@JaneOnceMore I don't know if buildings bigger than houses have these but my mom's house (next door) has a sewer gas vent thing on the roof that spins around. It has gotten rusty and squeaks frequently. It drives me crazy and she can't hear it (hearing loss). It also bothers my nieces when they are here. I wonder if it is something like that? My noise is sometimes there and sometimes not. I'm not a dog but I would want far away from it to pee .