Temporary condensation is a normal function with "Super Glass" windows. When the exterior temperature drops late at night or in the early morning during the humid summer months, dew will form on the exterior of the insulated glass unit just like dew forms on grass, siding or the hoods of cars. Because the exterior pane is so separated from the interior pane of the warm edge glass spacer, its reaction will be the same. The moisture can be even worse if there are plants or shrubs in front of the window since they give off lots of moisture to add to it all. What’s frustrating is that it may only happen on certain windows. The direction it faces, the elevation of the window, and whether or not they are shaded are all factors that can individually affect window condensation. Moisture goes away quickly as the morning sun makes things warmer. Exterior moisture rarely forms in the colder, less humid winter months. A single pane glass window will be much less likely to ever show exterior condensation because it stays directly warmer than the interior temperature of the building. A triple-pane glass window is at least 75% more efficient against heat loss than the original single pane glass, but condensation can still result due to the physical conditions of its surroundings. A new window experiencing condensation The extra measures that Comfort Windows takes to insulate our windows are unsurpassed. They are built to stop heat loss, which is a primary concern in our harsh northern climate. September through December interior and exterior condensations become the nemeses of homeowners when they start to heat their homes. In the fall and early winter, humidity levels are still high inside the house. When outside temperatures drop drastically, they cause the exterior glass to get cold, sometimes causing condensation on the bottom of the interior glass. This usually goes away when temperatures stay low during the middle of winter. If interior condensation continues during winter, it usually means there is a higher than acceptable level of moisture present inside the home, suggesting that ventilation and humidity levels need to be adjusted. Curtains and blinds over the window also stop the interior heat from getting to the glass, which in turn makes it colder. Condensation on the glass when blinds or curtains are first opened in the morning should be expected. It should be noted that no window manufacturers cover against any type of condensation, interior or exterior, and it is specified in their written warranties.