Roof ventilation is a very important issue that homeowners don’t think of often. Roof ventilation is based on the simple fact that warm air rises. In the summertime, the sun heats the air in the attic. In the winter, heat from your home warms the attic. In either season, good venting occurs when cold air can enter the attic near the eaves and exit near the peak. The goal is that temperature and humidity levels in the attic space match the conditions outdoors. The best way to fight moisture buildup on a roof is to provide proper ventilation.