little cleaning.

Why Should I Choose a UPVC Sash Window?

UPVC sash windows are incredibly attractive and make a stunning addition to any property and are relatively low maintenance thank to their UPVC design. You can enjoy a traditional aesthetic for many years to come thanks to their long standing properties.

Replacement Sash Windows In A Conservation Area

If your home is a listed property or within a conservation area then you will need to seek planning permission.

Bay or Bow Window?

Simply put, it really depends! Bay windows offer often much welcome and useful extra storage space to the frontage of homes. On the other hand, bow windows provide a curved shape alternative in terms of look compared to bay windows. They are both beautiful options and can add much character and charm to the right property.

Can Bay Windows Look Modern?

Bay windows can easily be either modern or traditional depending on the combination of glass and / or coloured uPVC profiles now available. Subsequently, its easy for these windows to seamlessly blend in with contemporary or old properties.

What Makes Flush Sash Windows Different?

Flush sash casement windows are specifically designed to imitate the appearance of traditional wooden timber windows by appearing to have the same sashes that finish 'flush' with the outside face of the window.

Should I replace my old sash windows?

Sash windows are a key feature for many traditional period buildings. Sash windows were traditionally built using timber, which is fairly high maintenance and has a tendency toward rotting and warping. Over time, these windows can become draughty and insecure. uPVC sash windows are a great way to experience the benefits of modern double glazing, without sacrificing the aesthetic of your home. uPVC sash windows will not rot or warp and require little maintenance. They are also thermally efficient, which means that your home will not require as much heating.

How much does sash window restoration cost?

The cost of sash window restoration will depend on the survey result. Standard draught proofed sash windows (without sill replacement) usually starts at about £500 per window. The time taken will also depend on the survey result.

Can I install double glazing into my original sash windows?

This will depend upon what type of window you have. Replacing existing moving sashes with new, double glazed replicas might to be possible.

How much does it cost to replace a sash window?

The cost of replacing a sash window will depend on many factors including: style, size, material and glazing. A wooden sash window will cost significantly more than a uPVC sash window. A wooden sash window can cost up to £1000. Wooden windows are more expensive to manufacture so expect to pay that bit more. uPVC sash windows can be designed to mimic wood and are much cheaper in price. The starting price for a standard uPVC sash window is on average £525.

Secondary Glazing Prices