How should warehouse roof zones be mapped?
Mark building bays, loading doors, roof elevations, drains, skylights, penetrations, and additions. Warehouse and depot buildings may use different metal or membrane systems, insulation, and attachment details. Inspect each assembly independently. Record what is visible, what could not be reached, and which areas need owner-approved testing. Do not assume a long uninterrupted roof has a single slope or drainage pattern.
When a leak is reported, compare it with the known roof slope, building bay, and any roof-to-wall connection. Photograph wetting or corrosion only where permitted. A surface patch can hide a loose fastening or open lap, so identify the attachment issue before selecting a repair. If the building includes multiple roof levels, mark how water crosses between them and which drains serve each section.
Check seams, fasteners, ridge and eave details, wall transitions, curb flashings, and previous repairs. A repair scope should tie the observed condition to a marked zone, material, limit, and required follow-up. If the site has storage or logistics operations, avoid describing their contents or layout in the roofing report; document only the protection and access requirements authorized for the work.