How to Repair Roof Leaks

Locate & Fix Flashing, Shingle & Valley Leaks

This guide explains how to find a roof leak (which is rarely directly above the ceiling stain) and how to repair the most common sources: failed step flashing, lifted or cracked shingles, split valley flashing, deteriorated pipe boots, and clogged ridge vents. Includes a step-by-step diagnostic flow from attic inspection through hose-test, plus repair instructions for each leak type. Pair with our Roof Leak Repair Cost Calculator and our Inspection Checklist.