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5 Laws That Anyone Working In Secondary Glazing Sash Windows Should Be Aware Of
Secondary Glazing For Sash Windows

Many homeowners are unable to add new double glazing to their homes, either because of financial limitations or because they reside in listed buildings that prohibit any exterior modifications.

Secondary glazing is an excellent alternative for sash window and can be put in various ways.

This product is a double-paned window that can be placed inside the frame of your window. It is insulated and provides noise reduction, in addition to stopping cold air from entering your home.

Fixed Inserts

If you're thinking of secondary glazing for your sash windows there are many different styles you can pick from. Each style offers distinct advantages including increased security and less condensation. Which one is the best option for you?


The fundamental idea behind secondary glazing is to fit an additional glass inside the window frame. This adds an additional layer of insulation and soundproofing, which can greatly improve your home's energy efficiency.

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

Secondary glazing is a fantastic alternative in these circumstances. It can be set up quite easily. It's a popular option for those who want to update their period home without the need to replace the original sash window an updated version.

There are a number of different options for secondary glazing sash windows, all of can be customized to fit your existing frame. Proprietary systems are generally made of painted aluminum frames that fit into the existing depth of the staff bead on windows with sash. This allows sills and shutters to remain.

They can be fitted using a variety of methods for installation, like glazing clips or Velcro. These are more appealing than screw-fixed units and are ideally suited to windows that do not need to be opened often. You can also opt for a fixed lift-out device that can be easily removed and reinstalled to allow you to open your windows.

Horizontal Sliders

Horizontal sliders are the most sought-after method to enhance the appearance of your windows with sash. They are also very discrete and suitable for older structures, conservation areas and listed properties. In the majority of instances, they can be installed without external access because they are operated by the inside.

They can be operated by hand, and they can be left open or partially opened to allow ventilation. They are effective at preventing draughts, and they also block harmful UV light. They can be used in conjunction with an insect screen to deter mosquitoes and other insects during summer months.

Trackglaze horizontal sliding systems provide all the advantages of double glazing for the original sash window. It consists of PVC double sliding track on all four sides of cavity and a simple brush seal around each glass sheet and finger pull angle handle to function as a hand, reducing bowing. It is available in kits of either 1m or 2m lengths of track and angle that can be butted together to make larger spans.

The acoustic benefits of second glazing are extremely significant and it can significantly improve noise reduction from outside especially railway, road and airport traffic. The inclusion of laminated glass or toughened glasses further enhances the acoustic performance. Secondary glazing that is standard can reduce outside noise by 52dB(Rw) and specialized glass like Stadip Silence Laminated Acoustic Glass can achieve even higher levels of acoustic performances.

It can improve the energy efficiency of your home by keeping your house warmer for longer and reducing reliance on central heating. It's less expensive than replacing the original sash window, and can be installed without having to remove the frame.

Vertical Sliders

Secondary glazing is a cost-effective choice that is typically simpler to manage than a full window replacement. It's suitable for Listed Buildings & Conservation Areas. It's a great way to improve the look of traditional sash windows in Suffolk & Essex while retaining their distinctive character.

Vertical Sliders were specifically designed to be used in sash window applications where hinged panels of the regular kind aren't suitable. The system is comprised of two secondary sashes that are secured one above the other inside an outer frame. They are supported by spring balances, allowing for ease of movement. The system can be placed on the inside of an existing window for better thermal performance or fitted with a cavity between the frame and the glass for optimum acoustic properties.

They can be equipped with a variety of handles and stop strips to suit the homeowner's preferences, propping open either the top or bottom pane to let in air or secured in a closed position for added security. They can be fitted with an insulation bristle to block draughts.

Imagine vertical sliders in 'Choices' secondary glazing features the same authentic wood detailing you'd expect from a vintage window treatment and comes in an array of colours to match your existing sash. It's almost impossible to tell apart from the original sash window with details like the sash's horns and traditional butt joints incorporated into the design. It is available in various sizes and can take glass up to 6.8mm to provide additional insulation against heat loss. A tilt-in option is also available to allow the individual sashes to hinge towards the back of safety stays to help with cleaning.

Hinged Casement

The single-pane hinged secondary glazing can be incorporated into windows made of sash in any style including traditional and casement sash. Our hinged units can be supplied with a keylock handle and are constructed with multi-point locking. This ensures that the glazed panel is held securely in place and pulls close to the frame creating a seal designed to reduce heat loss. Hinged windows are available as either top or side hung and can also be constructed with double-glazed. Double-glazed windows offer enhanced acoustic performance and are available in 43dB,47dB or 51dB.

Casement windows are able to open up and let in breezes at various angles. This is different from a horizontal sash window, with movable sashes in the frame that slide horizontally. They can be opened from the top and bottom for controlled ventilation. For this reason, they can increase airflow and offer an effective alternative to traditional sash windows.

They are commonly utilized in modern homes as they offer a few "sightlines" and unobstructed views. However, they can also be used in listed properties because they do not require transoms or mullions. They can also be used in places that are difficult to reach since they are easily opened by turning a handle.

This type of window can be a problem as it may limit the use of certain window coverings. They are also difficult to clean as they open outwards, and could 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 frames are the most expensive, followed by aluminium and wooden frames. Specialised glass, as well any extra features such as security or sound reduction may also raise prices.

The complexity of the installation will also affect the cost. The more complex the project is, the more time and labour will be required. This also applies to historic properties with more complex sash windows, which require expertise and knowledge.

Assessing the condition of windows in use is a good place to start. You can get a reliable estimate of the cost by having them examined by a professional.

In general secondary glazing has a minimal effect on the appearance of your home. This is due to the fact that the modern FINEO double glazing is slim and discreet frames, meaning you can achieve thermal efficiency without compromising on aesthetics.

A popular choice of secondary glazing is horizontal sliding, which allows easy access to windows that are already sash for cleaning or ventilation. These are also available with a tilt function, that can be activated by opening the catch and lifting the secondary glazing panel vertically up to a certain level. This is a great option for windows that aren't opened frequently and can be used to make it easier to access air cooling in bay windows. wooden sash windows is also possible to use them to open the middle sash of an old-fashioned sash bay window to create a more symmetrical look.