Roof Turbine Vent Installation Height

Also this will give you general guidelines to follow as you complete your project.

Roof turbine vent installation height.

Most policies in place require about one foot of vent area for every one hundred fifty feet of attic space. A single 12 inch diameter turbine vent could provide a complete change of air in the attic space every 52 minutes if the outside breeze was just 5 mph. This is one of the most important steps. This attic space contains 18 000 cubic feet of air.

If you are going to install multiple vents you need to divide the lengths that you have measured by the number of turbines that you are going to install. This is most effective in areas where winds average at least five miles per hour or otherwise will not offer the most effective reliable source of venting. A turbine vent draws air from inside the attic as wind turns the turbines. Roof cutout decide where to place turbines then from inside the attic drill a hole 18 to 30 down from the roof peak and midway between the rafters put a stick up through the hole to locate it from outside go back on the roof and mark a hole 12 in diameter for a 12 turbine or 14 in.

If you are going to install two vents they should ideally be equidistant from the edges of the roof. How to install turbine vents. These can be ridge vents wind turbines or the flat vents your roofer wants to install. Ft of vent space half dedicated for air intake in the soffits and the other half for exhaust on the roof.

The installation of a turbine vent is nearly identical to a static vent. A third vent should be between the two. Good attic ventilation is important for preventing ice dams in the winter. Attic must have 5 sq.