What a Professional Roof Inspection Includes and How to Read the Report

A roof report is only as complete as its author’s job: a home inspector may judge the roof from the ground, a roofer looks for repairs to quote, an insurer’s inspector weighs insurability or a claim, and a structural engineer checks the framing. Read the method and limitation lines first, because they set what the findings can support.

That habit prevents two misreadings: a buyer treating “no visible defects from ground level” as a clean bill of health, and a homeowner treating a roofer’s replacement quote as a neutral diagnosis.

Four Kinds of Roof Inspection and Who Performs Each

Each inspector is hired to answer a different question, and the report reflects that question.

The insurer’s inspection carries extra weight for older roofs. If a roof is over 20 years old when you apply for coverage, most insurance companies will require it to pass an inspection, according to the Insurance Information Institute’s guide to roofs and home insurance. For how insurers use roof age, see why insurers restrict older roofs, and for what imagery from drones, planes and satellites can and cannot show, see aerial and drone roof inspections.

An engineer’s report may say nothing about the shingles. Use it to decide whether the structure can carry the roof you have or the one you want before you collect roofing quotes.

If you want to check the roof yourself before hiring anyone, inspect it from the ground and the attic without climbing.

What a Home Inspector Must and Need Not Check

The InterNACHI Home Inspection Standards of Practice, last revised October 2022, says the inspector “shall inspect from ground level or the eaves.” Its roof section also says the inspector is not required to walk on any roof surface, predict the service life expectancy, or confirm proper fastening or installation of any roof-covering material.

That standard belongs to one association. Other associations and some states publish their own, and their roof scope may differ, so ask the inspector in writing which standard they follow and whether they will walk the roof, enter the attic and photograph each finding. A home inspection that stays within its standard is doing its job. It is a screening, and its roof section is a starting point for a decision, not the decision.

What a Roofer’s Inspection Adds, and Its Built-In Conflict

A roofer can do what the home inspector’s standard does not require: walk the roof where it is safe, check fastening and flashing up close, feel for soft decking, and match what the attic shows to what the surface shows. HUD’s Residential Rehabilitation Inspection Guide, revised February 2000, lists the core items an inspector should look for on a pitched roof: “deteriorated or loose flashing, signs of damage to the roof covering, and valleys and gutters clogged with debris.”

The conflict is plain: the person diagnosing the roof may also be the person paid to fix it, and when the inspection is free, the possible repair job is the only pay. That does not make the diagnosis wrong. It means the report should let you check it. Ask for a photo of every finding with its location, a clear split between what was observed and what is recommended, and a statement of which problems are local and which run across the roof. For a replacement recommendation, a second roofer’s opinion on the same photos is a reasonable check.

How to Read the Report: Sections That Should Be There

A report you can act on contains these parts. Missing items are questions to send back before you sign anything.

• Scope and method: walked, ladder at the eaves, drone, ground only; attic entered or not.
• Date, weather and access limits, such as a wet surface or a steep slope that kept the inspector off the roof.
• Covering type, layer count and estimated age, with the basis for the age (records, physical clues or a guess). HUD’s guide says no more than two layers of asphalt shingles should normally be in place at one time.
• Findings by location, each with a photo: flashing at chimneys, walls and penetrations; valleys; gutters; covering damage; deck condition.
• Attic findings: stains, daylight, damp insulation, ventilation.
• Recommendations kept separate from findings, with urgency for each.
• Limitations section and the inspector’s name, company and credentials.

Limitation Lines That Change What a Report Means

The limitation lines are where a report tells you what it did not do. Read them before the findings.

• “Inspected from ground level” or “not walked”: findings cover only what was visible from there. Fastening, soft decking and small flashing gaps may not have been checked.
• “Remaining life estimated”: under the InterNACHI standard the inspector is not required to predict service life, so any estimate is an opinion. Ask what it is based on.
• “Attic not entered” or “limited access”: leaks, stains and ventilation problems on the underside were not checked.
• “Fastening not confirmed”: nailing quality is unknown, which matters for wind resistance and warranty questions.
• “Wet surface” or “snow covered”: the covering itself may not have been visible.

If a limitation line covers the question you are trying to answer, the report cannot answer it. Order the inspection type that can.

Where Each Finding Leads Next

Each of these findings has a page that goes deeper:

• End-of-life wear across the roof: HUD’s guide says asphalt shingles that lose their granules and start to curl should be replaced. Which signs mean a new roof sorts roof-wide signs from local ones.
• Granule loss: granule loss explained separates normal shedding from a failing roof.
• Curling, cupping or clawing: what curled shingles mean ties each shape to a cause.
• Blisters: shingle blisters covers the hail look-alike and the warranty route.
• Black streaks, moss or lichen: roof streaks and moss identifies the growth and its risk.
• Sagging: sagging roof causes explains deck versus framing sag and when it is an emergency.
• A leak with an unknown source: tracing a roof leak follows the water from stain to entry point.
• Leaks only in storms: why a roof leaks only in heavy rain or wind covers vents, laps and low-slope sections.
• Water coming in now: what to do inside during a roof leak comes first; the inspection waits.

Which Inspection Do You Need Right Now?

If you are buying a house, start with the home inspection and add a roofer or roof specialist when the report shows limits; evaluating the roof before closing sets out the steps inside the contingency deadline. If the loan is FHA or VA, read FHA and VA roof requirements too.

If you have a leak, visible damage or an aging roof, book a roofing contractor’s inspection and ask for photos of every finding. If you see a sagging ridge or rafter line, call a structural engineer first. If the inspection is routine, the National Roofing Contractors Association’s resources page notes that inspections twice a year can uncover cracked, warped or missing shingles, so a check twice a year, your own from the ground and attic or a professional’s, is a reasonable rhythm.

Before you book any of them, ask in writing whether the inspector will walk the roof, enter the attic and photograph findings, and make the answer part of the appointment.

This guide is general information for U.S. homeowners, not legal, insurance, tax, or engineering advice. Codes, laws, and policy terms vary by location and change over time; confirm details with your local building department, your insurer, or a licensed professional.

Sources

• How Your Roof Influences Your Home and Business Insurance, Insurance Information Institute
• InterNACHI Home Inspection Standards of Practice, International Association of Certified Home Inspectors
• Residential Rehabilitation Inspection Guide, U.S. Department of Housing and Urban Development
• Resources (warranties, maintenance, weather events), National Roofing Contractors Association