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Secondary Glazing Sash Windows Isn't As Tough As You Think
Secondary Glazing For Sash Windows

Many homeowners are unable to build new double-glazed windows to their homes, either because of financial constraints or because they reside in listed buildings that prohibit any modifications to the exterior.

Secondary glazing for sash windows is a good alternative that can be put in in various ways.

This product is a double-paned glass that fits into the window frame you already have. It is insulated and provides noise reduction, as well as stopping cold air from entering the home.

Fixed Inserts

If you're considering secondary glazing for your sash windows, there are several different styles you can pick from. Each style has its own set of benefits that range from increased security to reduced condensation. Which is the best choice for you?


The fundamental idea behind secondary glazing is fitting an additional pane of glass within the window frame. This provides an additional layer of insulation and noiseproofing to your home, improving its energy efficiency.

However it's not always possible to add double-glazed windows for your home particularly if you reside in a listed building or are subject to strict regulations regarding planning which dictate what can and can't be done to your exterior.

In these cases secondary glazing is a fantastic alternative that can be put in with ease. It's a popular choice for those looking to renovate their old home without having to replace the original sash window with an updated version.

There are sash window renovation www.repairmywindowsanddoors.co.uk for secondary glazing on Sash windows. Each can be adapted to fit the frame you already have. Proprietary systems are generally constructed of painted aluminium frames that fit into the existing staff bead depth on a sash window. This allows shutters and sills to be retained.

They can be equipped with a variety of mounting methods, including glazing clips and Velcro. These offer a more aesthetic solution to screw-fixed units and are especially suited for windows that do not need to be opened regularly. You can also choose a fixed lift-out device that can be easily lifted out and reinstalled to open your windows.

Horizontal Sliders

Horizontal Sliders provide excellent thermal insulation and are the most sought-after solution to improve the performance of existing windows with sash. They are also quiet and are ideal for historic homes, conservation areas & listed properties. They can be fitted in the majority of cases without the need for external access because they are operated from inside.

They are easy to operate using a hand, and can be opened wide or left partially open for ventilation. They are very effective at stopping draughts and also have the added benefit of filtering out harmful UV light. In summer, they can be used with a flyscreen in order to keep insects out and mosquitoes.

Our Trackglaze horizontal sliding systems offer all the benefits of modern double glazing to your original sash windows. It consists of PVC double sliding track on all four sides of the cavity with a brush seal around each sheet of glass and a finger pull angle handle to function as a hand and decrease bowing. It is available in kits comprising either 1m or 2m lengths of track and angle which can be butted together to create larger spans.

Secondary glazing can have a significant impact on noise reduction, particularly for rail, road and airport traffic. The addition of laminated or toughened glass further enhances the acoustic quality. Secondary glazing that is standard reduces outside noise to 52dB (Rw) and special glass, like Stadip Silence Laminated Acoustic Glass, can achieve even more impressive levels of acoustic performance.

It can increase the energy efficiency of your home by keeping your house warmer for longer and decreasing dependence on central heating. It is less expensive than replacing your sash windows and can be installed without the need to take out the window or door frame.

Vertical Sliders

Secondary glazing is a cost-effective choice that is typically simpler to manage than a full window replacement. It's also suitable for Listed Buildings & Conservation Areas. It's an excellent way to modernize traditional sash windows in Suffolk & Essex while retaining their originality.

Vertical Sliders are specifically designed for sash windows, where regular hinged panels aren't suitable. The system is comprised of two secondary sashes that are secured one over the other within an outer frame. They are supported by spring balances that allow for ease of movement. The system can be placed on the inside of an existing window for more efficient thermal performance or equipped with an opening between the frame and the glass to ensure the best acoustic performance.

You can pick from a variety of stop-strips and handles to meet your needs. They can be positioned in the closed position for extra security or propped open for ventilation on the glass's top or bottom. They can be equipped with an insulating seal bristle to prevent drafts.

'Choices' Imagine vertical slider secondary glazing comes with the same authentic wood detailing you'd expect from a vintage window treatment. It's also available in an array of colours to match your existing sash. It's almost impossible to differentiate from the original sash window, with details such as sash horns & traditional butt joints being incorporated into the design. It is available in various sizes and can accept glass up to 6.8mm for additional insulation against loss of heat. The tilt-in option allows the sashes of each window to be hinged backwards to make it easier for cleaning.

Hinged Casement

Our single-pane secondary glazing is able to be installed on sash windows of any design, including traditional box sash and casement. The hinged units we offer can be equipped with a keylock handle, and are constructed with multi-point locking. This combination ensures that the glass panel is securely secured and is pulled tightly to the outer frame, forming a seal to minimize heat loss. Hinged windows can be top-hung or side-hung and can be double-glazed. Double-glazed windows are a great way to improve sound insulation and are available in 43dB,47dB or 51dB.

In contrast to horizontal sash windows with movable sashes that slide horizontally within the frame casement windows are able to open outwards and catch breezes from various angles. They can also be opened from both the top and bottom to offer controlled ventilation. They can therefore increase airflow and offer a fantastic alternative to traditional sash window.

They are typically employed in modern homes since they offer small "sightlines" and unobstructed views. However, they can also be incorporated into listed homes because they do not require transoms or mullions. They're also a great option for those who live in areas that are difficult to reach as they can be opened by the turn of a handle.

The primary drawback to this kind of window is that they can block off large openings, and could limit the use of certain window treatments. They can be difficult to clean, as they open outwards. They could also require regular maintenance and service.

Lift Out Windows

Secondary glazing can be installed by a variety of methods. The cost of installation will vary depending on your preference of the materials such as thickness, thickness and type of glass. uPVC windows are usually the most affordable followed by aluminium, and finally wooden window frames. Specialized glass may also increase the cost and include additional features such as security or noise reduction.

Another aspect that can affect the cost is the complexity of the installation. The more complicated the installation, the longer and more labour it will take. This also applies to historic properties with more complex sash windows that require specialist knowledge and expertise.

Analyzing the condition of existing windows is a good place to start. You can get an accurate estimate of the cost by having them inspected by a professional.

Generally speaking, secondary glazing will have little impact on the overall look of your home. Modern FINEO double-glazing is slim and distinct frame lines. This allows you to improve thermal efficiency without sacrificing aesthetics.

The horizontal sliding secondary glazing option is popular due to its easy access to the sash window to clean or for ventilation. These are also available with a tilt function, which is activated by releasing the catch and raising your secondary glazing panel vertically up to a certain point. This is ideal for windows that don't open often and is a great way to make it easier to access air cooling in bay windows. It is also possible to use them to open up the middle sash of the traditional sash bay windows to create a more uniform look.

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