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Old 07-08-2014, 12:58 PM   #1
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new roof turbine not spinning


I installed a basic aluminum 12" roof turbine on the back side of a house yesterday but it's not spinning. The turbine on the house next door is spinning, as are a few others down the street but this one isn't. Both houses are standard, single story houses with gable roofs. The turbine spins freely when I turn it by hand, with very little effort, no squeaks, and no resistance.

The hole for the turbine was made about 18-20 inches from the ridge. The top of the turbine is higher than the ridge, to the point that I can stand in the yard of the house across the street and still see it. The turbine on the house next door sits higher than the ridge than this one does, but only by 6 to 8 inches.

I noticed that the house next door does not have any attic louvers while the house I am working on does--one on each end. Could this explain why?

Thanks ahead of time for whatever input is given.

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Old 07-08-2014, 03:13 PM   #2
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new roof turbine not spinning


I've worked on some of those things in the past. They make them real cheap nowadays, imagine that. There is a plastic bushing/bearing the turbine spins on. Sometimes it gets jammed up or broken. I"ve taken them apart and applied a decent enough lube so that it spins again. Not saying this is your situation but it's worth looking into.

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Old 07-08-2014, 04:06 PM   #3
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new roof turbine not spinning


Are there soffit vents? No vents then there not going to work.
If there are soffit vents are you 100% sure there not plugged up with insulation?
You did cut a hole in the roof under it, right?
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Old 07-08-2014, 04:12 PM   #4
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new roof turbine not spinning


Sorry but this is funny!!! No air in= no air out!!
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Old 07-08-2014, 08:58 PM   #5
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new roof turbine not spinning


The turbine depends upon air rising. Air has to be able to come in from the low edge of the roof, the soffit. This means there have to be vents down along under the soffit edge. That and the insulation in the attic needs to be clear of the path the air would take up from those soffit vents.

It's not uncommon for insulation to have been jammed tight out to the edge of the roof. This is a bad thing, because it blocks the air flow. They sell foam channels you can staple to the underside of the room to allow for airflow while still allowing insulation to be installed. But you still have to keep the space between them and the soffit vents clear.

Yes, this is pain in the ass to check and fix. Mind your head, roofing nails sticking through the sheathing are hard on your scalp.
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Old 07-09-2014, 09:50 AM   #6
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new roof turbine not spinning


The new turbine needs hot air to flow out to turn the impellers. The hot air is exiting the roof through the louvers at each end of the roof as they were designed to do. You may have to replace the turbine with an electric fan type of ventilator.
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Old 07-12-2014, 06:25 AM   #7
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new roof turbine not spinning


try wd-40
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Old 07-12-2014, 07:43 AM   #8
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Originally Posted by portbarton View Post
try wd-40
Why? It'd be the wrong lubricant to use in a hot roof situation. That and applying the wrong lubricants in a dusty environment would likely end up causing more harm than good to it.
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Old 07-12-2014, 09:45 AM   #9
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new roof turbine not spinning


Perhaps it is not spinning because it was not needed in the first place.

Your original venting system may be acting as it was intended to.

I have never really understood the need for these things on a residence. Some commercial/industrial applications I understand.


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Old 07-12-2014, 10:18 AM   #10
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new roof turbine not spinning


In the house I built, i had Venta-ridge and continuous soffit vents. However, during hot day of the summer the attic was getting over 140º. I placed one of the turbines into the upper part of the roof and it lowered the temperature almost 40º. It made a big difference in cooling the house.

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