- The commercial roofing technical exam has 50 scored questions in 2 hours 30 minutes with a 70% passing score.
- PSI administers the exam for $92, and it is computer delivered and open book.
- Low Slope Roofing is the largest of the six domains, so it deserves the most study hours.
- Initial commercial endorsement costs $230, on top of $75 initial registration fees.
What Is the OK-ROOF Endorsement?
The Oklahoma Roofing Contractor Commercial Endorsement Examination, commonly shortened to OK-ROOF, is the credentialing exam issued through the Oklahoma Construction Industries Board for roofing contractors who want to legally take on commercial roofing work in the state. Unlike a generic industry certificate, this is a state-recognized endorsement tied directly to your existing Oklahoma roofing registration. If you are still trying to understand the basics, our overview on What Is OK-ROOF? and the plain-language breakdown at OK-ROOF Meaning are good starting points before diving into exam mechanics.
PSI, the third-party testing vendor, administers the actual exam content. The Construction Industries Board handles licensing, registration, and endorsement issuance once you pass. That division of labor matters: your exam-day questions come from PSI's test bank, but your paperwork, fees, and renewal timeline flow through the state board.
Who Needs This Endorsement
Not every roofing professional in Oklahoma needs the commercial endorsement. It's built for contractors, qualifying parties, and business owners who intend to bid on and perform commercial roofing projects rather than strictly residential work. Roofing companies pursuing government contracts, large-scale reroofing jobs, or work on multi-tenant and industrial buildings typically need someone on staff holding this endorsement, usually the designated qualifying party for the business.
If you're evaluating whether the credential fits your career path, the analysis in Is the OK-ROOF Certification Worth It? Complete ROI Analysis 2026 walks through the practical tradeoffs, and OK-ROOF Jobs covers where the credential opens doors in the commercial roofing market.
Exam Format and Delivery
The commercial roofing technical exam is computer delivered through PSI testing centers and structured as follows:
- 50 scored questions within a 2 hour 30 minute time limit
- 70% passing score required
- Open-book format - you may bring approved reference material
- Silent, nonprinting, nonprogrammable calculator permitted
- Up to 10 unscored experimental items may appear, but the time spent on these does not count against your official limit
- Exam cost is $92, paid to PSI
Because up to 10 unrated questions can be mixed in without extending your allotted testing time in a way that penalizes you, candidates shouldn't panic if a question feels oddly worded or unfamiliar - it may simply be an experimental item PSI is field-testing for future versions of the exam.
Key Takeaway
Because the exam is open book, your prep time is better spent learning where information lives in your references and how to apply it quickly, rather than pure memorization. Pair that strategy with realistic timed practice - our practice test platform mirrors the pacing you'll face on exam day.
For a full breakdown of exactly what score you need and how scoring works, see OK-ROOF Passing Score 2026: Exactly What You Need to Pass. If you're still deciding when to schedule, check OK-ROOF Exam Dates 2026: Testing Windows, Deadlines & Scheduling for PSI's testing center availability patterns.
The Six Exam Domains
The commercial roofing technical exam draws its 50 scored questions from six content domains. Understanding the relative weight and focus of each is essential to allocating study time correctly - a topic covered in much greater depth in OK-ROOF Exam Domains 2026: Complete Guide to All 6 Content Areas.
Domain 1: General Roofing Knowledge
Foundational terminology, materials science, and basic principles that apply across all roofing system types.
- Roofing material categories and their appropriate applications
- Standard terminology used across manufacturer specifications and inspection reports
Domain 2: Low Slope Roofing
This is the largest domain on the exam, reflecting how central low slope systems are to commercial roofing work. Expect the deepest question coverage here.
- Membrane systems and their installation requirements
- Drainage design and slope considerations on commercial structures
- Seaming, fastening, and adhesion methods specific to low slope assemblies
Domain 3: Architectural Metal Roofing Systems and Sheet Metal Flashing
Covers panel systems, standing seam details, and the flashing work that keeps metal roofing systems watertight.
- Panel profiles and expansion/contraction allowances
- Flashing details at penetrations, valleys, and terminations
Domain 4: Moisture and Energy Control
Focuses on vapor barriers, insulation strategy, and how roofing assemblies manage thermal and moisture performance.
- Vapor retarder placement logic
- Insulation types and their role in commercial roof assemblies
Domain 5: Repairs and Reroofing
Tests judgment around when to repair versus replace, plus the technical steps of tear-off and reroofing projects.
- Assessing existing roof condition before recommending scope of work
- Sequencing a reroofing project to minimize exposure
Domain 6: Safety
Jobsite safety practices specific to commercial roofing environments, including fall protection and hazard awareness.
- Fall protection system requirements on low slope and steep slope work
- Hazard identification during tear-off and material staging
Since Low Slope Roofing carries the most weight, candidates often ask how difficult the overall exam feels once you factor in domain distribution. How Hard Is the OK-ROOF Exam? Complete Difficulty Guide 2026 unpacks that question directly, and OK-ROOF Pass Rate 2026: What the Data Shows looks at what's publicly known about performance on the exam.
Eligibility and Application Mechanics
Before you can sit for the commercial roofing technical exam, you must meet several prerequisites set by the Construction Industries Board:
- 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 with the Oklahoma Secretary of State
- Document $1 million in general liability coverage
- Carry workers compensation coverage
These aren't exam-day requirements - they're gatekeeping conditions that must be satisfied before you're approved to test. A full walkthrough of each requirement, including how the qualifying party designation works in practice, is available in OK-ROOF Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Fees, Registration, and Renewal
Money moves through two channels: the Construction Industries Board (registration and endorsement fees) and PSI (exam fee). Here's how the numbers break down:
| Item | Cost | Frequency |
|---|---|---|
| Commercial roofing technical exam | $92 | Per attempt, paid to PSI |
| Initial registration | $75 | One-time |
| Initial commercial endorsement | $230 | One-time |
| Annual registration renewal | $75 | Annual |
| Annual endorsement renewal | $100 | Annual |
| Continuing education (starting Jan 1, 2027) | 4 hours required | Annual |
Note the CE requirement change: starting January 1, 2027, endorsement holders must complete four continuing education hours annually to keep the commercial endorsement active. That's a new obligation, so if you're planning long-term around this credential, factor it into your renewal calendar. For the complete cost picture including how these fees compare across the registration and endorsement lifecycle, see OK-ROOF Certification Cost 2026: Complete Pricing Breakdown.
The Companion Roofing Business and Law Exam
The commercial roofing technical exam does not stand alone. Applicants must also pass a separate 50-question Roofing Business and Law examination. This second exam covers the regulatory and business-operations side of running a roofing contracting business in Oklahoma - separate from the technical content on materials, systems, and installation practices covered in the six domains above.
Candidates sometimes underestimate this companion exam because it isn't part of the "commercial endorsement" name, but both exams are required to complete the credentialing process. Treat it as a distinct study project rather than an afterthought.
References and Open-Book Rules
Since the exam is open book, knowing exactly what you're allowed to bring - and what PSI references the exam against - matters as much as content knowledge. The current PSI reference list points to the 2025 NRCA Steep Slope manual. Candidates should be thoroughly familiar with this reference before test day, not just aware it exists. Open-book format rewards candidates who've pre-tabbed their manual and practiced navigating it under time pressure, rather than those hoping to read unfamiliar sections cold during the exam.
Key Takeaway
Build a personal index or tab system for your 2025 NRCA Steep Slope manual well before exam day - flipping through an unmarked reference under a 2.5-hour clock costs precious minutes.
Building an OK-ROOF Study Plan
A focused study plan should mirror the exam's own weighting. Since Low Slope Roofing is the largest domain, it deserves the most calendar time, followed by proportional coverage of the remaining five domains and a dedicated block for the Roofing Business and Law exam.
Foundation and Low Slope Roofing
- Review General Roofing Knowledge terminology
- Begin deep study of Low Slope Roofing systems - the largest domain
- Tab your 2025 NRCA Steep Slope manual for quick reference
Metal Systems and Moisture Control
- Study Architectural Metal Roofing Systems and Sheet Metal Flashing details
- Cover Moisture and Energy Control principles
- Run untimed practice questions to check comprehension
Repairs, Reroofing, and Safety
- Study Repairs and Reroofing decision-making scenarios
- Cover Safety domain content, especially fall protection
- Begin timed practice sessions on the practice test platform
Business and Law Plus Full Review
- Dedicate focused time to the Roofing Business and Law exam content
- Take full-length timed practice exams under 2.5-hour conditions
- Review weak domains identified during practice
For a more detailed week-by-week methodology tailored specifically to this exam's domain weighting, see OK-ROOF Study Guide 2026: How to Pass on Your First Attempt. And if you want a compact reference for the final days before your test date, bookmark OK-ROOF Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Once you're comfortable with content, run full-length timed simulations on our practice test site to build stamina for the 2 hour 30 minute window and get accustomed to the open-book pacing you'll need on exam day.
Frequently Asked Questions
The exam has 50 scored questions with a time limit of 2 hours 30 minutes. Up to 10 additional unscored experimental questions may appear, but time spent on those doesn't count against your limit.
You need to score at least 70% on the 50 scored questions to pass the commercial roofing technical exam.
Yes. The exam is computer delivered through PSI and administered in an open-book format, and the current reference is the 2025 NRCA Steep Slope manual. A silent, nonprinting, nonprogrammable calculator is also permitted.
Yes. Applicants must also pass a separate 50-question Roofing Business and Law examination in addition to the commercial technical exam.
Starting January 1, 2027, endorsement holders must complete four continuing education hours annually as part of the renewal requirement, alongside the standard registration and endorsement renewal fees.