The appearance of moisture on the windows is a fairly common problem. And there are many reasons for this problem and methods of solving. The fact is that as a rule on the window of the window outside the temperature is lower than inside. Cold air rises to the temperature of the “dew point”, and the warm air of the room goes into dew. “Dew” depends on atmospheric pressure, t and humidity.
There may be the following grounds for a low temperature near the window:
If the unscarried walls and slopes, then cold air easily penetrates inside and acts as the basis of condensate. This problem is solved by warming the wall outside.
The reason may be poor -quality work on the installation of the window. In this case, you need to talk with the company-installer and ask to adjust the “jambs”.