What technological solutions make windows "warmer" and stop the heat escaping and the bills soaring? The level of thermal insulation is positively influenced by the selection of the appropriate thickness of the glazing unit, the type of gas filling the space between the glass panes and the method and the depth at which the glazing unit is set in the window frame. You can get warmer windows by choosing to use warm edge spacer bars, concealed hinges, as well as multi-chamber glazing units in your windows. And that is not all.
Double glazing is nowadays a standard in new windows, be it uPVC, wooden or aluminium. The space between the panes of glass is typically filled with argon. However, triple glazing allows for much better thermal insulation parameters. If the surface of the glass is additionally coated with a special low-emission coating, and a different noble gas (e.g. xenon or krypton) is used instead of argon, even better thermal performance can be achieved.
Your windows will be warmer and more energy-efficient if you decide to use warm edge spacer bars. This solution is commonly used in energy-saving windows. What does it do? Instead of metal, which is a good conductor of heat and cold, plastic bars are used. The material has good insulating properties, which effectively eliminates the risk of creating thermal bridges at the point of contact of the composite glass with the window frame profile. An additional advantage is also the increase in the temperature of the window on the inside. This reduces condensation, and thus the risk of local or general damp and mould growth.
Parameters such as the depth and design of the profile can have a significant impact on the level of thermal insulation provided by the window. Windows that are more than 80 millimetres deep and consist of several chambers (i.e. triple glazed units) are the most effective at avoiding heat loss. However, it is worth remembering that both of these should go hand in hand. Sometimes fewer chambers, but with a deeper profile protect against the cold more effectively than shallow profiles, but with more chambers.
Can window frame profiles be warmer? Yes, as long as they are filled with thermal insulation material. In the production of windows, profiles filled with polyurethane foam or polystyrene foam are used, among others. In energy-saving windows more advanced raw materials, for example aerogel, are used.
The risk of reducing the thermal insulation properties of windows increases with the use of steel elements in them. And hinges are typically made of steel. To improve thermal performance of windows, concealed hinges are often used nowadays. The hinges are “hidden” inside the frame profile, so no thermal bridge is created.