How to Inspect Your Roof — What to Look for and What Each Sign Means
Updated June 2026 · 9 min read
Most homeowners only think about their roof when something goes wrong — a ceiling stain appears, a shingle lands in the yard after a storm, or a home inspector flags it during a sale. By then, something that might have been a $300 repair has often become a $3,000 one.
A self-inspection twice a year catches most problems when they're still minor. You don't need to get on the roof to do a useful inspection — the ground-level and attic checks below cover the most important signals. Save climbing on the roof for confirmed issues that need closer examination, and only if you're comfortable doing it safely.
When to inspect
Spring (after winter), fall (before winter), and within 1 week after any major storm event — especially hail or winds above 60 mph. Don't wait for interior symptoms.
Part 1: Ground-Level Inspection
Take a slow walk around all four sides with binoculars. You'll be surprised what you can see clearly without climbing anything.
Roofline straightness
Walk around all four sides and look along the roofline. It should be straight and uniform. Any bowing, sagging, or unevenness suggests structural issues — rafters, purlins, or decking failure.
Shingle condition
From the ground with binoculars, look for missing shingles, curling at corners, cupping across the width, or dark patches where granules have worn off. These are signs of aging or storm damage.
Flashing at penetrations
At chimney, skylights, and wall junctions, look for metal that's visibly lifted, discolored (rust streaks), or has gaps between the flashing and the surface it covers.
Moss or algae
Dark vertical streaks are algae. Green or brown mats are moss. Both indicate moisture retention. Moss is the more urgent problem — its roots penetrate shingle layers.
Gutters and downspouts
Check for sagging sections, separated joints, downspouts that don't reach the ground or a splash block, and any sections where gutters have pulled away from the fascia.
Gutters contents
After rain or recently, look at what's in the gutters. Significant granule accumulation (like coarse sand) indicates shingle wear. You may also see broken shingle pieces after a storm.
Part 2: Attic Inspection
This is often more revealing than looking at the roof surface. Bring a flashlight, ideally inspect on a bright day, and wear a dust mask if the insulation is old.
Daylight through decking
On a sunny day, turn off attic lights and look for light coming through the roof boards. Any visible daylight means a hole, gap, or missing decking section.
Water stains on sheathing
Brown or dark staining on the roof decking, often running along rafters or spreading from one point. Even old stains (which appear gray) indicate the roof has previously been wet — which means the source may still exist.
Wet or compressed insulation
Insulation that's been wet mats down, loses R-value, and may smell musty. Poke any compressed areas with a stick — moisture that appears to come from above is a roof leak; moisture from below may be condensation.
Mold on framing
Black or dark gray spots or fuzz on rafters, ridge board, or sheathing. Mold growth means moisture levels in the attic have been elevated long enough to support it — usually months.
Ventilation check
With the attic door closed, does the attic feel like a furnace in summer? On a cold morning, is there frost on the sheathing? Both suggest ventilation problems that are affecting the roof's longevity.
Insulation depth
Stick a ruler in the insulation. R-38 is approximately 12 inches of blown cellulose; R-49 is about 16 inches. Less than 10 inches in a cold climate is inadequate and contributes to ice dam formation.
What to Do With What You Find
Frequently Asked Questions
How often should I inspect my roof?
Twice a year — spring and fall — is the standard recommendation. Spring inspection catches winter damage before the wet season sets in; fall inspection identifies issues to address before freeze-thaw cycles begin. Additionally, inspect within a week after any major storm event — high winds, large hail, or tornado weather. Don't wait for a visible interior leak, which means damage has already occurred.
Is it safe to walk on my roof for an inspection?
It depends on the pitch and material. A low-slope roof (3:12 or less) can be walked on safely with rubber-soled shoes in dry conditions. Steeper pitches require proper roofing safety equipment — harness, anchor point, and experience. Tile and slate roofs should not be walked on without specific training as the material is fragile. For most homeowners, a thorough ground-level inspection supplemented by attic access covers the important signals without climbing on the roof.
What does granule loss in gutters mean?
Some granule loss in the first year after a new roof is normal — excess granules shed during manufacturing and initial weathering. After that, granule accumulation in gutters is a sign of shingle wear. After a hail storm, granule accumulation is a sign of impact damage to the granule coating — the shingles' UV protection is compromised. Significant granule loss on a mid-age roof is worth having professionally evaluated.
When should I call a professional roofer instead of inspecting myself?
Call a professional if: you see active ceiling stains after rain, daylight through the attic decking, sagging sections on the roofline, visible missing shingles covering more than one small area, or if the roof is more than 15 years old and you've never had a professional assessment. Also call for insurance claim support — a roofer's written documentation of damage is far more useful to your claim than homeowner photographs alone.
Found Something You're Not Sure About?
Get a professional inspection with a written report — free with any repair estimate.