A neat grout joint hides an incomplete membrane

A fictional wet-area installation has straight tiles and neat grout joints. Before covering the work, an inspection record noted an unresolved membrane connection at a penetration, but that record was not closed. A colleague says the visible grout makes the whole assembly waterproof and proposes handing it over immediately. Another distinguishes the visible finish from the specified continuous water-management system and checks the unresolved item. This written exercise installs no membrane and conducts no flood test. It asks why appearance and grout alone do not establish the intended protection, which records and details matter and how an accountable review should handle concealed-work uncertainty instead of claiming that the finished surface proves compliance.