Turbine Roof Vents vs Ridge Vents
When you are considering installing vents on your roof, you might consider either turbine roof vents or ridge vents. The latter are placed onto the ridge of the roof, and then shingles are placed over it to prevent water from entering the attic. Turbine roof vents are placed into a hole cut into the attic roof, and slats on the turbine are turned as the wind passes over them. Both of these vents have advantages and disadvantages.
Turbine Roof Vents
These types of vents are easy to install, and need no electrical connection or after care. They are also considered to be better for the environment than gable vent fans or other electrically-operated vents. Even though they are passively ventilated, they can still move a lot of air, and so long as the wind is up, the turbine is operating.
These vents need a lot more care and consideration, particularly when it comes to laying down roof shingles, and you may need someone to fit them for you. There is also some dispute over how well these types of vents operate, as the ridge vent often sits just below the ridge, possibly inhibiting the movement of air. However, they are better than having no ventilation at all.