Structural · definition
Tracking a foundation crack's width over time (e.g., with a tell-tale gauge) to judge whether movement is active or stable before choosing a repair.
Source: InterNACHI — Inspecting Foundation Walls and Piers
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The pillar guides set terms like this one in context — what the work involves, what drives its cost, and where it sits in the sequence of a project. Pricing a specific house takes a defined scope and an on-site assessment.