Secondary Glazing For Sash Windows
Many homeowners are unable build new double-glazed windows to their homes due to financial limitations or because they reside in listed buildings that restrict any exterior modifications.
Secondary glazing for windows made of sash is an excellent alternative that can be put in with a variety of ways.
It's an additional glass pane inside the window frame, which blocks cold air from getting into your home, while offering insulation and noise reduction.
Fixed Inserts
There are many different types of secondary glazing that are available for sash windows. Each has its own set of advantages, from increased security to lower condensation. Which one is the best option for you?
The basic premise of secondary glazing is fitting an additional glass within your 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 install new double-glazed windows for your home particularly if you reside in a listed structure or are subject to strict planning regulations that dictate what can and can't be done to your exterior.
Secondary glazing is a great alternative in these situations. It can be installed relatively easily. It's a popular choice for those looking to update their period home without having to replace the original sash window with a more modern version.
There are many different options for secondary glazing sash windows, each one of which is configurable to suit your frame. The proprietary systems are typically comprised of painted aluminum frames that fit into the existing bead depth on the sash window replacement window. This allows sills and shutters to be retained.
They can be fitted using a variety of methods for installation, including glazing clips or Velcro. They provide a more attractive solution to screw-fixed units and are especially suited for windows that don't need to be opened often. Alternatively, you can opt for a fixed lift-out unit that can be lifted out 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 well-known option for enhancing existing sash windows. They are also discrete and suitable for older homes as well as conservation areas and listed property. They can be installed with the need for external access since they operate from inside.
They can be operated manually, 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 a flyscreen to ward off mosquitoes and other insects during summer months.
Our Trackglaze horizontal sliding system offers all the benefits of modern double glazing to your original windows made of sash. It comprises of PVC double sliding tracks on the four sides of the cavity and an easy bristle seal around each glass sheet and finger pull angle handles that serve as handles and lessen bowing. It is available in kits of either 1m or 2m lengths of track and angle which can be joined to create larger spans.
The acoustic benefits of second glazing are 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 performances.
It can improve the energy efficiency of your house by keeping it warmer for longer. This will reduce the need for central heating. It is cheaper than replacing the original sash window, and can be installed without removing the existing frame.
Vertical Sliders
Secondary glazing is a cost effective option that is usually more manageable than full window replacement and is perfectly suitable for Listed Buildings & Conservation Areas. It's a great way to upgrade traditional sash Windows in Suffolk & Essex while retaining their distinctive character.
Vertical Sliders were developed for sash window applications in which hinged panels from the standard range aren't suitable. They have two secondary sashes that are secured, one over the other, within an outer frame and are supported by strong spring balances to allow for easy movement. The system can be purchased as a 'face-fixed' (installed to the inside of the existing window) for increased thermal performance, or a'reveal fixed' version which comes with an air cavity for glass within the window's original reveal, for optimal sound quality.
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 top or bottom pane for ventilation, or they can be placed in the closed position to provide security. They can also be equipped with an insulating bristle sealing device to stop draughts.
The 'Choices' vertical slider secondary glass features all the authentic wood detailing you'd expect in a period window treatment. It is available in a variety of colors that will match your existing sash. It is almost impossible to distinguish from original sash windows as details such as sash horns as well as traditional butt joints are included in the design. It is available in many sizes and can be fitted with glass up to 6.8mm for additional insulation against loss of heat. A tilt-in option is available that allows the sashes to be hinged towards the back of safety stays to help with cleaning.
Hinged Casement
Our single-pane secondary glazing is able to be fitted on sash windows of any style including traditional box sash style double glazed windows and casement. Our hinged units are manufactured with a secure multi-point locking system and are available with keys and a handle for the lock. This will ensure that the glazed panel is held securely in place and is pulled close to the frame, forming a seal to minimize heat loss. Hinged windows can be top-hung or side-hung and can be double-glazed. Our double-glazed Windows provide enhanced performance in terms of acoustics and are available in 43dB (for 47dB), 51dB (for 51dB) or 47dB (for 49dB).
Casement windows are able to open to the outside and catch breezes from different angles. This is in contrast to a the horizontal sash window which has movable sashes within the frame that move horizontally. They can also be opened from the top and bottom for controlled airflow. They also increase airflow and offer a fantastic alternative to traditional sash windows.
They are commonly used in modern homes due to their small "sightlines" that allow for clear views, however they can also be installed in listed buildings since they don't require mullions and transoms. They can also be used in hard-to-reach places as they can be opened simply by turning a handle.
This type of window can be a disadvantage because it can restrict the use of certain window treatments. They are difficult to clean as they can swing outward. They also may 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 the preference of the materials, thickness, and kind of glass. UPVC frames are the cheapest expensive followed by aluminium, and then wooden double glazed sash windows frames. Specialised glass, as well any other features such as security or sound reduction may also raise prices.
Another factor that affects the cost is the complexity of the installation. The more complicated the project will take longer and more labor will be required. This is also true for heritage properties with more complex sash windows that require specialized knowledge and expertise.
The best way to start is to assess the condition of your existing windows. You can get a reliable estimate of the cost by having them checked by a professional.
In general secondary glazing Sash window glazing has little effect on the appearance of your home. Modern FINEO double-glazing is thin and discrete frame lines. This allows you to get the most efficient heat without compromising aesthetics.
The horizontal sliding secondary glazing option is a popular choice because it permits easy access to the sash window to clean or for ventilation. These are also available with a tilt feature which is activated by releasing the catch and then lifting the secondary glazing panel vertically to a specified degree. This is great for windows that don't open often and can be used to allow access to air cooling in bay windows. You can also use them to open the middle sash of a traditional Bay Window to create a symmetrical appearance.