Roof vents protect your home from mold and shingle damage. Without them, the warm, humid air in your home will rise and stagnate, causing condensation, moisture buildup, and other problems that can cause your decking to warp or even rot. This can eventually force your shingles up and away from the roof or force you into an early replacement. Discover the roles of intake vs. exhaust vents, installation costs, and how many vents your roof should have.