- What the OK-ROOF Exam Actually Tests
- Registration, Fees, and Eligibility Before You Sit for It
- Domain-by-Domain Breakdown
- Exam Format, Timing, and the Open-Book Advantage
- A Domain-Weighted Study Timeline
- References You Need Open on Test Day
- Don't Forget the Roofing Business and Law Exam
- Common First-Attempt Mistakes
- After You Pass: Renewal and CE
- Frequently Asked Questions
- You need 70% correct on 50 scored questions in 2 hours 30 minutes to pass OK-ROOF.
- Low Slope Roofing is the largest domain, so allocate the most study time there.
- The exam is open book, but only a silent, nonprinting, nonprogrammable calculator is allowed.
- Up to 10 unscored experimental items may appear without adding to your time limit.
What the OK-ROOF Exam Actually Tests
The Oklahoma Roofing Contractor Commercial Endorsement Examination, administered on behalf of the Oklahoma Construction Industries Board by PSI, is the technical gateway that separates a general roofing registration from a commercial roofing endorsement. If you're searching for a genuinely OK-ROOF-specific plan rather than generic exam-prep filler, this guide is built entirely around the mechanics of this one exam: its domains, its fee structure, its calculator rules, and the reference manual PSI expects you to know cold.
Before diving into content, it helps to understand exactly what the credential is and who it's for. If you're still new to the process, our companion pieces on what OK-ROOF is and the OK-ROOF certification lay out the basics, while OK-ROOF's meaning and what OK-ROOF stands for clarify the acronym for anyone coming from a different state's licensing system.
Registration, Fees, and Eligibility Before You Sit for It
Unlike many voluntary certifications, OK-ROOF is tied directly to a state licensing pathway, so the eligibility mechanics matter as much as the content review. Before you can even schedule the exam, you must:
- Be at least 18 years old
- Hold an Oklahoma roofing registration in good standing
- Designate a qualifying party who is actively engaged in the business
- Register the business entity with the Oklahoma Secretary of State
- Document $1 million in general liability coverage plus workers' compensation coverage
On the money side, initial registration runs $75 and the initial commercial endorsement itself is $230. The technical exam fee charged by PSI is $92. Renewal afterward is $75 for registration plus $100 for the endorsement annually. For a full line-item breakdown of every fee across the process, see our dedicated OK-ROOF Certification Cost breakdown, and for the complete eligibility checklist, read OK-ROOF Requirements 2026.
Key Takeaway
Don't schedule your PSI exam appointment until your registration, qualifying party designation, and insurance documentation are already in order - the technical exam is only one piece of a multi-step endorsement process.
Domain-by-Domain Breakdown
The 50 scored questions are drawn from six content domains. Understanding relative weight lets you allocate study hours intelligently instead of spreading effort evenly across topics that aren't tested equally. For a deep dive into each area with sample question styles, see our full OK-ROOF Exam Domains Guide.
Domain 1: General Roofing Knowledge
Covers foundational terminology, materials science, and code-driven principles that apply across roof types before you specialize into low-slope or metal systems.
- Roofing terminology and material classifications
- Basic code references and installation standards
Domain 2: Low Slope Roofing (Largest Domain)
This is the single largest content area on the exam, covering built-up, modified bitumen, single-ply membrane, and related commercial low-slope systems. Expect the plurality of your scored questions here.
- Membrane system selection and installation sequencing
- Drainage, slope, and ponding-water considerations
- Seaming, flashing, and termination details specific to low-slope assemblies
Domain 3: Architectural Metal Roofing Systems and Sheet Metal Flashing
Tests knowledge of standing seam and architectural metal panel systems along with the sheet metal flashing details that tie roof penetrations, edges, and transitions together.
- Panel profiles, seaming methods, and expansion/contraction allowances
- Flashing details at valleys, walls, and penetrations
Domain 4: Moisture and Energy Control
Focuses on vapor retarders, insulation strategy, and how moisture management interacts with energy code compliance in commercial assemblies.
- Vapor drive and condensation risk in layered assemblies
- Insulation placement and R-value considerations
Domain 5: Repairs and Reroofing
Covers assessment of existing roof systems, tear-off decisions, and proper reroofing procedures over aged substrates.
- Evaluating existing systems before recover vs. tear-off decisions
- Sequencing repairs to avoid trapped moisture
Domain 6: Safety
Jobsite safety practices specific to commercial roofing, including fall protection and hazard awareness on low-slope and steep-slope work areas.
- Fall protection systems and anchor point requirements
- Hazard identification during tear-off and hot work
Because Low Slope Roofing carries the most weight, candidates who shortchange it in favor of memorizing metal panel specs tend to miss questions they should have gotten right. If you're unsure how difficult the overall exam feels relative to its domains, our article on how hard the OK-ROOF exam really is breaks down where candidates typically struggle.
Exam Format, Timing, and the Open-Book Advantage
The exam is computer delivered, open book, and includes 50 scored questions plus up to 10 unscored experimental items that PSI may embed to evaluate future questions - the time spent on those extra items does not count against your 2 hour 30 minute limit. That gives you roughly three minutes per scored question on average, which is workable if you know where to find answers quickly rather than trying to memorize the entire reference manual.
Because it's open book, your real skill isn't recall - it's navigation. Tab your reference material by domain topic (low-slope assemblies, flashing details, safety) so you're not flipping through hundreds of pages mid-exam. A silent, nonprinting, nonprogrammable calculator is permitted for any load, area, or measurement calculations.
A Domain-Weighted Study Timeline
A generic study calendar isn't useful here - your plan should mirror the domain weighting of the actual exam. Spend the most calendar time on Low Slope Roofing, then work outward. Techniques like spaced repetition and active recall work well, but only when applied to the right material at the right time.
General Roofing Knowledge + Low Slope Roofing (Part 1)
- Review core terminology and code fundamentals
- Begin membrane systems: built-up, modified bitumen, single-ply
Low Slope Roofing (Part 2) + Architectural Metal
- Drainage, seaming, and flashing details for low-slope systems
- Standing seam panels and sheet metal flashing basics
Moisture and Energy Control + Repairs/Reroofing
- Vapor retarders and insulation placement logic
- Recover vs. tear-off decision criteria
Safety + Full Review with Open-Book Reference Practice
- Fall protection and hazard scenarios
- Timed practice navigating your tabbed reference manual
Run through timed practice sessions on our OK-ROOF practice test platform to simulate the 2 hour 30 minute window and get comfortable with question phrasing before test day. For a condensed version of everything above, bookmark the OK-ROOF Cheat Sheet for last-minute review.
References You Need Open on Test Day
The current PSI candidate references for this exam point to the 2025 NRCA Steep Slope manual. Since the exam is open book, familiarity with this reference's structure - not just its content - is a genuine competitive advantage. Practice locating specific flashing details, fastening schedules, and installation sequences quickly rather than reading it cover to cover under time pressure.
| Exam Detail | Specification |
|---|---|
| Scored questions | 50 |
| Time limit | 2 hours 30 minutes |
| Passing score | 70% |
| Exam fee | $92 |
| Delivery format | Computer delivered, open book |
| Calculator policy | Silent, nonprinting, nonprogrammable |
| Possible unscored items | Up to 10 (time not counted) |
Don't Forget the Roofing Business and Law Exam
The technical exam covered in this guide is not the only test standing between you and your commercial endorsement. Oklahoma also requires a separate 50-question Roofing Business and Law examination. Many candidates study exclusively for the technical content and are caught off guard by the business and law requirement showing up late in the process - plan your study calendar to account for both exams, not just one.
Common First-Attempt Mistakes
- Underweighting Low Slope Roofing. Since it's the largest domain, treating it the same as smaller domains like Safety leaves points on the table.
- Not practicing with the actual reference manual. Open-book exams punish candidates who don't know how to navigate their materials quickly.
- Ignoring the calculator rule. Showing up with a programmable or printing calculator can create avoidable friction at check-in.
- Forgetting the insurance and business registration steps. Passing the exam doesn't matter if your $1 million liability coverage and Secretary of State registration aren't finalized.
- Skipping timed practice. With roughly three minutes per scored question, unpracticed pacing is a common reason candidates run short on time.
If you want a broader gut-check on whether the effort required matches the payoff, our analysis on whether OK-ROOF certification is worth it and the OK-ROOF Salary Guide cover the career upside, while OK-ROOF Jobs outlines who's hiring commercial-endorsed contractors across the state.
After You Pass: Renewal and CE
Passing the exam and receiving your endorsement isn't the end of the obligation. Annual renewal costs $75 for registration plus $100 for the commercial endorsement. Starting January 1, 2027, endorsement holders will also need to complete 4 continuing education hours annually to keep the commercial endorsement active - so factor that into your long-term planning even if it doesn't affect your first exam attempt. Check OK-ROOF Exam Dates 2026 for current testing windows and scheduling deadlines as you plan your first attempt.
Key Takeaway
Treat the endorsement as an ongoing compliance relationship, not a one-time test - renewal fees and, starting 2027, annual CE hours keep your commercial endorsement valid.
Frequently Asked Questions
There are 50 scored questions, with up to 10 additional unscored experimental questions possible. You have 2 hours 30 minutes total, and time spent on unscored items doesn't count against that limit.
Yes, the exam is computer delivered and open book. Candidates may also bring a silent, nonprinting, nonprogrammable calculator for calculations.
You need 70% correct on the 50 scored questions. For a detailed explanation of how scoring works, see our OK-ROOF Passing Score guide.
Start with Low Slope Roofing, since it's the largest domain on the exam, then move through Architectural Metal Roofing Systems, Moisture and Energy Control, Repairs and Reroofing, and Safety.
Yes. Oklahoma also requires a separate 50-question Roofing Business and Law examination in addition to the commercial technical exam covered in this guide.
Ready to test your domain knowledge against realistic questions? Start practicing on our OK-ROOF practice exam platform and pair it with the full OK-ROOF Study Guide for a structured path to your first-attempt pass.