Had a new roof put on about 8 weeks ago. The contractor said I needed additional vents. And he installed ridge vents on the main ridge and down a large dormers ridge. Now I'm getting water stains on my ceilings. He tells me that its from the wind blowing the rain water in the ridge vents. I thinking of having the vents removed if this is the case. The $500.00 cost of the installed vents is not worth all the damage they can cause. I don't understand how a product can be sold if its design can do more damage then it helps?