Second, warmer air rises, so the hot air in the attic rises to the high vents in the roof. As the warm air escapes, it pulls cooler air from outside through lower vents. Your home probably already has roof vents, but there may not be enough to keep the attic cool. If you want to install additional vents, it would be a good idea to hire a contractor or at least get professional advice. You also can install a fan near the top of the attic to blow hotter air out.
Lower vents allow cooler air into the attic.
Running the fan uses electricity, but it improves ventilation. Ceiling Insulation Insulation can block the flow of heat from the attic into your living spaces. It also keeps heat in your home during the cooler months. You should have at least 10 inches of insulation. You can choose between two types of insulation.