The weird part of the story is that I called the warranty manager the next day, played a bit of phone tag for two days, and finally got a hold of her. She quickly contacted the home builder, who then contacted me and knew exactly what the problem was when I described it. That's a bit odd, I thought to myself. So I knocked next door to see if my neighbors had any issues with water leaks. Amber (my neighbor) told me that the same thing happened to her place two years ago and that they came in to fix it.
If the home builders knew well ahead of time that this could have been a potential issue for all of us, they should have contacted us a long time ago, to avoid any other possible damage. In my case, some of the boards in my hardwood floor have started to buckle due to the water the boards absorbed. BASTARDS!
So today, on my day off, I'm stuck at home listening to all the noise. It gives me a good excuse to clean my room, though, before the new year and to finish up some work.