I'm hearing this strange knocking sound from my house whenever it's windy outside. I've checked the perimeter thoroughly and reinforced the gutter, but nothing seems loose. The noise is coming from the mid-section of the house, not above me, so I'm ruling out the roof. There's a corner where a few electrical wires are attached, along with the gutter and a lightning rod, but everything looks secure. I'm looking for any ideas on what could be causing this noise.
4 Answers
Also, are there any drainage pipes for a sump pump or radon system? I had a similar issue before, and it was related to pipes vibrating.
Do you have vinyl or aluminum siding? Sometimes that can cause knocking noises as well, especially if it’s aluminum. It's worth checking that out!
It might be a roof vent that's flapping in the wind, like for a dryer or bathroom vent. Those can make a knocking sound if they're not secured well.

Yeah, my house has aluminum siding!