Wind Turbine On Roof Letting In Rain

A single 14 inch diameter turbine vent that is subjected to 15 mph winds can expel up to 1 342 cfm of air.

Wind turbine on roof letting in rain.

Duraflo 6001bl replacement retrofit type b roof vent turbine black. To understand what happens let s first discuss a wind turbine s power curve. As the wind moves across your rooftop it turns these turbines and draws air up out of your attic area. Wind turbines need to protect themselves just as communities do during tropical storms and hurricanes.

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. Turbine vents do indeed look like small wind turbines installed on your roof. Normally when there is wind and rain no water will enter the attic space due to the blades moving around.

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. If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent. 4 4 out of 5 stars 33.

You can bag them but then you risk condensation build up which still gets stuff wet. No additional source of power is needed and turbines are available in a wide variety of sizes and styles. The cut in speed typically between 6 and 9 mph is when the. Reattach any raised portion of the flashing sealing all edges and fasteners with caulk.

You don t have to worry about rain coming in your attic with a whirlybird vent. These are simple metal braces that extend out beyond the spinning turbine. If the flashing is bent or otherwise damaged it could be allowing wind driven rain to penetrate from below. It s a design flaw.

When the turbine is spinning raindrops are deflected off of the spinning surface keeping your attic nice and dry. My home has three whirlybird turbine vents on the roof. With the right wind precipitation combos you will get rain snow in. The diagram below shows the power output of a turbine against steady wind speeds.

And on occasion a hard driving rain with whipping wind will cause roof vents to leak water. Even when the turbine is not being turned by the wind it gives one more exit point for hot air from your attic.