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17 Reasons Why You Should Ignore Secondary Glazing Sash Window
How Secondary Glazing Can Improve Your Sash Window Insulation

If you'd like the advantages of double-glazing, but aren't able to replace your existing sash window, or don't want to do so, secondary glazing could be a suitable option.

It is an affordable option that will add insulation and reduce draughts without altering the appearance of the house. It is also a possibility where it is stipulated in property deeds to preserve the original characteristics.

Insulation that is improved

If your home is older and you have sash windows, it can be difficult to make them as insulated as you'd like. This is usually due to planning constraints or due to the difficulty of altering a traditional window without the risk of losing its distinctive appeal. Secondary glazing is a great solution to improve the insulation of your property. This involves adding a second layer of glass to the frame, thereby adding an extra layer of insulation to keep your property warmer for longer and cut the cost of energy.

The glass pane that is affixed to your existing sash windows serves as insulation, trapping air and heat inside your home. Additionally, the secondary pane helps to block out noise from outside. This is especially useful if you reside in an area that could be extremely noisy, since it can help maintain the peace and quiet within your home.

It is important to remember that even though secondary glazing can improve the insulation of your home however, it will not be as efficient as double-glazed windows. The gap between the two panes does not offer the same level of thermal efficiency as a double-glazed window.

We offer a variety of secondary glazing options that are tailored to your original windows, sash windows, and the requirements of your home. We can design secondary glazing that can be opened alongside the original sash windows, allowing you to benefit from increased energy efficiency without having to give up your beautiful heritage windows.

This kind of solution is particularly popular in listed structures and homes within conservation areas because it allows you to enjoy the benefits of higher energy efficiency without having to compromise on the aesthetics and style of your home. We can achieve a high degree of insulation by using new techniques such as vacuum double-glazing, while still allowing sash windows open.

We also offer a variety of decorative finishes that can match your existing sash window and enhance the look of your home. This includes shutters, blinds, and curtains. They all can enhance the thermal performance of your home by acting as another barrier to block cold air from entering.

Reduced noise

Sash windows are a vital part of many homes. They can be noisy and drafty. Installing secondary glazing is one method to improve the insulation of sash windows. This is an inexpensive option that can boost the efficiency of your home and reduce outside noise. It's also a fantastic option for older homes since it keeps their original design and protects them from intruders.

There are a myriad of designs and sizes of sliding secondary glazing, so you can find the right suitable for your home. Fixed inserts are aluminum frame sections that can be attached to the inside of your existing sash windows. They can be erected permanently or semi-permanently depending on your needs. They're an easy DIY option for homeowners looking to do their own repairs.

A wide range of glass is available, including toughened safety glass as well as laminated acoustic glass. Acoustic glass can be used for secondary glazing to reduce outside noise. It also increases the privacy of your home. This is especially important if you are living close to a busy road or in another noisy location.

Secondary glazing can help reduce the amount of noise pollution and make it easier to unwind in your home. This is also a great idea for pet owners or children, as it will reduce the amount that enters your home. It can also help prevent external noises from disrupting your sleep.

If you live in a historic or listed building, it might not be feasible to install a double-glazed windows without altering the original style of your home. However, you can still increase the energy efficiency of your sash windows by incorporating secondary glazing. It's a durable and cost-effective option that provides many benefits like improved security, reduced noise and better heat retention.

The greatest benefit of secondary glazing is that it can be fitted inside your existing sash window which allows you to keep the charm and character while increasing the insulation and energy efficiency. It's also less expensive than replacing all your sash window with new ones.

Improved aesthetics

A great alternative to replacing your windows that have sash with double glazing, secondary glazing can be added to create another glass pane within the frame. This creates a barrier which reduces heat loss and increases the efficiency of your home's energy usage. It also helps reduce noise levels from outside creating a calm and peaceful environment. It's also a more cost-effective way to improve the insulation of your home, without altering the appearance of the home.

Addition of a second layer of glass to your existing sash windows provides excellent insulation, reducing the loss of heat by as much as 60 percent. This means that your home will remain warmer for longer, saving you money on your energy costs in the long run. It can also help to reduce condensation and black mould as the secondary glass prevents moisture from getting into the window frames made of wood.

There are a myriad of secondary glazing systems that are suitable for various sash windows. Some systems have a sash which can be closed and opened and closed, while others are fixed or are only open for ventilation. There are also options that don't require a mullion or transom which makes them perfect for listed and historic properties. There are a variety of colors and finishes to pick from, allowing you to choose the right design to match your home.


It's a great option for homes with historic or period style which aren't able to replace their sash windows with identical replacements. It's a popular choice for those who live in conservation areas or listed structures where the windows of their home are restricted.

Secondary glazing has a slim viewline, which doesn't block your original sash window. This makes it a great alternative for homeowners who wish to upgrade their sash windows to increase energy efficiency and reduce noise pollution but aren't looking to replace them all.

Reduced condensation

Condensation is a concern with sash window. It occurs when warm air inside the house faces the cold exterior of the window, causing droplets of water to form. This can lead to damp and mould issues in the home. Secondary glazing can solve this problem by creating an additional layer of insulation which prevents heat transfer between the window that was originally installed and the room. This means that you'll be able to keep your home warmer for longer and use less energy, saving you money on heating bills.

A second layer of glass can also enhance the acoustic qualities of sash window. It decouples movement of the sash and the frame and reduces the resonance between the two. This limits sound leakage. The second pane is enhanced in terms of acoustical efficiency using acoustic-laminated or thicker glass.

Sash window secondary glazing is not double-glazed and does not require removal of the old window. It simply adds a second pane of glass to the existing frame. This makes it a great choice for listed buildings and heritage properties, where it's often difficult or unattainable to install new double-glazed windows.

Secondary glazing for Sash windows is available in a range of styles including vertical sliders and hinged casements. These are a popular choice for listed buildings, as they can be installed without mulliations or transoms. This keeps the original look of the window. Repair My Windows And Doors come with a lift-out option to simplify cleaning and maintenance.

For properties that don't need regular ventilation, or where opening the original sash windows could pose a risk A fixed secondary glazing option is available. These can be fitted with a stay to ensure they remain in a minimum height, avoiding the need to manually open the windows manually. In these situations it is recommended to keep track of the humidity levels using a humidistat. Then, you can take steps to reduce moisture in the property. This may include enhancing ventilation, installing a humidifier and addressing any leaks within the building.

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