No, windows and doors do not cause condensation. Exterior condensation is dew; the same condensation you see on car windows, lawns. and streets on many mornings. Dew on windows is a natural atmospheric phenomenon, and it doesnât mean your windows are leaking air.
Simply put, wind driven rain is damage caused by rain that was propelled by wind through the window seals or door seals. In other words, if the wind was not in the equation, the water would never have made it into the dwelling to cause damage.
An example of a rain shadow. A rain shadow is a dry area on the leeward side of a mountainous area (away from the wind). The mountains block the passage of rain-producing weather systems and cast a shadow of dryness behind them. Wind and moist air is drawn by the prevailing winds towards the top of the mountains, where it condenses and precipitates before it crosses the top.