What should I compare before assuming the source is in the Foundation? The safest answer begins by recording location, trigger and timing before assigning a cause.
What the question is testing
Loads, soil moisture, drainage, freeze-thaw and material movement converge at the house-to-ground boundary. The question becomes more useful when it separates what happened first from what was noticed later.
A practical comparison
Record uneven floors or sticking doors together with weather, occupancy or system cycles. Repeat the observation only under safe, comparable conditions and note what stayed unchanged.
Limits and next step
Rapid movement, displacement, bulging, loss of bearing, flooding or damage after impact requires structural or geotechnical assessment instead of prolonged home monitoring. Use the connected atlas guide to build a bounded evidence packet and a clear professional handoff when needed.
