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.
Wind is literally air in motion. Because air is free to move, it very readily reacts to forces exerted upon it. The primary driving force for the wind is a difference in atmospheric pressure along a horizontal surface. Atmospheric pressure is the weight of the column of air above an area on the surface. Though invisible (except when there are clouds), air has weight.