Stop Wind Driven Rain
Stop Wind-Driven Rain From Penetrating Your Attic Through the Vent
Wind-driven rain causes damage by introducing moisture into your attic from the rain that was propelled by wind through vents, window seals or door seals. In calm weather, raindrops fall vertically, but in windy weather, raindrop paths are angled and the amount of rain striking your home at an angle can be a very destructive source of moisture.
Embers Out vents can help to block wind-driven rain from entering your attic; this is very important as most insurance policies contain limitations of coverage for "wind-driven rain."