Roof Inspection Checklist: What a Pro Examines

What Separates a Real Inspection From a Sales Walk

A legitimate roof inspection is a documented, systematic evaluation of every component in the roofing system — not a sales visit where a contractor walks the perimeter, announces the roof needs replacing, and hands you a quote. A proper inspection covers the exterior surface, all flashings and penetrations, the gutter and drainage system, the attic structure, and the ventilation configuration.

Insist on a written report with photographs. A verbal summary is not an inspection — it's an opinion. The written report protects you when evaluating contractors, filing insurance claims, negotiating home purchases, and budgeting for future maintenance or replacement.

Exterior Inspection: Surface, Flashing, and Drainage

Shingle surface examination looks for: granule coverage (thin or bald areas indicate accelerated aging or hail impact), shingle flexibility (brittle shingles crack during inspection), cupping and clawing (edge and center deformation indicating material fatigue), nail pops (fasteners pushing upward through the shingle surface), and any visible cracking, splitting, or missing material.

Flashing inspection covers every location where a vertical element meets the roof plane — chimney bases (all four sides), pipe penetrations (every boot collar), skylights (all four sides and corners), wall-to-roof junctions, and valley systems. Inspectors check for lifted or separated flashing, failed sealant, rust or corrosion on galvanized metal, and counter-flashing that has pulled away from masonry joints.

Drainage examination covers gutters, downspouts, and the roof's pitch and valley design. Gutters should be free of debris and properly pitched toward downspouts. Downspouts should extend away from the foundation. Valley systems should show no debris buildup, no granule accumulation at the valley base (which indicates accelerated wear), and no open seams where adjacent shingle courses don't properly overlap the valley metal.

• Shingle condition: granule coverage, flexibility, cupping, clawing, nail pops
• Flashing at all chimney sides, pipe boots, skylights, and wall junctions
• Ridge cap condition and fastener security
• Valley metal or closed-cut valley integrity
• Gutter pitch, joint seals, and downspout extensions
• Soffit and fascia condition for signs of moisture infiltration

Interior Inspection: Attic, Decking, and Ventilation

The attic inspection is where structural and moisture problems that are invisible from outside are identified. Inspectors look for: daylight visible through roof decking (active breaches), water staining on rafters or sheathing (evidence of past or ongoing infiltration), soft or spongy decking sections (moisture-degraded OSB or plywood), and any mold growth on wood surfaces in the attic cavity.

Ventilation assessment determines whether intake and exhaust airflow is adequate for the attic volume. An under-ventilated attic overheats in summer, accelerating shingle deterioration from below, and retains humidity in winter, causing decking rot and insulation damage. The inspection checks soffit vent openings for blockage by insulation (a very common problem in older homes), ridge vent integrity, and whether total net free area meets code requirements for the attic square footage.

Moisture readings are taken with a digital moisture meter at multiple decking locations. Readings above 19% indicate active moisture retention in the wood — a threshold that leads to structural degradation and mold if not addressed. Normal dry decking reads 12–16%.

• Daylight visible through decking or around penetrations
• Water staining patterns on rafters and sheathing
• Decking moisture readings (normal: 12–16%)
• Insulation condition and coverage
• Soffit vent openings clear of insulation obstruction
• Ridge vent integrity and airflow pathway

After the Inspection: What You Receive

A complete professional inspection delivers a written report with: an overall condition rating (typically a 1–10 scale or Good/Fair/Poor), photographs of all identified deficiencies with location references, an estimated remaining useful life based on material type, age, and condition, a prioritized repair list with urgency classification, and a recommendation on whether repair or replacement is the appropriate next step given the documented condition.

The written report has concrete uses beyond the immediate decision. For home buyers, it provides independent documentation of roof condition separate from the general home inspection (which often addresses the roof only superficially). For insurance claims, the pre-storm baseline inspection report establishes original condition — critical when the insurer disputes pre-existing damage. For homeowners planning financially, the remaining life estimate allows replacement budgeting on a defined timeline.

For maximum value, schedule inspections in spring — before storm season — and fall — before winter loading. Twice-annual inspection catches seasonal damage while repair windows are still open and catches summer heat damage before winter compounds it.