Subsidence cracks can initiate either upstairs or downstairs depending entirely on where the underlying foundation experiences the greatest structural stress or loss of support. Frequently, structural engineers observe that subsidence symptoms manifest on both levels simultaneously, but they often become visible first in ground-floor rooms or external masonry where weight concentrations and shifting earth forces exert the most immediate pressure. Cracks frequently propagate vertically or diagonally near corners, around large ground-floor window openings, or where single-story extensions meet the main two-story structure, eventually traveling upward toward upper-floor bedrooms as the foundational distortion pulls the entire framework out of alignment.
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