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Secondary Glazing For Sash Windows

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

Secondary glazing is an excellent alternative to sash windows and can be installed several ways.

It is made up of an additional glass pane inside the window frame that prevents cold air from getting into your home, while providing insulation and noise reduction.

Fixed Inserts

There are a variety of styles of secondary glazing available for Sash windows. Each has its own set of benefits, from increased security to less condensation. Which is the best choice for you?

The basic premise of secondary glazing is to install an additional pane of glass within your window frame. This adds a layer of insulation and noiseproofing to your home, improving its energy efficiency.

It's not always feasible to add double-glazed windows, especially if your home is a listed property or you are governed by strict planning regulations dictating what can and can't be done to your exterior.

In these instances secondary glazing is a great alternative that can be put in with relative ease. It's a popular choice for those who want to renovate their old home without the need to replace the original sash window with an updated version.

There are many different options for secondary glazing sash windows, each of which is configurable to suit your existing frame. Proprietary systems are generally comprised of painted aluminum frames that fit the existing staff bead depth on a sash window. This allows shutters and sills to be kept.

These can be fitted with different installation methods like glazing clips or Velcro. They offer a more stylish alternative to screw-fixed units and are particularly suited to windows that don't need to be opened often. Alternatively, you can opt for an adjustable lift-out unit, which can be lifted out and put back in place with relative ease, allowing your windows to be opened.

Horizontal Sliders

Horizontal Sliders offer excellent thermal insulation and are the most well-known solution to improve the performance of existing windows made of sash. They are also very discrete and suitable for older buildings, conservation areas & listed properties. In the majority of cases, they are installed without having access to the outside since they operate by the inside.

They can be operated manually, and they can be left open or partially opened to allow ventilation. They are very effective in eliminating draughts and they also have the benefit of removing harmful UV light. In the summer they can be utilized with a flyscreen in order to keep insects out and mosquitoes.

Our Trackglaze horizontal sliding systems offer all the advantages of modern double glazing to your original sash windows. It comprises of PVC double sliding tracks on all four sides of the cavity, an easy bristle seal around each glass sheet and angle handles that can be pulled by fingers to serve as handles and lessen bowing. It comes in kits of 1m or 2m of track and angle that can be stacked together to create larger spans.

The acoustic benefits of second glazing are very significant and it can significantly improve noise reduction from outside especially road, rail & airport traffic. The addition of laminated or toughened glass further enhances acoustic performance. Standard secondary glazing can reduce outside noise to 52dB(Rw) and specialized glass like Stadip Silence Laminated Acoustic Glass can provide even greater levels of acoustic performance.

It can boost the efficiency of your home by keeping it warmer for longer and reducing reliance on central heating. It is 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 easier to manage than full window replacement. It's suitable for Listed Buildings & Conservation Areas. It's a great option to upgrade windows with sash in Suffolk & Essex with modern insulation benefits, while maintaining the charm of older homes.

Vertical Sliders are designed especially for windows with sash openings where standard hinged panels aren't suitable. They come with two secondary sashes which are secured with one over the other, within an outer frame. They are supported by robust spring balances to allow for easy movement. The system can be purchased as a 'face-fixed' (installed to the inside of the window) for increased thermal performance or a 'reveal-fixed version, which is fitted with a glass to glass cavity, within the original window reveal, for optimum acoustic performance.

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

Imagine a vertical slider with 'Choices' secondary glazing features all the authentic timber sash window detailing you'd expect from a vintage window treatment. It's available in a variety of colors to match your existing sash. It's almost impossible to differentiate from the original sash window with details such as the sash's horns and traditional butt joints being incorporated into the design. It's available in a broad selection of sizes and will accept glass up to 6.8mm to provide additional insulation against heat loss. A tilt-in option is available that allows the individual sashes of the frame to hinge into the safety stays to help with cleaning.

Hinged Casement

The single-pane hinged secondary glazing can be incorporated into sash windows of any style, including traditional and casement sash. Our hinged units can be supplied with a keylock handle and are manufactured with multi-point locking. This combination ensures that the glazed panel is securely secured and is pulled tightly to the outer frame, creating a seal to minimize heat loss. Hinged windows are available either side or top hung and can also be made as double-glazed. Our double-glazed windows provide enhanced acoustic performance and are available in 43dB,47dB or 51dB.

Unlike 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 the top and bottom to provide controlled ventilation. Because of this, they can increase airflow and provide an effective alternative to traditional windows made of sash.

They are popular in modern homes due to their slim "sightlines" that allow for unobstructed view, but they can also be incorporated into listed properties because they do not require mullions and transoms. They're also a good choice for hard-to-reach areas since they can be opened with the turn of a handle.

This kind of window could be a drawback since it can restrict the use of certain window coverings. They are also difficult to clean as they open outwards, and may require regular maintenance and servicing.

Lift Out Windows

Secondary glazing can be installed by a variety of methods. The cost will differ according to your choice of materials such as thickness, thickness and type of glass. UPVC windows are generally the least expensive followed by aluminium and then wooden sash window window frames. Specialised glass, as well any additional features like security or sound reduction may increase the cost of windows.

The complexity of the installation will also impact the cost. The more complicated the project, the longer and more labour it will take. This also applies to historic properties with more complex sash and case window repairs windows, which require specialized knowledge and expertise.

A good place to start is to assess the condition of your current windows. You can get a precise estimate of the cost by having them inspected by a professional.

In general, secondary glazing will have minimal impact on the overall appearance of your home. This is due to the fact that modern FINEO double glazing is sleek and subtle frame lines, so you can get the most efficient thermal performance without compromising on aesthetics.

The horizontal sliding secondary glazing option is a popular choice because it permits easy access to the existing sash window to clean or for ventilation. These windows also come with a tilt function, which is activated by opening the catch and then lifting the secondary glazing panel vertically to a specified degree. This is ideal for windows that aren't opened frequently and can be used to allow access to 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 create a more symmetrical look.