Imagine waking up so suddenly you sit right up, take off your eye mask and quietly glance around the room without moving a muscle. Then, you hear it: knocking. As you check the clock, you think, “Knocking? At 3:12 a.m.?” It’s perfectly on beat, and you have no idea where it’s coming from. Well, someone might not be going back to sleep.
Knocking house noises explained (and what to do next): In this case, it’s nothing spooky—just the pressure of your home’s pipes moving water around abruptly. Here’s what to do: Turn off your main supply valve and flush the lines by turning on all faucets and flushing your toilets. Once the lines are cleared, turn the valve back on. If that doesn’t solve the knocking, it’s time to call in the pros.
6. Unexplained flushing in every bathroom