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.
The first process is usually over a short duration of time and the damage depends on the intensity of the wind-driven rain (w.d.r). The second process is a more long term one and the damage is related to the total amount of w.d.r. over a longer period.