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 harmattan is an intensely dry and dusty wind that blows south off the Sahara. As the wind sweeps over the desert it kicks up huge clouds of dust. That dust creates choking fogs and coats everything in a yellowy dirt. And while the days are hot, the nights turn surprisingly cold â a considerable shock for regions such as southern Nigeria that normally swelter in a hot, humid climate.