I'm posting this in the General Forum, as opposed to the plumbing forum, because I am not convinced that it is a plumbing issue, although at first glance it would appear so.
I live in a house that was built 6 months ago (I live in Ohio). About 3 months ago, I began hearing a jackhammer noise in one wall in my bedroom on the 2nd floor. You cannot hear the noise anywhere else in the house. The noise lasts about 3-4 seconds and goes away. It is never louder or softer and always lasts the same amount of time.
There is absolutely no consistency to this noise. It began 3 months ago and stuck around for a few weeks. Then it went away...then it comes back. It seems to happen more often at night - however, it may happen 75 times a day and it may never happen. There is not pattern to it at all. It is going off like crazy right now, but I hadn't heard it in a few days, and before that I hadn't heard it in a few weeks.
In the past few days, the noise has picked up a lot more. I have not noticed any patterns with regards to the temperature outside (it has happened whether it's 35, 55 or 75 degrees out.) However, it does seem to happen more at night. I also have not noticed any patterns as to whether or not my Heat/AC is on or off.
AND...it does not happen when the water is on or off or recently been on or off. It's happening like crazy as I write this (about every minute) and I haven't had the water on in hours.
The builder has agreed to rip open the wall and take a look at it, but I'd like to avoid that.