Installation Details · FAQ

Do ridge vents leak in heavy rain or driven snow?

Modern external-baffle ridge vents (the kind Trill installs) handle driven rain and snow without leaking. The internal baffle creates a chamber that traps airborne water before it reaches the deck slot, while the external baffle deflects upward-driving rain away from the vent opening.

The older ridge vent designs from the 1990s and earlier do leak in horizontal rain — those are typically replaced during a re-roof anyway. Trill’s standard product (GAF Cobra IV or similar) has a documented zero-leak performance up to 110 mph driving rain in lab testing, and our field record on installed homes matches that. Driven snow is also handled by the baffle design; snow doesn’t pack into the vent opening the way it does on the older designs.