Benefits Of Installing Secondary Glazing

sash windows installed with secondary glazing

For a long time, many homeowners in the UK have been using double and single glazing techniques in an effort to reduce the noise in their houses among other purposes. However, unknown to them, there is another technique that proves to be much more effective when it comes to meeting the expected performance of a modern-day window.

This technique is known in the UK as secondary glazing, it involves the installation of supplementary glazing on the inner side of an existing window that has been single or double glazed.

This technique is relatively easier and more cost effective to install than replacing your existing windows and you can do on your own at a low-cost budget. However, the advantages of having it professionally installed can be highly beneficial as the windows will be guaranteed for a period of 10 years and will be manufactured to your exact specifications. secondary glazing is highly utilized in the UK amongst listed buildings or residential homes in conservation areas where restrictions and local laws prohibit the alteration of the appearance of the original windows.

Read The Benefits Bellow to see how secondary glazing could improve your living conditions

1. Reduction of Noise

One of the top benefits of this technique is its efficiency when it comes to reducing the amount of noise that finds it’s into your house. It has been shown that employing this method reduces noise by up to 70% -80% as compared to other methods. Given that many homes in the UK suffer from various forms of noise pollution such as traffic noise, planes, traffic, airports and so on, installing secondary glazing to your windows might be the best solution for blocking the noise.

Secondary glazed windows stand among others in the ability to block noise due to a number of factors. One such factor is the distance between the window panes. While double glazing uses sealed gas units that are about 24-28mm apart, secondary glazing uses two pieces of glass whose distance starts from 100mm and above.

The type of glass used also contributes to the level of noise that would be reduced. Usually, this technique uses 6.4mm Laminated glass which translates the reduction of noise by about 40 decibels (dB).

2. Increased Thermal Efficiency

The ability of secondary glazed windows to reduce the heat lost from the house cannot be underrated. One of the top reasons why homeowners replace their existing single-glazed windows is to cut on the heat loss from the house given that windows are the key areas where heat escapes from the house.
Secondary glazed windows work miracles when used as a method of reducing heat loss from the building. The standard 4mm glass used in this method can completely eliminate heat loss through the windows as the independent secondary glazing window system London is completely airtight. With the right installation, this method will keep your house warm during cold seasons and can go a long way in reducing your energy bill and adding value to your home for potential buyers.

3. Cost

Secondary glazing is way cheaper when compared to the replacement of original windows. Take, for example, double glazing. Double glazing requires completely new units for the installation process, the gap between the panes needs to be airtight or filled with inert gas, and of course, you are not a Do-It-Yourself project.

On the other hand, secondary glazing does not require completely new units- it simply involves installing supplementary units on the inside of the existing window panes. Additionally, the project is easy to install and you can do it on your own using a DIY kit or hire professionals to handle it to ensure it is installed to perform to your exact requirements.

4. Convenience

Secondary gazing does not involve replacing your windows. This means that the process is not subject to UK building regulations. As such, you can easily use the method without having to undergo the time-consuming and expensive approval process of building control. However, it’s important to note that if your property is subject to specific building regulations such as href=””>Listed Building Control, you might have to undergo the approval process.

5. It boosts Security of your Home

Secondary glazed windows can also improve the security of your home by offering an additional barrier. It is difficult to open a secondary glazed window from the outside. This means that even if intruders are able to get through the main window (the single glazing), the secondary layer will deter them from entering your house as it will take time to break through. 

Useful TIP: When installing secondary glazing, use hard to break safety glasses e.g. laminated or toughened glasses to improve the security of your windows.

6. Secondary glazing is environmentally Sound

Window glazing helps conserve the environment. This is supported by the fact that the process improves thermal efficiency by reducing heat loss and thus the amount of energy consumed. Also, the uPVC used in this method is produced using aluminum. It is well known that aluminum uses less fossil fuel.Another reason to support the above statement is that the technique, unlike other replacement windows methods, does not encourage throwing away old windows which might contribute to landfill. Instead, it extends their lifespan by addition of a new, secondary layer. What’s more, if you would like to remove your secondary glazing, aluminum is a recyclable material that is in high demand and it would therefore not contribute to the landfill.

7. It promotes a pleasant environment inside the House

The old single glazing method usually provides ineffective seals and may sometimes fail to close properly. This allows cold draughts, ingress, rattles and vibrations, pollen, dust, and other airborne pollutants to enter your house easily. These things might be hazardous to your health. The ideal solution lies in installing secondary glazed windows that provide the most effective tight seals which bar all the above – unwanted materials and sounds from getting into your home.

8. Condensation Control

Condensation on windows is one of the biggest problems faced by many homeowners in most parts of the UK, especially during winter. Luckily, you can eliminate this problem by investing in secondary glazed windows. To help eliminate condensation.

The fact that these panes can be easily removed makes it easy for you to take them off in summer and put them back in winter.


These are the major benefits you can enjoy today if you invest in secondary glazing. With top benefits such as thermal efficiency, reduced cost, noise reduction, and environmental conservation, using this window glazing technique should be the new option for all UK homeowners.

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