How Roof Vents Work

Drive nails up through the sheathing and shingles to mark roof air vent locations.

How roof vents work.

Taking advantage of this natural process referred to as passive ventilation is the most common way to vent an attic. From the roof s peak. If there are more than one they are centered between the rafters and installed at regular intervals in a horizontal line along the roof. The majority of roofing experts agree that ridge vents are the most effective and cost effective roof vents available.

Flat roof vents have no moving parts to break or squeak but don t vent as much air as wind driven vents. Why roof ventilation doesn t work specifically for cooling your home down. You will also discover that this product can work by itself to release moisture from the house which is especially useful during the winter months. Roof louvers gable louvers wind turbines and power attic ventilators are all visible exhaust vents that are mounted on the outside of your roof.

Now having said this the whole idea of connecting your home to your roof area to assist with controlling mold inside and extreme heat is a terrible idea for the following reasons. Take for example ridge vents. Like ridge vents roof louvers and gable louvers work without the use of electricity. Wind driven roof vents will pull more air from the attic but only when the wind is blowing.

A few common types of vents used in roof ventilation systems include static vents ridge vents and gable vents. How to install roof vents. Center nails between rafters 18 in. However if you were only going to install 3 or 4 the turbines would be more affordable to you.

If you were to install about 40 feet of roof ridge vent the area would span up to 10 turbines in this case 10 turbines would cost you substantially more to purchase and install. That means you have a lower risk of mold or mildew development. I have roof vents so i have roof ventilation. Static vents come in a variety of different styles and sizes but are all non motorized vents installed near the roof ridge to allow for unobstructed flow of air from the attic.

Mark attic roof air vent locations. Ridge vents run along the peak of a roof. Wind turbines also work without a power source but they work best with a constant source of wind and are not as. What kinds of roof vents are used.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. Non powered roof ventilation can move an almost insignificant amount of air. While hardly anybody agrees on the best roof ventilation system everybody agrees some roof vents do hardly any good at all. Static vents are horizontal openings basically vent covered holes in the roof that allow air movement to take place.

Roof vents will provide about half of the vent area and soffit vents the other half.