Building a house demands many decisions from the owner. They have to decide on the building style, size and equipment, but also on the basic question of creating a basement. Considering that the basement level is another, complete storey and offers additional living space of up to 40 percent, additional costs of around ten percent are rather low. Whether it is a granny flat, a guest room or a hobby room and storage space: planned with foresight, the basement not only offers more living space, it also increases the value of the property if properly executed and equipped.
Those involved in the construction often must take into account the innovations of energy saving guidelines during planning and execution. Since not only the roof and the facades, but also the basement windows are part of the building's shell, these components are particularly important. A house loses about four times more energy through old cellar windows than through cellar windows that are state of the art. Evenmany basement subsidies (eg. with a Uw = 0.95 W/(m²K) for renovation) are exceeded by more than ten percent by the ACO Therm® 3.0 reveal windows.
To achieve such values, the construction of a basement window is crucial. Not only the material and the construction of the window frame (multi-chamber profile), whose share of the window area is between 15 and 35 percent, but also the type of glazing (2- or 3-pane glazing) plays a significant role in the insulating properties of a basement window. Due to the better heat transfer coefficient of a triple glazed pane compared to a double glazed pane, the temperature on the inner pane is significantly higher, so that the risk of mould on the basement window is significantly reduced. Due to the small difference between the interior temperature and the interior surface temperature of the basement window, air currents and cold air lakes are avoided. This increases the feeling of well-being!
