Locate the leak source
Inspect the roof from inside and outside
Check shingles, flashing, vents, chimneys, and valleys
Replace damaged or missing shingles
Re-seal cracked flashing and roof penetrations
Apply roofing cement to small gaps or cracks
Clean debris from gutters and roof surfaces
Dry the area before making repairs
Patch small holes with roofing repair materials
Replace damaged underlayment if needed
Secure loose nails and fasteners
Use matching roofing materials for repairs
Test the repaired area with water
Call a professional if the damage is extensive