The Free Roof Inspection Checklist Every Homeowner Should Use
You can catch 80% of roof problems from the ground with binoculars and this checklist — before they turn into a five-figure repair.
When to inspect
Twice a year minimum: after the wet season (April) and before the wet season (September/October). Plus after any windstorm above 40 mph or any hailstorm.
The 12-point checklist
1. Shingles laying flat, no curling or cupping. 2. No missing or cracked shingles visible from the ground. 3. No dark streaks (algae) or thick green pads (moss) — light staining is OK. 4. Ridge cap intact along the peak. 5. Flashing around chimneys, vents, and skylights not lifted or rusted. 6. Gutters draining freely and firmly attached. 7. Downspouts extending away from the foundation. 8. No sagging in the roof plane — sight along the ridge from the corner of the house. 9. No debris piles or branches on the roof. 10. Vents (soffit and ridge) not blocked. 11. Attic: no daylight through the roof deck. 12. Attic: no moisture stains on the underside of the decking.
What each finding means
Granules in the gutter = shingles losing UV protection. Curled shingles = end of service life. Dark streaks = algae (cosmetic to moderate). Thick moss = active decay, treat immediately. Lifted flashing = imminent leak point. Sagging = decking issue, get a pro up there fast. Attic moisture = ventilation problem or active leak.
When to call a roofer
Any leak, any sag, any lifted flashing, or more than two of the above findings at once. Trinity Roofing offers free photo-documented inspections across Western Washington — we walk the roof, photograph every finding, and email you the report.