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100+ Free InterNACHI Roof Inspector Practice Questions

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Inspecting a sidewall-to-roof intersection, you find no kickout flashing at the bottom of the step flashing run. Which condition should you anticipate?

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2026 Statistics

Key Facts: InterNACHI Roof Inspector Exam

75

Final Exam Questions

InterNACHI How to Perform Roof Inspections course

1:150

Default IRC Vent Ratio

IRC R806

2:12

Min Slope for Asphalt Shingles

IRC R905.2.2

6 ft

OSHA Residential Fall Trigger

29 CFR 1926.501

1:4

Ladder Placement Ratio

OSHA 1926 Subpart X

$0

Exam Fee for Members

InterNACHI

The InterNACHI Certified Roof Inspector credential validates that you can identify roof coverings, flashings, ventilation defects, and storm damage during a residential roof inspection. The 75-question online final exam covers asphalt shingles, tile, metal, low-slope membranes, underlayment, flashing details, IRC ventilation ratios, slope, drainage, and OSHA fall protection.

Sample InterNACHI Roof Inspector Practice Questions

Try these sample questions to test your InterNACHI Roof Inspector exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which roof covering typically has the longest service life under normal residential conditions?
A.3-tab asphalt shingles
B.Architectural (laminated) asphalt shingles
C.Wood shake
D.Slate
Explanation: Natural slate roofs commonly exceed 100 years of service life and are considered the longest-lasting traditional residential roof covering. 3-tab shingles typically last 20-30 years, architectural shingles 25-30 years, and wood shake 25-40 years.
2What is the primary visual difference between 3-tab and architectural asphalt shingles?
A.3-tab shingles have a thicker base mat
B.Architectural shingles are laminated with multiple layers for a dimensional look
C.3-tab shingles are only available in dark colors
D.Architectural shingles do not use ceramic granules
Explanation: Architectural (laminated, dimensional) shingles are manufactured with two or more layers bonded together to create a thicker, contoured appearance. 3-tab shingles are a single flat layer with cutouts that produce three uniform tabs.
3Architectural asphalt shingles are typically rated for wind speeds in what range?
A.30 to 50 mph
B.60 to 70 mph
C.80 to 130 mph
D.150 to 200 mph
Explanation: Standard architectural shingles carry wind ratings between approximately 80 and 130 mph depending on the manufacturer. 3-tab shingles typically only carry 60-70 mph ratings, which is why many coastal jurisdictions no longer permit 3-tab installation.
4Which characteristic best identifies a concrete tile roof versus a clay tile roof during a visual inspection?
A.Concrete tiles are always flat and rectangular
B.Clay tiles are noticeably heavier per square foot than concrete
C.Concrete tiles are typically heavier and may show a coated finish that can wear with age
D.Only clay tiles can be installed on battens
Explanation: Concrete tiles are usually heavier than clay tiles and are factory-coated for color. Inspectors often observe surface coating wear and efflorescence on aged concrete tiles, which clay tiles do not exhibit because the color is integral to the fired clay body.
5Which is the MOST significant inspection concern with an exposed-fastener metal roof compared to a standing-seam metal roof?
A.Exposed-fastener panels cannot be painted
B.The rubber washers under exposed fasteners degrade and leak over time
C.Exposed-fastener panels do not require underlayment
D.Exposed-fastener panels cannot be installed on residential slopes
Explanation: Exposed-fastener metal roofs rely on neoprene or EPDM washers beneath the screws to seal each penetration. UV and thermal cycling deteriorate these washers, leading to leaks long before the panels themselves fail. Standing-seam systems hide fasteners in the seam, eliminating this failure mode.
6What is the typical service-life range for a wood shake roof in a temperate climate?
A.5 to 10 years
B.10 to 20 years
C.25 to 40 years
D.75 to 100 years
Explanation: Properly installed and maintained wood shake roofs typically last 25-40 years. Climate, exposure, and treatment affect actual longevity, but well-ventilated cedar shake systems regularly meet the upper end of the range.
7Modified bitumen membranes are typically modified with which two compounds?
A.APP (atactic polypropylene) and SBS (styrene-butadiene-styrene)
B.EPDM and PVC
C.TPO and HDPE
D.Coal tar and pitch
Explanation: Modified bitumen sheets are produced by blending asphalt with either APP (atactic polypropylene) for a torch-applied plastic-modified sheet or SBS (styrene-butadiene-styrene) for a rubberized sheet that can be torch, mop, or cold-applied.
8EPDM membranes are best classified as which type of roof membrane?
A.Thermoplastic single-ply
B.Thermoset single-ply rubber
C.Built-up bituminous
D.Modified bitumen
Explanation: EPDM (ethylene propylene diene monomer) is a thermoset rubber single-ply membrane. Unlike TPO or PVC, EPDM seams cannot be heat-welded and instead rely on adhesive tape or contact adhesive.
9How are TPO membrane seams typically joined in the field?
A.Cold-applied contact adhesive only
B.Hot asphalt mopping
C.Hot-air welding
D.Mechanical clip seaming
Explanation: TPO (thermoplastic polyolefin) is heat-weldable. Robotic or hand-held hot-air welders fuse adjacent sheets into a monolithic membrane. EPDM by contrast uses tape or adhesive because it is thermoset.
10A built-up roof (BUR) is best described as which assembly?
A.A single layer of rubber sheeting fully adhered
B.Alternating plies of bituminous felts and asphalt or coal-tar pitch
C.Concrete panels topped with elastomeric paint
D.Metal panels with foam insulation between
Explanation: BUR is constructed of multiple plies of organic or fiberglass felts alternated with hot asphalt or coal-tar pitch, often topped with gravel. The number of plies determines the system's redundancy and life expectancy.

About the InterNACHI Roof Inspector Exam

The InterNACHI Certified Roof Inspector designation is awarded to inspectors who complete InterNACHI's How to Perform Roof Inspections course and pass its 75-question online final exam. The course teaches inspectors how to safely and accurately inspect roof-covering systems, flashings, ventilation, and decking on residential structures.

Questions

75 scored questions

Time Limit

Self-paced

Passing Score

Weighted; ~80 cut-off

Exam Fee

Free for InterNACHI members (InterNACHI (International Association of Certified Home Inspectors))

InterNACHI Roof Inspector Exam Content Outline

~30%

Coverings & Decking

Asphalt shingle types, tile, metal, slate, wood shake, membranes, decking, and underlayment

~30%

Flashing & Ventilation

Step, kickout, valley, chimney, pipe boot flashing and IRC 1:150 / 1:300 attic ventilation

~25%

Defects & Slope

Shingle cupping, blistering, granule loss, hail and wind damage, slope minimums and drainage

~15%

Safety

OSHA 6 ft fall protection trigger, 1:4 ladder placement, personal fall arrest, and ladder duty ratings

How to Pass the InterNACHI Roof Inspector Exam

What You Need to Know

  • Passing score: Weighted; ~80 cut-off
  • Exam length: 75 questions
  • Time limit: Self-paced
  • Exam fee: Free for InterNACHI members

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

InterNACHI Roof Inspector Study Tips from Top Performers

1Memorize the IRC attic ventilation ratios: 1:150 default, 1:300 with a vapor retarder or balanced intake and exhaust
2Know the minimum roof slope for asphalt shingles (2:12) and the double-underlayment requirement between 2:12 and 4:12
3Be able to distinguish 3-tab from architectural (laminated) shingles by wind rating and impact class
4Recognize hail damage signs: concave dents, granule displacement, soft bruising vs. mechanical or manufacturer defects
5Learn flashing details cold: step at sidewalls, kickout at the bottom, counter flashing kerfed into mortar at chimneys
6Memorize OSHA's 6 ft residential fall protection trigger and the ladder 1:4 placement ratio (1 ft out per 4 ft up)
7Understand low-slope membrane minimums: 1/4:12 for BUR, modified bitumen, EPDM, and TPO
8Know ice and water shield extends from the eave edge to a point at least 24 inches inside the exterior wall

Frequently Asked Questions

What is the InterNACHI Certified Roof Inspector designation?

The InterNACHI Certified Roof Inspector is a credential awarded by the International Association of Certified Home Inspectors (InterNACHI) to members who complete the How to Perform Roof Inspections online course and pass its 75-question final exam. It recognizes inspectors who can safely and accurately evaluate residential roof-covering systems, flashing, ventilation, decking, and storm damage.

How do I become an InterNACHI Certified Roof Inspector?

To earn the credential you must: (1) be an active InterNACHI member, (2) complete the How to Perform Roof Inspections course at nachi.org, (3) pass the 75-question online final exam, and (4) agree to abide by the InterNACHI Code of Ethics and Standards of Practice. The course and exam are free for members and are self-paced online.

How many questions are on the InterNACHI roof inspector exam?

The InterNACHI How to Perform Roof Inspections final exam contains 75 multiple-choice questions drawn from a larger pool. The exam is weighted, with a target cut-off near 80%, and is delivered online at nachi.org. It can be retaken after review without a mandatory waiting period.

What does the InterNACHI roof inspector exam cover?

The exam covers: roof coverings (asphalt shingles, tile, metal, slate, wood shake, and low-slope membranes), decking and underlayment (including ice and water shield at eaves), flashing (step, kickout, valley, chimney, plumbing boots), attic ventilation (IRC 1:150 and 1:300 ratios), common defects (cupping, blistering, granule loss, hail and wind damage), slope and drainage, and OSHA fall protection and ladder safety.

What is the cost of the InterNACHI roof inspector course and exam?

The How to Perform Roof Inspections course and the certification exam are free for InterNACHI members. InterNACHI membership is approximately $49 per month or discounted annually and grants access to the entire course library. State licensing fees and insurance, if required, are separate costs.

Is the InterNACHI Roof Inspector credential accepted for state licensing?

InterNACHI Roof Inspector is a private credential. Many state home inspector licensing boards accept InterNACHI coursework as part of the educational requirement, but specific roof inspector recognition varies by jurisdiction. Always confirm requirements with your state regulator before relying on the credential for licensure.