This practical guide shows homeowners how to turn a late-night roof leak into a managed repair. Chapter One covers interior triage: protect the room, drain a bulging ceiling safely, trace the water path through the attic, and log photos and moisture readings. Safety rules are strict—dry roof only, correct ladder angle, three points of contact, and clear limits on what a DIYer should attempt. Chapter Two teaches targeted quick fixes on asphalt-shingle roofs. You clean and reseat lifted tabs, deal with nail pops, seal split vent boots, and close micro-gaps at step flashing using thin, roof-rated materials. When storms threaten, you deploy a ridge-to-eave tarp using battens. A controlled hose test, run in narrow bands with a partner inside, confirms the repair and ties cause to effect. Chapter Three handles stubborn or recurring leaks and converts one patch into a care plan. You diagnose underlayment issues, flashing geometry faults, ice-dam symptoms, and condensation look-alikes. A seasonal checklist for inspection, gutter care, and ventilation keeps water pathways clear. The guide ends with firm lines for calling a pro and a simple documentation bundle for insurance or warranties. Result: a safer workflow, a verified fix, and a season-ready roof.