A handmade rock wool sandwich panel is fabricated for pharmaceutical cleanrooms, GMP workshop wall systems, and fire-rated partition walls where flatness, airtightness, and A1 fire continuity are written into the handover file. None of that survives bad field handling. Cumulative plumb drift, unsealed perimeter tracks, angle-grinder burns, exposed rock wool at cut edges, and thermal-bridge fasteners are the five ways a cleanroom GC turns an audit-grade panel into a punch-list liability. This module converts the full site sequence—incoming inspection, moisture-controlled storage, off-site cutting discipline, frame alignment, tongue-and-groove engagement, joint sealing, and perimeter firestop—into a procurement-grade work standard for cleanroom EPCs, pharmaceutical project managers, and overseas purchasing engineers. SAMZOON, a Foshan source manufacturer, anchors the protocol with factory pre-cut openings, node drawings, and South China cleanroom commissioning QC.