1) Start inside the building (before you ever get on the roof)
Walk the top floor and look for ceiling stains, bubbling paint, musty odors, or recurring “wet spots” after storms. Note locations (a quick phone map pin helps). Interior symptoms can show up far from the exterior entry point, especially on low-slope systems where water travels.
2) Check drainage like your roof depends on it (because it does)
Clear debris around drains, scuppers, gutters, and downspouts. Standing water is a common precursor to premature membrane aging and leak risk. If water is still ponding long after rain, it’s a red flag to address—don’t wait for a ceiling tile to tell you. (us.sfs.com)
3) Inspect flashings and transitions (the most common leak zones)
Most commercial leaks happen at details: parapet walls, curbs, pipe penetrations, skylights, vents, and terminations. Look for open seams, cracking sealant, metal edge movement, or fastener issues.
4) Look for membrane wear and punctures (especially near HVAC)
Pay extra attention around roof hatches, service paths, and mechanical units. Small punctures or seam issues can be easy to miss until insulation becomes saturated. If your building has regular rooftop service visits, consider adding dedicated walkway pads (or improving existing ones).
5) After wind or hail: document fast, then act
After significant weather, a prompt inspection helps you catch uplift, flashing displacement, and impact damage early. It’s also smart documentation for maintenance records and potential insurance conversations. (professionalroofing.net)