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5 Laws That Anyone Working In Secondary Glazing Sash Windows Should Know
Secondary Glazing For Sash Windows

Many homeowners are unable to add new double glazing to their homes due to financial constraints or because they live in listed buildings that restrict any exterior changes.

Secondary glazing for windows with sash is a great alternative and can be installed with a variety of ways.

It is made up of an additional pane of glass within the window frame, which stops cold air from entering your home, while providing insulation and noise reduction.

Fixed Inserts

If you're thinking about secondary glazing for your sash windows, there are many different styles to pick from. Each has its own set of advantages, from improved security to reduced condensation. Which is the best choice for you?

The principle behind secondary glazing is to fit an additional glass pane inside the window frame. This adds an additional layer of insulation and soundproofing, which can dramatically improve the energy efficiency of your home.

It's not always possible to install double-glazed windows particularly if your house is an listed property or you are bound by strict planning regulations that dictate what can and cannot be done to your exterior.

Secondary glazing is a fantastic alternative in these circumstances. It can be set up fairly easily. It's also a popular option for people looking to update their old home without having to tear down the original sash windows and replace them with contemporary ones.

There are a variety of different systems available for secondary glazing sash windows, each of which is configurable to suit the frame you have. The proprietary systems are typically made of painted aluminium frames that fit into the existing depth of the staff bead on the sash window. This lets shutters and sills remain.

They can be fitted using a variety of methods for installation, such as glazing clips or Velcro. These offer a more aesthetic solution than screw-fixed units, and are especially suited for windows that do not need to be opened regularly. Alternately, you can choose an adjustable lift-out unit, which can be lifted out and put back in its place with ease, allowing your windows to be opened.

Horizontal Sliders

Horizontal sliders are the most popular method to enhance the appearance of your windows. They are also quiet and suitable for older homes as well as conservation areas and listed property. They can be installed in most cases without the need for access from outside since they operate from inside.

They are simple to operate using a hand, and can be open wide or left partially open for ventilation. They are very effective at stopping draughts and also have the added benefit of removing harmful UV light. They can be used in combination with a flyscreen to ward off mosquitoes and other insects during summer months.

Our Trackglaze horizontal sliding system provides all the benefits of modern double glazing to your traditional windows made of sash. It is comprised of PVC double sliding track on all four sides of the cavity, a simple brush seal around each sheet of glass and a finger pull angle handle to act as a hand and decrease bowing. It is available in kits of 1m or 2m lengths of track and angle that can be joined to make larger spans.

sash window locks repair basingstoke Repair My Windows And Doors glazing can have a significant impact on noise reduction, particularly for rail, road and airport traffic. The use of laminated glass or toughened glasses further enhances the acoustic performance. Standard secondary glazing reduces outside noise to 52dB (Rw) and special glass, like Stadip Silence Laminated Acoustic Glass, can achieve higher levels of acoustic performance.

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

Vertical Sliders

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

Vertical Sliders were designed for use in sash windows where hinged panels of the regular kind would not be suitable. The system has two secondary sashes, which are fixed one above the other within an outer frame. They are supported by spring balances that allow for ease of movement. The system is available as a face-fixed' (installed to the inside of the window) for improved thermal efficiency or a'reveal-fixed version, which has a glass to glass cavity inside the window reveal, for optimal audio-acoustic performance.

They can be equipped with a variety of stops and handles to meet the needs of the homeowner and can be used to prop open the bottom or top pane to allow for ventilation, or they can be placed in a closed position for added security. They can also be equipped with an insulating bristle seal to prevent draughts.

The 'Choices' Imagine vertical slider secondary glass features all the authentic wood detailing you'd expect to find in a period window treatment. It is available in a range of colors that match your existing sash. It is almost impossible to differentiate from the original sash windows, since details such as sash horns and traditional joints are included in the design. It is available in various sizes and can accept glass up to 6.8mm to provide additional insulation against heat loss. A tilt-in option is also available to allow the sashes to be hinged towards the back of safety stays to help with cleaning.

Hinged Casement

Our single-pane secondary glass can be installed on sash windows of any design, including traditional box sash and casement. Our hinged units are manufactured with a secure multi-point locking system and can be supplied with a key lock handle. This will ensure that the glazed panel is secured and is pulled tightly against the frame, forming a seal to reduce loss of heat. Hinged windows are available as either top or side hung and can also be made by double-glazing. Double-glazed windows provide better performance in terms of acoustics and are available in 43dB (for 47dB), 51dB (for 51dB) or 47dB (for 49dB).

Contrary to horizontal sash windows with movable sashes that slide horizontally within the frame, casement windows can be opened outwards and let in breezes from different angles. They can also be opened from the top and bottom for controlled airflow. They are therefore able to improve airflow and are a great alternative to traditional sash windows.

They are commonly utilized in modern homes as they have small "sightlines" and unobstructed views, but can also be incorporated into listed properties due to the fact that they don't require mullions or transoms. They are also a good choice for hard-to-reach areas because they can be opened by the turn of a handle.

The main drawback of this type of window is that it could block off large openings and limit the use of certain window treatments. They can also be difficult to clean as they swing outward, and could require regular maintenance and service.

Lift Out Windows

Secondary glazing can be put in place by a variety of methods. The cost will differ according to your preference of the materials thickness, thickness, and the type of glass. uPVC frames are the least expensive, followed by aluminium and wooden frames. Specialized glass, in addition to any extra features such as security or sound reduction may increase the cost of windows.

Another factor that will influence the cost is the complexity of the installation. The more complex the project will take longer and more labour will be required. This is also true for heritage properties with more complex design of sash windows.


A good place to start is by assessing the condition of your current windows. You can get an accurate estimate of the cost by having them checked by an expert.

Generally speaking, secondary glazing will have little impact on the overall appearance of your home. Modern FINEO double-glazing features thin and subtle frame lines. This allows you to achieve thermal efficiency without compromising aesthetics.

A very popular choice for secondary glazing is horizontal sliding, which allows easy access to existing sash windows for cleaning or ventilation. These are also available with a tilt feature, which can be activated by opening the catch and lifting your secondary glazing panel vertically up to a certain point. This is a great option for windows that aren't opened frequently and can be used to facilitate access for air conditioning in bay windows. It is also possible to make use of them to open the middle sash on the traditional sash bay windows to give a more symmetrical appearance.

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