I have some friends with a few roof vents like the one in the attached picture. We had a windy snowstorm over the weekend, and the snow blew right up into the vent and into the attic. He stuffed towels into the vent to block it for now, but what would be a good long-term solution?
It's one attic, about 1200 square feet. It has 3 vents and an exhaust fan. Is that excessive?
The shingle vent II from certaineed has been the best form of attic ventilation we have used, Its baffled and tranfers the most air flow on the market.