Need ideas on how to locate noise in house
There is a noise in my condo that I can not identify. It's a low thumping followed by a banging and floor vibration. After months of this I can not find where the noise originates. Any suggestions?? I thought it was water hammer and had a very expensive system installed and still have the noise. It isn't the furnace or air conditioner. Had both checked. And it happens even when they aren't on. If I go outside I can't hear the noise. It usually starts around 10pm and goes on all night! Need help!