Those who want to improve the energy balance of their existing property often think about replacing the windows. Special attention should also be paid to skylights. This is because the frames of old skylights become rotten over time and the glazing does not meet today's insulation standards. Another advantage is that in the course of replacing the skylight, larger windows are installed at the same time and the attic is flooded with more daylight. If you wish, you can also have the window moved and enjoy a wide view.
Basically, there are two types of roof windows. Owners can choose between classic wooden windows with painting or plastic windows. These have the advantage that they do not require repainting even after years and are cheaper than wooden windows. A high quality is offered by plastic windows made of polyurethane with an integrated wooden core. The so-called U-value (heat transfer coefficient) is decisive for compliance with the applicable insulation values. The Building Energy Act (GEG), as well as the Energy Saving Ordinance (EnEv) that preceded it, stipulates a U-value of no more than 1.4 (W/m²K) for new skylights.
Those who replace their skylights can also have the interior cladding replaced at the same time, and thus the insulation as well. In addition, the windows can be moved and replaced with larger skylights. The owners decide whether to use a swing window or a top-hung swing window. Smart-home technology allows the windows to be opened and closed at the touch of a button, and the sunshade can also be conveniently controlled from the sofa.
Source: effizienzhaus-online
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