Secondary Glazing For Sash Windows
Many homeowners are unable add new double glazing to their homes due to financial limitations or because they live in listed buildings that prohibit any exterior changes.
Secondary glazing is a fantastic alternative to sash windows and can be put in various ways.
This is a double-paned glass that fits into the window frame you already have. It provides insulation and noise reduction, as well as stopping cold air from entering the home.
Fixed Inserts
If you're considering secondary glazing for your sash windows, there are a variety of styles you can pick from. Each offers a unique number of advantages, ranging from improved security to reduced condensation. Which is the most effective choice for you?
The basic idea behind secondary glazing is to fit an extra pane of glass within the frame of your existing window. This adds a layer of insulation and noiseproofing your home, improving its energy efficiency.
However it's not always feasible to add new double-glazed windows to your home particularly if you reside in a listed structure or are subject to strict planning regulations which dictate what can and can't be done to your exterior.
timber sash window glazing is an excellent alternative in these situations. It can be installed fairly easily. It's also a popular option for people looking to update their old home without the need to tear down the original windows with sash and replace them with contemporary ones.
There are several different systems for secondary glazing on sash windows. Each can be customized to fit your existing frame. Proprietary systems typically have painted aluminium frames which are made to fit within the depth of a staff bead on an existing sash window, so that shutters and sills can still be retained.
They can be equipped using a variety of installation methods that include glazing clips and Velcro. They offer a more stylish solution to screw-fixed units and are especially suited for windows that don't need to be opened often. Alternately, you can choose a fixed lift-out unit, which can be lifted and put back in its place with ease to allow windows to be opened.
Horizontal Sliders
Horizontal sliders are the most well-known way to improve existing sash window. They are also very discrete and ideal for historic buildings, conservation areas & listed properties. They can be fitted in most cases without the need for external access as they are operated from inside.
They can be operated with a hand and can be left open or partially closed for ventilation. They are extremely effective in eliminating draughts and have the added benefit of removing harmful UV light. They can be used in conjunction with a flyscreen to ward off mosquitoes and other insects during the summer months.
Trackglaze horizontal sliding systems provide all the advantages of double glazing for your original Sash window. It is comprised of PVC double sliding track on all four sides of cavity and a simple brush seal around each glass sheet and a finger pull angle handle to function as a hand and decrease bowing. It is available in kits of 1m or 2m lengths of track and angle that can be butted together to create larger spans.
Secondary glazing can have a significant impact on noise reduction, especially for road, rail and airport traffic. The inclusion of laminated glass or toughened glasses enhances the acoustic performance. Secondary glazing is a standard feature that can reduce outside noise by 52dB(Rw) and specialist 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 is cheaper than replacing the original sash window and can be installed without having to remove the existing frame.
Vertical Sliders
Secondary glazing is a cost effective option that is usually more manageable than a complete window replacement. It's also suitable for Listed Buildings & Conservation Areas. It's a great way to modernize traditional sash windows in Suffolk & Essex while retaining their originality.
Vertical Sliders are specifically designed for sash windows, where regular hinged panels aren't appropriate. They feature two secondary sashes which are secured to one sash above the other, within an outer frame and are supported by sturdy spring balances that allow for effortless movement. The system is available as a 'face-fixed' (installed to the inside of the window) for improved thermal performance or a 'reveal-fixed version, which has a glass to glass cavity within the window's original reveal, for optimum acoustic performance.
They can be equipped with a variety of stops and handles to accommodate the preferences of the homeowner by allowing the top or bottom pane for ventilation or placed in an open position for additional security. They can be equipped with an insulation bristle to block drafts.
The 'Choices' vertical slider secondary glass comes with all the authentic wood detailing you'd expect to find in a period window treatment. It comes in a range of colors that match your existing sash. It's almost impossible to tell apart from the original sash window with details like sash horns and traditional butt joints being incorporated into the design. It is available in many sizes and can be fitted with glass up to 6.8mm for additional insulation against heat loss. The tilt-in feature allows the sashes of each window to be hinged backwards on safety stays for easier cleaning.
Hinged Casement
Our single-pane hinged secondary glazing can be fitted to windows in sash of any design such as casement and traditional box sash. The hinged units we offer are made with a secure multi-point locking system and are available with a key lock handle. This combination ensures the glass panel is secured securely in place and is pulled tightly against the frame creating a seal designed to reduce heat loss. Hinged windows are available either top or side hung and can also be constructed as 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 can open up and let in breezes at different angles. This is different from a the horizontal sash window, which has movable sashes within the frame that slide horizontally. They can also be opened from the top and bottom to offer controlled airflow. They can therefore improve airflow and offer a fantastic alternative to traditional sash windows.
They are typically used in modern homes because they offer small "sightlines" and unobstructed views, but can also be fitted into listed properties due to the fact that they don't require mullions or transoms. They're also a good choice for hard-to-reach areas as they can be opened by the twist of the handle.
This type of window can be a disadvantage because it could limit the use of certain window coverings. They can be difficult to clean as they open outwards. They also may require regular maintenance and service.
Lift Out Windows
Secondary glazing can be installed in a variety of ways and the cost will vary according to the thickness, type and materials you select for your frame and panes. uPVC frames are the least expensive followed by aluminium, and then wooden frames. Specialised glass, as well any extra features such as security or sound reduction could also increase prices.
Another aspect that can affect the cost is the complexity of the installation. The more complicated the installation, the longer and more labour it will take. This is also true for heritage properties with more intricate designs for sash windows.
A good place to start is by assessing the condition of your current windows. A survey by an experienced professional will give you an accurate estimate of what the cost might be.
In general, secondary glazing has little effect on the look of your home. This is due to the fact that the modern FINEO double glazing has slim and discrete frames, meaning you can achieve thermal efficiency without sacrificing aesthetics.
A popular choice of secondary glazing is horizontal sliding, which allows an easy access to your existing sash windows for cleaning or ventilation. It is also possible to get them with a tilt function which is activated by unlocking the catch on the secondary glass panel and lifting it vertically to a set point. This is perfect for windows that aren't frequently opened. It can be used to provide air conditioning access in bay windows. You can use them to open the middle sash of a traditional Bay Window to create a more symmetrical appearance.