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Secondary Glazing For Sash Windows

Many homeowners are not able to add new double glazing to their homes due to financial constraints or because they reside in listed buildings which prohibit any exterior changes.

Secondary glazing is an excellent alternative for sash window and can be installed several ways.

It's an additional pane of glass within the window frame, which prevents cold air from getting into your home, as well as offering insulation and noise reduction.

Fixed Inserts

There are many different types of secondary glazing for sash windows. Each offers a unique set of benefits, from increased security to lower condensation. Which is the best choice for you?

The basic idea behind secondary glazing is to incorporate an additional glass pane within the frame of your existing window. This adds a layer of insulation and noiseproofing to your home, enhancing its energy efficiency.

However it's not always possible to install new double-glazed windows to your property particularly if you live in a listed building or are subject to strict regulations regarding planning which dictate what can and cannot be done to your exterior.

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

There are a number of different systems available for secondary glazing sash windows, all of which is configurable to suit your frame. Proprietary systems usually have painted aluminium frames which are made to fit within the depth of a staff bead on an existing sash window meaning that shutters and sills are still able to be used.

They can be equipped with a variety of mounting methods such as glazing clips and Velcro. They provide a more attractive alternative to screw-fixed units and are especially suited for windows that do not need to be opened regularly. You can also choose an adjustable lift-out unit, which can be lifted and put back in place with ease to allow your windows to be opened.

Horizontal Sliders

Horizontal Sliders offer excellent thermal insulation and are the most sought-after option for enhancing existing windows with sash. They are also very discreet and ideal for historic structures, conservation areas and listed properties. They can be fitted in the majority of cases without the need for access from outside because they are operated from inside.

sash window repairs barking repairmywindowsanddoors can be operated by hand, and they can be left open or partially opened to allow ventilation. They are effective in keeping out draughts, and also filter harmful UV light. In summer, they can be used with a flyscreen in order to keep out insects and mosquitoes.

Trackglaze horizontal sliding systems offer all the benefits of double glazing for your original sash window. It is comprised of PVC double sliding track that runs across 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 that can be joined to make larger spans.


Secondary glazing can have a significant effect on noise reduction, particularly for rail, road and airport traffic. The addition of laminated or toughened glass further enhances the acoustic quality. Standard secondary glazing 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 boost the efficiency of your house by keeping it warm for longer. This can reduce your reliance on central heat. It is less expensive than replacing your old sash windows and can be installed almost everywhere without the need to remove the existing window or door frame.

Vertical Sliders

Secondary glazing is a cost effective alternative that is usually less expensive than full window replacement and is perfectly suitable for Listed Buildings & Conservation Areas. It's a great option to upgrade traditional sash Windows in Suffolk & Essex while retaining their originality.

Vertical Sliders were specifically designed for sash window applications in which hinged panels from the standard range would not be suitable. The system features two secondary sashes that are secured one over one within an outer frame. They are supported by spring balances, allowing for ease of movement. The system can be purchased as a 'face-fixed' (installed to the inside of the existing window) for improved thermal efficiency or a'reveal-fixed' version which comes with a glass to glass cavity inside the window reveal, for optimal sound quality.

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

'Choices’ Imagine vertical slider secondary glass has the same authentic wood details you'd expect to find in a window covering from the past. It is available in a variety of colours that will match your existing sash. It is almost impossible to differentiate from the original sash windows as details such as sash horns as well as traditional butt joints are included in the design. It's available in an extensive variety of sizes and can accept glass up to 6.8mm to provide additional insulation against loss of heat. A tilt-in option is available to allow the individual sashes to hinge towards the back of safety stays to aid in cleaning.

Hinged Casement

Our single-pane secondary glazing is able to be fitted on sash windows of any style, including traditional box sash and casement. The hinged units we offer can be supplied with a keylock handle and are manufactured with multi-point locking. This ensures that the glazed panel is locked securely in place and pulls tightly against the frame creating a seal designed to minimize heat loss. Hinged windows can be top-hung or side-hung, and they can also be double-glazed. Double-glazed windows provide better performance in terms of acoustics and are available in 43dB (for 47dB) and 51dB (for 51dB) or 47dB (for 49dB).

Contrary to horizontal sash windows which have movable sashes that slide horizontally within the frame, casement windows are able to open outward and capture breezes from a variety of angles. They can be opened from the top and bottom for controlled ventilation. This is why they can improve airflow and offer an effective alternative to traditional sash windows.

They are typically used in modern homes because they offer small "sightlines" and unobstructed views. They can also be fitted into listed properties because they don't require mullions or transoms. They're also a great option for those who live in areas that are difficult to reach as they can be opened with the flick of a handle.

This kind of window could be a problem as it can restrict the use of certain window coverings. They are difficult to clean since they swing outward. They could also require regular maintenance and care.

Lift Out Windows

Secondary glazing can be put in in a variety of ways and the price will vary depending on the type, thickness and materials you select for your panes and frame. uPVC windows are usually the most affordable followed by aluminium, and finally wooden window frames. Specialised glass can also increase the cost, as well as any additional features like sound reduction or security.

The complexity of the installation will also affect the cost. The more complicated the project, the longer and more labour it will take. This is especially applicable to older properties with more intricate designs for sash windows.

Examining the condition of your windows that are in use is a good way to start. You can get a reliable estimate of the cost by having them checked by an expert.

In general, secondary glazing will have little impact on the overall look of your home. This is due to the fact that the modern FINEO double glazing is slim and discreet frame lines, which means you can attain thermal efficiency without compromising on aesthetics.

A popular choice of secondary glazing is horizontal sliding, which allows an easy access to your existing sash windows to clean or ventilation. It is also possible to get them with a tilt function which you can activate by unlocking the catch on the secondary glazing panel and then lifting it vertically to a set point. This is perfect for windows that aren't opened very often. It can be used to provide air conditioning access in bay windows. It is also possible to use them to open the middle sash on the traditional sash bay windows to create a more symmetrical look.

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