Connie without seeing it my guess would be that there was an ice buildup on the metal attic ventilator.
Attic turbine making noise.
Our spinning rooftop turbine vents were squeaking and squealing in the wind.
Climb the ladder remove the access panel and enter the attic.
The noise is a nuisance and usually suggests that the system will seize shortly.
Here s how i did it.
I d wait until the weather warms up and then see if it s still making the annoying racket.
Attic turbines should spin as heat rises.
There are usually no serious performance implications to a seized turbine vent.
Place the stepladder under the attic access space.
I climbed up to the roof to quiet them down with a long lasting wd 40.
How to lubricate roof vents.
Attic turbines are an important component of attic ventilation.
I climbed up to the roof to quiet them down with a long lasting wd 40 specialist product.
Our spinning rooftop turbine vents were squeaking and squealing in the wind.
The spinning turbines pull warm air from the attic more quickly.
Walk back to the attic opening and climb down the ladder replacing the attic access cover on the way.
Improperly ventilated attics can have issues with mold and mildew as well as ice buildup and leaks in winter and can increase home cooling costs in summer.