Wind Turbine On Roof Letting In Rain

But some roof air vents sit fairly flat to the roof with a mushroom style hood and unprotected sides.

Wind turbine on roof letting in rain.

It s a design flaw. If you want the strongest turbine vent be sure to buy one that has external braces. These are simple metal braces that extend out beyond the spinning turbine. To understand what happens let s first discuss a wind turbine s power curve.

My home has three whirlybird turbine vents on the roof. If the flashing is bent or otherwise damaged it could be allowing wind driven rain to penetrate from below. Reattach any raised portion of the flashing sealing all edges and fasteners with caulk. The wind that almost always accompanies a rain shower or storm actually causes the turbine to spin and blow rain drops away from the vent.

No additional source of power is needed and turbines are available in a wide variety of sizes and styles. When the turbine is spinning raindrops are deflected off of the spinning surface keeping your attic nice and dry. You don t have to worry about rain coming in your attic with a whirlybird vent. Normally when there is wind and rain no water will enter the attic space due to the blades moving around.

As the wind moves across your rooftop it turns these turbines and draws air up out of your attic area. However when there is rain and no wind water can enter the attic and land on the insulation since the blades are not moving. This is one of my issues with turbine vents. If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent.

Duraflo 6001bl replacement retrofit type b roof vent turbine black. Turbine vents do indeed look like small wind turbines installed on your roof. The cut in speed typically between 6 and 9 mph is when the. Even when the turbine is not being turned by the wind it gives one more exit point for hot air from your attic.

A small 12 inch diameter turbine vent with a constant wind speed of 5 miles per hour mph can remove 347 cubic feet of air per minute cfm from the attic space. The same is true for snow. A single 14 inch diameter turbine vent that is subjected to 15 mph winds can expel up to 1 342 cfm of air. You can bag them but then you risk condensation build up which still gets stuff wet.

The diagram below shows the power output of a turbine against steady wind speeds. Wind turbines need to protect themselves just as communities do during tropical storms and hurricanes.