Mystery Noise Coming from Interior Wall
About 2 months ago we started to hear a strange knocking coming from an internal wall in our house. The knock usually occurs in the middle of the night but sometimes it happens in the evening and sometimes in the morning.
There were here a few theories we had…
1. HVAC expanding/contracting – our neighbors have the same model and have opened this wall up before in their house, no vents
2. Water pipes- again, neighbors report no pipes
3. Expansion / contraction – this is our last idea left but have no way to verify nor anything to fix.
We are able to catch the sound on our cameras so I posted one to this thread. Usually it’s a double knock but sometimes it’s a single one. And ideas on on how more precisely troubleshoot this to work toward a fix would be appreciated!
reference: location is Orange County CA so daytime is usually low 70’s and night is mid to upper 50’s. Basically some of the least extreme temp swings one could
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