What are roof vents for
Roof vents ensure proper ventilation, how ever its possible to over do it. Too much ventilation can be just as bad as not enough ventilation. Roof vents create additional roof penetration, where leaks may occur.
How many roof vents do i need? As a general rule, your roof needs 1 square foot of vent area for every 150 square feet of attic space. Thus, if your attic is 450 square feet, you need roof vents equaling 3 square feet.