I'm not sure where to post this Q. I'm staying on the first floor in a condo. Is it normal to hear "krack krack" sound coming from the ceiling. I only hear it in the bedroom. Even at this hour, 1something. Previously I have never noticed this noise before. It doesn't sound like from upstairs. It sounds more like rodents. But how could this be happening? Any idea what could this noise be? It is so annoying that I cant sleep. I have stayed in condos before, many many, but I have never encountered this noise before. HELP ME!

If your toilet have main hole just open and see what is around there, could it be when above level use toilet?

Hello Jo_da48, it is not the toilet above, because the noise was scattered all over the ceiling the bedroom, and i only managed to sleep at 5am when i switched off the air con, and the noise stopped immediately! hmmm previously i didn't hear this noise when i on the air con. i am still puzzled and it was my first night sleeping there.

Most likely rats. I caught one before at home. Small fella.

After you switche off the aircon, sound stop? have you try turn ON and see is the sound back again?

is your ceiling using aluminium frame? sometime, it may be happen becoz of thermal expansion and contraction (may be)

Your first ninght sleeping there? Ghost?

sounds like rats to me.

look out for yellow patches on the ceiling. that would be their urine.

There is a possibility of the vibration from aircond