There are many types of glazing products available in the market such that you can always get the best product for your home. The thickness of a glass window doesn’t have a huge impact on heat gain coefficient and U-value, but is determines the soundproofing ability and breakability.
Here are some of the most common glazing options available and some of their key advantages:
Low-Emissivity Type of Glass
This type of glass is also known as low-e type of glass. It is basically a type of glass that is coated using a special type of layer to let daylight into a room and limit heat from escaping from the room.
This assists in reducing heat transfer while still redirecting interior heat within the room rather than allowing it dissipate. If you replace non low-emissivity glass with those that have low-e coating, you will reduce the energy consumption in your home by around 50% and reduce heat loss through your windows by around 75%. During colder months, low-emissivity glass retains good amount of solar heat.
Since heat typically moves to a colder area, low-emissivity coating functions by repelling some heat rather than keeping it around the room. Using this type of glass in double glazed windows makes the exterior glass get less heat from the escaping heat.
The interior glass gains more heat than usual as a result of an increase in the retained heat. The end result is cutting down on cold air and condensation on the double paned window.
Therefore, low-emissivity glazing is worth considering since it stops heat loss such that a room remains warm during winter.
Colored glass offers some difference in heat gain coefficient and visible transmittance. This won’t impact a lot on the U-value although it will depend on the color used for toning.
Grey and bronze colors reduce infrared radiation and visible right. Green or blue color allows in more radiation and visible light.
Toned glass is especially important for windows which get too much direct sunlight and you want to reduce the sunlight without having to block the outside view with curtains or shutters.
However, a key drawback that comes with this form of glass is allowing little light to pass through during dark winter months. Hence, they are not ideal where you want to enjoy a lot of sunlight indoors during winter.
This glass is very desirable when used in double paned windows. Super-toned panels are very effective as they absorb some solar heat and keep a room cooler during hot days. This glass also comes with the benefit of blocking out more UV radiation than what standard toned glass can block.
This type of glazing involves using a very thin plastic later between two glass panes. The main purpose of this layer, also known as the interlayer, is to enhance the strength of glass and prevent it from breaking into dangerous pieces.
The lamination layer holds the shards together in case the glass breaks. As such, another name used in place of laminated glass is safety glass. It is commonly used in side panels, glazed doors, shelving units, store windows, skylights, side panels, kitchen cabinets, bathroom shelving, and glass partitions.
Laminated glass reduces noise, enhances security, reduces UV radiation, and its installation process is easy. Regular glass can shatter easily and the sharp shards pose a great danger.
However, laminated glass boasts of resisting impact and it is ideal for overhead glazing. This glass is also suitable in areas that may experience break-ins since it is resistant to smashing.
This glass also reduces noise from entering or leaving a room. It also reduces UV radiation that may enter a room. UV rays tend to fade carpets, artwork and furniture.
Hence, they reduce the lifespan of such household items. Laminated glass is applicable in almost any glass such as sheet glass, float glass, toughened glass, bent glass, fused type of glass, wired glass, glass, and patterned glass.
You can also opt to go for secondary glazing instead of installing a brand new insulated glazing unit. This type of glazing involves adding a glass sheet or transparent acrylic on the interior side of the frame or a moveable window sash powered by a magnet system or housed within a secondary frame.
Although this glazing option does not offer an airtight space like in double glazing, the air pocket reduces U-value and air flow. Double glazed windows are more effective in reducing heat gain and heat loss than secondary glazing. However, secondary glazing is efficient in reducing energy transfer.
It is also considered more affordable than double paned windows since it is easy to install on existing windows, such that you will not have to install new windows.
This option is more efficient in reducing external noise than double paned glass windows since the space between the main glass and the secondary glass is wider.
You can install this type of glazing on your own, unlike in the double glazed option where you would have to hire a professional installer.
You can also add an insulation film to an existing window or a double paned window to reduce heat gain. For instance, installing a cling film onto single paned windows can assist in reducing energy loss since it blocks energy transfer.
It also blocks draughts that may come through window frames that are poorly fitted. Adding insulation films is one of the most affordable substitutes for double pane windows.
Polythene films are also an ideal choice of glazing films. They are DIY friendly and they can be used on an existing window. This makes films an ideal choice for glazing in rental houses since you will not require permission from authorities or the property owner.
However, their major drawback is that you will be unable to open the window unless you remove the film. Hence, you will always have to remove the film whenever you want cool air to enter the space during a warm day.