- The exam is 50 scored questions, computer-delivered, open book, in 2 hours 30 minutes with a 70% passing score.
- Up to 10 unscored experimental items may appear, but their time doesn't count against your limit.
- Low Slope Roofing is the largest domain - weight your review time toward it first.
- Initial commercial endorsement costs $230 on top of a $75 registration fee; renewal is $75 plus $100 annually.
Quick Facts Table
Before you dive into domain review, anchor yourself to the numbers that actually appear on the Oklahoma Roofing Contractor Commercial Endorsement Examination (OK-ROOF). These are the facts that show up in registration paperwork, scheduling emails, and the exam-day check-in - memorize them cold.
| Item | Detail |
|---|---|
| Issuing agency | Oklahoma Construction Industries Board |
| Test administrator | PSI |
| Exam fee | $92 |
| Scored questions | 50 |
| Time limit | 2 hours 30 minutes |
| Passing score | 70% |
| Format | Computer delivered, open book |
| Calculator policy | Silent, nonprinting, nonprogrammable only |
| Experimental items | Up to 10 unscored, time excluded from limit |
If any of these numbers feel unfamiliar, back up and read the OK-ROOF Requirements 2026 guide before you register - it walks through every prerequisite in order.
Exam Format at a Glance
OK-ROOF is a computer-delivered, open-book exam administered through PSI. That single detail changes how you should study: you are not memorizing every code table from memory, you're learning where to find answers fast inside your approved references and understanding the underlying logic well enough to apply it under time pressure.
- 50 scored questions pulled from six defined content domains.
- 2 hours 30 minutes total - roughly three minutes per scored question if you ignore breaks, though pacing is rarely linear.
- Up to 10 additional unscored items may be mixed in to test future exam content. You won't know which questions are experimental, and importantly, the time PSI allows for those items doesn't count against Oklahoma's overall limit - so don't panic if the exam feels slightly longer than expected.
- Open book means you can bring approved reference material, but flipping through an unfamiliar manual during a timed exam wastes minutes you don't have. Tab your references in advance.
The Six Domains, Fast
Every scored question on OK-ROOF maps to one of six domains. Knowing the relative weight of each helps you allocate review hours instead of spreading them evenly and running out of time on the topic that matters most.
Domain 1: General Roofing Knowledge
Foundational terminology, materials, and roofing system fundamentals that underpin every other domain.
- Roofing vocabulary and component names
- Basic material properties and common system types
Domain 2: Low Slope Roofing
The largest domain on the exam and the one deserving the most review hours. Covers membrane systems, installation sequencing, and low-slope-specific detailing.
- Single-ply and built-up system distinctions
- Drainage, slope, and membrane termination details
Domain 3: Architectural Metal Roofing Systems and Sheet Metal Flashing
Metal panel systems and the flashing details that keep water out at transitions and penetrations.
- Panel profiles and fastening methods
- Flashing at valleys, walls, and penetrations
Domain 4: Moisture and Energy Control
Vapor drive, insulation placement, and how moisture management interacts with energy performance.
- Vapor retarder placement logic
- Insulation types and their moisture behavior
Domain 5: Repairs and Reroofing
Diagnosing failure points and choosing appropriate repair versus tear-off and reroof strategies.
- Common failure modes and root causes
- Repair versus replacement decision criteria
Domain 6: Safety
Jobsite safety practices relevant to commercial roofing work.
- Fall protection basics
- General jobsite hazard awareness
For a deeper breakdown of subtopics and sample question styles inside each domain, see the full OK-ROOF Exam Domains 2026 guide. If you're still deciding how much total study time to budget, the OK-ROOF difficulty guide and OK-ROOF pass rate breakdown both give useful context before you commit to a schedule.
Key Takeaway
Since Low Slope Roofing is the largest domain, start your review there. Weak spots in Domain 2 have the biggest downside on your overall score.
Fees and Registration Mechanics
OK-ROOF isn't just an exam - it's part of a larger licensing and business-registration process through the Oklahoma Construction Industries Board. Understanding the money flow prevents surprises during application.
| Fee | Amount | When Due |
|---|---|---|
| Initial registration | $75 | At initial application |
| Initial commercial endorsement | $230 | At initial application |
| Exam fee (PSI) | $92 | At exam scheduling |
| Annual registration renewal | $75 | Yearly |
| Annual endorsement renewal | $100 | Yearly |
Beyond the exam fee, applicants must also pass a separate 50-question Roofing Business and Law examination - a distinct test from the technical OK-ROOF exam, so don't confuse study material between the two. For a complete cost picture including both exams and renewal cycles, review the OK-ROOF Certification Cost breakdown.
Eligibility Snapshot
Before you can even sit for the exam, Oklahoma requires several boxes checked. Missing one of these can delay your test date by weeks.
- Must be at least 18 years old.
- Must hold an Oklahoma roofing registration in good standing.
- Must designate an actively engaged qualifying party for the business.
- Business must be registered with the Oklahoma Secretary of State.
- Must document $1 million general liability coverage plus workers compensation coverage.
Each of these items has its own paperwork trail, so give yourself lead time. The full requirements guide covers the documentation order that avoids the most common processing delays.
2027 Continuing Education Rule
This CE requirement applies to the endorsement itself, separate from the exam. It doesn't change what's tested on OK-ROOF today, but it does mean the credential requires ongoing upkeep once you hold it - worth factoring into any long-term decision about whether the endorsement pays off for your business. If you're weighing that decision, the OK-ROOF ROI analysis and OK-ROOF Salary Guide both address what the credential is worth to commercial roofing contractors over time.
Open-Book References and Calculator Rules
Two mechanical details trip up otherwise well-prepared candidates: what you're allowed to bring, and what you're allowed to use.
- References: The current PSI candidate references point to the 2025 NRCA Steep Slope manual. Confirm you're studying from the correct edition - older editions may organize sections differently or omit updated guidance.
- Calculators: Only silent, nonprinting, nonprogrammable calculators are permitted. A phone calculator, a graphing calculator, or anything with printing capability will be rejected at check-in. Bring a simple, dedicated unit.
Key Takeaway
Open book doesn't mean "look everything up." Tab the sections of your NRCA reference you expect to need most - especially anything tied to Domain 2 and Domain 3 - before exam day, not during it.
Last-Week Review Plan
If you've already done deep study using a full plan like the one in the OK-ROOF Study Guide 2026, this section is your final-week compression pass - not a replacement for that groundwork.
Domain 2: Low Slope Roofing
- Re-review membrane systems and drainage details - the largest domain deserves the first pass while your mind is freshest
- Practice scenario questions rather than rereading notes
Domains 3 & 4
- Metal roofing and flashing details
- Vapor control and insulation placement logic
Domains 5 & 6
- Repair versus reroof decision trees
- Safety fundamentals refresh
Domain 1 and Full Mix
- General roofing knowledge quick review
- Full-length timed practice run on the practice test site to simulate the 2 hour 30 minute limit
Weak-Spot Cleanup
- Revisit only the domains where practice scores lagged
- Confirm passing-score math so you know exactly what 70% requires - see the OK-ROOF Passing Score guide for the exact breakdown
- Confirm your scheduled exam date against the OK-ROOF Exam Dates guide
Last-Minute Mistakes to Avoid
Most failed attempts aren't caused by lack of knowledge - they're caused by avoidable process errors. Check these off before test day:
- Bringing the wrong calculator. Any device with printing or programming capability gets confiscated at check-in, not just flagged.
- Studying an outdated reference edition. Confirm you're working from the 2025 NRCA Steep Slope manual, since PSI ties its references to that edition.
- Ignoring domain weighting. Spending equal time on all six domains shortchanges Low Slope Roofing, the largest and most heavily tested area.
- Confusing the two required exams. The technical OK-ROOF exam and the separate 50-question Roofing Business and Law exam test completely different material - don't cross-study assuming overlap.
- Forgetting insurance documentation. The $1 million general liability and workers compensation proof must be current and filed correctly, not just obtained at some point.
Once you've passed and hold the endorsement, plenty of contractors ask what comes next in terms of finding work - the OK-ROOF Jobs overview and OK-ROOF Training resources are good places to continue from here, and the core OK-ROOF Certification overview ties the whole process together if you want a single reference point.
Frequently Asked Questions
Yes, it's open book, but that doesn't mean it's easy - you still need to know where to find information quickly within your approved 2025 NRCA Steep Slope reference during a 2 hour 30 minute window, which requires real familiarity, not just possession of the manual.
There are 50 scored questions. PSI may also include up to 10 unscored experimental items, but the time allotted for those doesn't count against your overall limit.
You need 70% on the scored questions. See the dedicated OK-ROOF Passing Score guide for how that translates into a raw number correct.
Yes. Applicants must also pass a separate 50-question Roofing Business and Law examination in addition to the commercial roofing technical exam.
Four CE hours become an annual requirement for commercial-endorsement holders starting January 1, 2027. It doesn't affect the exam content itself, but it does affect ongoing renewal obligations.