In fact when i was headed to the last vent i noticed the the others were spinning on their own quietly with only the slightest hint of wind wafting by.
Roof turbine vent stopped spinning.
Find the noisy turbine and apply the lubricant to the moving parts of the turbine.
If it did then it s as if you had some sort of a perpetual motion machine.
These will not rust.
If they spin freely but just sit there when on your roof i d say they aren t level.
Since they are only 4 years old i m guessing they were replacements so maybe the wrong ones were installed not all turbines work with all roof pitches or these just haven t been leveled correctly.
These are located in the track where the pipe coming out of the roof meets the spinning part of the vent.
Not all turbines will fit all roof pitches.
Climb the ladder remove the access panel and enter the attic.
It was very annoying.
You can usually adjust the level by turning the turbine body.
I ambled around the roof shooting wd 40 specialist spray stay gel lubricant into all the vents getting them spinning smooth and easy.
Our turbine roof vents whirlybirds were really noisy and had some rattling that was causing some vibration in the house.
The vents may have obstructions such as insulation or boxes or some other material.
Climb up and take a good look at the turbine vents from the inside.
Place the stepladder under the attic access space.
The turbines are adjustable so that the spinning part is level even though the roof is slanted.
Be sure to lubricate the bearings.
In addition pay attention to the maximum roof pitch that will work with the turbines.
If the vents are blocked by insulation boxes or other obstructions heat will not be able to escape through them and they will not spin.
Put a hole in the roof and the hot high pressure air will move outside to equilize pressure.
Put a roof turbine on that hole it starts spinning but it is blocking the flow of air to the outside not speeding it up.
If you decide to add more turbine vents to your roof be sure to buy ones that are aluminum.
