What to Expect During a Professional Roof Inspection

Whether you are buying a home, selling one, filing an insurance claim, or just want to know the condition of your roof, a professional inspection removes the guesswork. But many homeowners have never had one and do not know what the process involves.

Here is exactly what happens during a professional roof inspection, what the inspector looks for, and what you receive afterward.

Before the inspection

When you schedule an inspection, the roofing company should confirm the date and time, tell you who will be coming, and let you know approximately how long it will take. You do not need to be home for most exterior-only inspections, but being present allows the inspector to point things out in person and answer questions on the spot.

Clear any items stored near exterior walls or under eaves. If the inspector needs attic access, make sure the access hatch or pull-down stairs are reachable.

What the inspector checks: exterior

Shingles or membrane condition. The inspector looks for cracking, curling, blistering, missing material, granule loss, or membrane tears.

Flashing. Every penetration (chimneys, vents, pipes, skylights) and every transition (walls, valleys, dormers) has flashing that seals the joint. The inspector checks for rust, lifting, cracked sealant, or missing flashing at each location.

Gutters and drainage. Gutters are checked for proper attachment, slope, debris accumulation, and condition. Downspouts are checked for proper routing away from the foundation. Standing water anywhere on the roof is documented.

Ridge, hip, and rake edges. The ridge cap, hip caps, and edge trim are inspected for damage, lifting, or missing pieces.

Ventilation. Proper attic ventilation is critical to roof longevity and shingle warranty compliance. The inspector checks ridge vents, soffit vents, gable vents, or powered ventilators for adequate airflow.

General structure. The inspector looks at the overall roof plane for sagging, waviness, or uneven surfaces that might indicate structural issues beneath.

What the inspector checks: interior

If attic access is available, the inspector goes inside to check for water stains on the underside of the decking, daylight visible through the roof boards, moisture or mold on framing members, insulation condition and depth, and proper ventilation baffles.

Interior inspection is not always possible (finished attics, limited access), but it provides valuable information that cannot be determined from the exterior alone.

How long it takes

A typical residential roof inspection takes 45 minutes to one hour. Larger or more complex roofs (multiple levels, steep pitch, extensive flat sections) may take longer. The on-site inspection is the shorter part. The written report with photos typically follows within one to two business days.

What you receive

A professional inspection report should include photographs of every area inspected (both problems and areas in good condition), a condition assessment for each roof component, specific recommendations (repair, monitor, or replace), estimated remaining useful life, and any safety or structural concerns.

For real estate transactions, the same report gives buyers, sellers and agents a clear statement of the roof's current condition and expected remaining life.

How much it costs

Professional roof inspections in the Bay Area typically cost $200 to $500 depending on roof size and complexity. Many roofing contractors offer free inspections as part of the estimate process. If the inspector recommends work, the inspection cost is often credited toward the project.

When to schedule one

Schedule a roof inspection if your roof is 15 or more years old and has not been inspected recently, you are buying or selling a home, you notice any warning signs (leaks, stains, missing shingles, granules in gutters), after a significant storm or wind event, or if your insurance company requests one.

A good inspection gives you facts, not pressure. Any inspector who uses scare tactics or pushes for an immediate commitment before delivering a written report is not acting in your interest.