Condensation occurs when the indoor relative humidity is high. In windows, condensation occurs because the glass surface has a low temperature. Window condensation problem can be reduced to a certain extent if the homemaker knows the basic cause of the problem. Some of the reasons that increases moisture in the house are excessive water in the sink and the fish tanks are opened, clothes are dried at home, use of gas while cooking, exhaust fans are not used will taking a bath, water is leaking from the walls, excessive use of humidifiers and steamers, floors are wet etc.
Water condensation in vinyl windows can be controlled by reducing the indoor relative humidity or by improving the thermal quality of the window. Condensation can occur in summer and winter. During summer, it will occur on the outside of the window and in winter on the inside of the window. Energy efficient windows can reduce the heat amount moving through the window. Double pane glass, low E coatings and inert gas fill can reduce the heat flow.