Document what you can see, stop authorizing further work that would conceal the area, and contact a forensic construction expert before the evidence is covered. Many of the most consequential construction defects are concealed — severed or notched structural members, improper electrical splices hidden in walls, crushed or disconnected ductwork, and moisture intrusion behind finishes. Even a licensed contractor can make errors in hidden areas such as inside walls, under flooring, and in attic spaces. Först Consulting Group uses non-destructive tools such as thermal imaging first, and conducts limited destructive investigation only where authorized, so that the condition is properly documented and preserved. Pre-drywall inspection is the ideal stage to catch these issues before they are permanently concealed.