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.
In areas of wind and rain, building faces are subjected to the wetting by wind-driven rain. In recent years, there is a growing concern on the amount of damage on buildings due to rain water. Unfortunately, unlike other civil and structural engineering problems, it has not been possible to quantify the design data.