Typically, all the disadvantages of plastic windows are manifested in full force after one to two years after installation. The main reasons are known: these are insufficiently qualified installation and poor quality of seals.
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One of the most common defects is the condensation of moisture on the outer surface of the double -glazed window and inside it. This defect is structural, incorrectly calculated resistance to heat transfer profile. It is impossible to eliminate it without replacing the window, or inappropriate.
Moisture condensation on sash and window frame. This defect is associated with errors when placing a window in the wall opening. The masters during installation did not lay the internal slope of the window with a heater. Moisture condensation on the windowsill. Most likely, when installing the window, vapor barrier between the frame and the profile of the lower joint was not qualitatively performed.
It is possible to eliminate the troubles associated with the appearance of condensate by improving ventilation in the room, for example, by installing supply valves. If the owners notice the occurrence of drafts, this means that rubber seals have worn out and it is time to replace them with new.
Cracks and scratches on the window profile indicate the inappropriate quality of the profile, or its improper operation. Shallow scratches are polished. Now it is possible not to reinstalling all the windows to eliminate leaks, replace castings and window sills, replace or adjust the elements of accessories, insulate the slopes again.