We had a hail storm come though the neighborhood recently (about a year or two ago). Probably 75% of the roofs got replaced and most all of them had ridge vents added. I've not heard of any water problems and they sure look a lot better than the turbines.
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Richard Thoms
President - Top Service Pros, Inc.
Connecting Homeowners and Local Service Professionals
http://www.TopServicePros.com