Crazy as it sounds your roof breathes. Yes it's true...a roof needs air. Roof ventalation is the flow of air on the underside of a roof. This helps moist air to escape and cooler, drier air to expand in the attic stopping condensation build up in your attic which can damage walls, wood and insulation. Not sure what to look for? Give us a call TODAY...we will walk you through the process. 888-600-NICS #nationallyrecognized #roofing #water #fire #restoration #disastervictimservices