- What OK-ROOF Actually Means
- Who Issues It and Who Administers the Test
- Exam Format and Question Style
- The Six Domains Behind the Letters
- Eligibility and the Business Side
- What OK-ROOF Costs, From Registration to Renewal
- Who Actually Needs This Endorsement
- Preparing for the Exam Without Wasting Time
- Frequently Asked Questions
- OK-ROOF is the Oklahoma Roofing Contractor Commercial Endorsement Examination, issued by the Oklahoma Construction Industries Board.
- The exam has 50 scored questions in 2 hours 30 minutes, computer delivered, open book, with a 70% passing score.
- Up to 10 unscored experimental items may appear, but they never count against your time limit.
- Low Slope Roofing is the largest of the six domains and deserves the most study hours.
What OK-ROOF Actually Means
OK-ROOF stands for the Oklahoma Roofing Contractor Commercial Endorsement Examination. It is not a general trade certificate or a national credential you can carry across states - it is a state-specific technical examination tied directly to Oklahoma's roofing registration system. If you install, repair, or oversee commercial roofing work in Oklahoma and want the legal endorsement to bid and perform that work, this exam is the gate you have to pass.
The name itself tells you exactly what's being tested: it's a commercial endorsement, meaning the content leans toward low-slope and architectural metal systems rather than residential shingle work exclusively. It's an examination in the strictest sense - closed to interpretation, scored against a fixed passing threshold, and administered under proctored, computer-based conditions.
Who Issues It and Who Administers the Test
The Oklahoma Construction Industries Board (CIB) is the state agency that issues the credential itself - meaning it's the CIB that decides who qualifies, maintains the registry of endorsed contractors, and enforces renewal requirements. The actual testing logistics, however, are handled by PSI, a third-party exam administration company that delivers the exam by computer at approved test centers.
This split matters for how you prepare. The CIB sets eligibility rules (who can sit for the exam and what business documentation is required), while PSI controls the test-day experience: scheduling, check-in, the reference materials you're allowed to bring, and the scoring report you receive afterward. For a full breakdown of who qualifies before you even schedule a seat, see our detailed OK-ROOF Requirements guide.
Exam Format and Question Style
The OK-ROOF exam consists of 50 scored questions, and you're given 2 hours and 30 minutes to complete it. It is computer delivered, which means answer choices, navigation, and flagging for review all happen on-screen rather than on paper. It is also open book - a detail that surprises some candidates who assume every licensing exam is closed-book memorization.
Being open book does not make the exam easy. Because you're allowed reference material, PSI expects you to know exactly where to find information quickly rather than have it all memorized. The current PSI reference list includes the 2025 NRCA Steep Slope manual, so candidates should be comfortable navigating that document under time pressure, not just owning a copy of it.
A few other mechanical details worth knowing before test day:
- You're permitted a silent, nonprinting, nonprogrammable calculator - no phone calculators, no graphing calculators.
- Up to 10 additional unscored experimental questions may be mixed into your exam. These are used by PSI to test future questions, but critically, the time you spend on them does not count against your 2 hour 30 minute limit.
- You need 70% correct on the scored items to pass - there is no partial credit or curve.
For an item-by-item breakdown of exactly what "70%" translates to in raw questions answered correctly, read our OK-ROOF Passing Score guide. And if you're trying to gauge how tough this exam really is relative to other trade licensing tests, our How Hard Is the OK-ROOF Exam guide walks through the difficulty factors in more depth.
Key Takeaway
Because experimental questions don't consume extra time, don't panic if a question feels oddly unfamiliar or off-topic - just answer it as best you can and move on. It may not even be scored.
The Six Domains Behind the Letters
OK-ROOF content is organized into six domains, and understanding their relative weight is the single most useful thing you can do before opening a study guide. Low Slope Roofing is the largest domain on the exam, which means commercial-style membrane, built-up, and single-ply systems deserve disproportionate study time compared to steep-slope shingle topics.
Domain 1: General Roofing Knowledge
Foundational terminology, materials science, and code concepts that apply across every roofing system type.
- Roofing vocabulary and material classifications
Domain 2: Low Slope Roofing
The largest domain on the exam, covering membrane systems, built-up roofing, and single-ply application details relevant to commercial structures.
- Prioritize this domain first when building a study schedule
Domain 3: Architectural Metal Roofing Systems and Sheet Metal Flashing
Metal panel systems and the flashing details that keep transitions and penetrations watertight.
- Flashing geometry and metal compatibility issues
Domain 4: Moisture and Energy Control
Vapor barriers, insulation strategy, and how moisture management interacts with energy code compliance.
- Dew point and condensation control principles
Domain 5: Repairs and Reroofing
Diagnosing failure points in existing systems and the decision process behind repair versus full replacement.
- Tear-off sequencing and substrate assessment
Domain 6: Safety
Jobsite safety practices specific to commercial roofing work at height.
- Fall protection and equipment inspection standards
For a complete walkthrough of every domain with study priorities mapped out, see the OK-ROOF Exam Domains 2026 guide.
Eligibility and the Business Side
OK-ROOF isn't just a knowledge test - it's wrapped inside a business licensing process. Before you can even sit for the exam, you need to meet several eligibility conditions:
- Be at least 18 years old
- Hold an Oklahoma roofing registration in good standing
- Designate an actively engaged qualifying party for the business
- Register the business entity with the Oklahoma Secretary of State
- Document $1 million in general liability coverage plus workers compensation insurance
On top of the technical exam covered in this article, applicants must also pass a separate 50-question Roofing Business and Law examination. This second exam covers contracts, licensing regulations, and business practices rather than roofing technique - so don't assume passing the technical exam alone completes your endorsement.
This dual-exam, documentation-heavy structure is unusual compared to many trade credentials, and it's worth mapping out well before your test date. Our Requirements guide lays out the exact order of operations most applicants follow.
What OK-ROOF Costs, From Registration to Renewal
Money flows through this credential in a few distinct places, and mixing them up is a common source of confusion:
| Item | Cost |
|---|---|
| Initial roofing registration | $75 |
| Initial commercial endorsement | $230 |
| Commercial technical exam fee (PSI) | $92 |
| Annual registration renewal | $75 |
| Annual endorsement renewal | $100 |
Note that beginning January 1, 2027, the endorsement renewal will also require 4 continuing education hours annually - a change worth planning for if you're endorsing now with an eye toward future renewal cycles. For the complete cost picture, including how these fees stack up over a multi-year career, read our OK-ROOF Certification Cost breakdown.
Who Actually Needs This Endorsement
The commercial endorsement is specifically for contractors and companies that want to legally bid, contract, and perform roofing work on commercial structures in Oklahoma - as opposed to residential-only registration. Qualifying parties named on a business's registration, roofing company owners expanding into commercial contracts, and project managers overseeing commercial roofing crews are the typical candidates.
Because commercial work often involves more low-slope membrane systems, metal roofing, and moisture control considerations than a typical residential re-shingle job, the domain weighting on this exam reflects real differences in the day-to-day work. If you're weighing whether pursuing this endorsement makes financial sense for your business, our Is OK-ROOF Worth It ROI analysis and OK-ROOF Salary Guide both dig into that question from different angles.
Preparing for the Exam Without Wasting Time
Because the exam is open book, your prep strategy should look different from a memorization-heavy closed-book test. The goal isn't to memorize every clause of the 2025 NRCA Steep Slope manual - it's to know your reference material well enough to locate answers quickly within your 2 hour 30 minute window, while still being able to answer conceptual and scenario-based questions from memory.
Low Slope Roofing Deep Dive
- Since this is the largest domain, spend the first two weeks here before moving to smaller domains
Metal Roofing and Flashing
- Study architectural metal systems and sheet metal flashing detailing
Moisture Control, Repairs, and Safety
- Cover the remaining three domains, then run timed practice sets under open-book conditions
Practice under real time constraints matters more here than with a typical closed-book test, because part of what's being measured is how efficiently you use your open-book resources. A full practice-test platform at okroofexam.com can help simulate that pressure before you sit for the real thing. For a structured week-by-week plan built entirely around these six domains, see our OK-ROOF Study Guide 2026, and if you want a condensed reference for last-minute review, the OK-ROOF Cheat Sheet summarizes must-know facts on a single page.
Key Takeaway
Practice under a strict 2 hour 30 minute clock with your reference material open - not closed - so your prep matches actual test-day conditions.
Frequently Asked Questions
OK-ROOF stands for the Oklahoma Roofing Contractor Commercial Endorsement Examination, issued by the Oklahoma Construction Industries Board and administered by PSI.
It is open book. Candidates may bring approved reference materials, including the current PSI-referenced 2025 NRCA Steep Slope manual, but must still know how to navigate them quickly under time pressure.
There are 50 scored questions with a 2 hour 30 minute time limit. Up to 10 additional unscored experimental questions may also appear, but time spent on those doesn't count against the limit.
Yes. In addition to the OK-ROOF technical exam, applicants must pass a separate 50-question Roofing Business and Law examination and meet registration, insurance, and business documentation requirements.
Low Slope Roofing is the largest of the six domains, making it the highest-priority area for study time, followed by the other five domains covering general knowledge, metal systems, moisture control, repairs, and safety.