Handmade rock wool sandwich panels are specified for pharmaceutical cleanrooms, GMP workshop wall systems, and high-cleanliness partition walls where surface flatness, airtightness, and A1 fire rating are non-negotiable. However, field failures such as panel bowing, tongue-and-groove air leaks, core density settlement, delamination, and fire-stop gaps frequently derail project handovers. This module converts the five highest-frequency site failures into a QA-grade troubleshooting map for cleanroom GCs, pharmaceutical EPCs, and procurement engineers. SAMZOON, a Foshan source manufacturer, anchors the guide with free pre-bid samples, density verification, and South China cleanroom project QC.