A ridge vent is a type of roof ventilation system installed along the peak of a sloped roof. It allows hot air and moisture to escape from the attic, helping to maintain a balanced temperature and reduce the risk of mold and damage. Ridge vents are typically covered with a protective cap to prevent rain and debris from entering. These vents work best when combined with other ventilation systems, such as soffit vents, which allow cooler air to enter the attic. Proper ventilation is essential for extending the lifespan of the roof and improving energy efficiency in homes.