- Overview: What OK-ROOF Actually Is
- Who Issues and Administers the Exam
- Exam Format and Question Style
- The Six Content Domains
- Eligibility and Registration Requirements
- Fees, Endorsement Costs, and Renewal
- Who Hires Commercial-Endorsed Roofers
- How to Approach Studying by Domain
- The 2027 Continuing Education Change
- Frequently Asked Questions
- OK-ROOF is the Oklahoma Construction Industries Board's Commercial Endorsement Examination, administered by PSI for $92.
- The exam has 50 scored questions (plus up to 10 unscored) in 2 hours 30 minutes; passing requires 70%.
- Low Slope Roofing is the largest of six domains and deserves the most study time.
- Applicants need an active Oklahoma roofing registration, a qualifying party, $1 million liability coverage, and workers compensation.
Overview: What OK-ROOF Actually Is
OK-ROOF stands for the Oklahoma Roofing Contractor Commercial Endorsement Examination - a specific credentialing test tied to Oklahoma's roofing contractor registration system. It is not a generic national roofing certification; it is a state-specific commercial endorsement that allows a registered Oklahoma roofing contractor to legally bid, contract for, and perform commercial roofing work under state law. If you already hold a residential roofing registration and want to expand into commercial low-slope, metal, or reroofing projects, this is the exam that unlocks that authority.
Because the name "OK-ROOF" is used loosely online, it's worth being precise: this article, and this entire site, covers only the Oklahoma commercial roofing endorsement exam administered through the Oklahoma Construction Industries Board (CIB) and PSI testing services. If you've landed here after researching a different credential with the same acronym, the facts below apply strictly to the Oklahoma version.
Who Issues and Administers the Exam
The Oklahoma Construction Industries Board is the state agency that issues the commercial roofing endorsement credential itself. PSI, a third-party testing organization, is contracted to actually deliver the technical examination at computer-based testing centers. This two-party structure is common in state licensing: the board sets the eligibility rules and issues the endorsement, while PSI builds and proctors the exam content.
Candidates should not confuse the technical exam covered here with the separate Roofing Business and Law examination, which is also a 50-question test but focuses on Oklahoma statutes, contracting rules, and business practices rather than roofing craft knowledge. Both exams are required to obtain the commercial endorsement, but they test very different material. For a full breakdown of what qualifies you to sit for either exam, see OK-ROOF Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format and Question Style
The commercial roofing technical exam is built around practical, scenario-based questions rather than abstract theory. Candidates should expect:
- 50 scored questions, with up to 10 additional unscored experimental items mixed in - you won't know which are which, and the time spent on experimental items does not count against your limit.
- 2 hours 30 minutes total testing time, delivered on computer at a PSI test center.
- 70% passing score required on the scored portion.
- Open-book format - but this only helps if you already know where to look; the clock does not stop while you flip through reference material.
- A silent, nonprinting, nonprogrammable calculator is permitted for load, slope, and material-quantity calculations.
The "open book" detail surprises a lot of first-time candidates into thinking the exam will be easy. In practice, the opposite is true: because the exam allows references, PSI can ask denser, more application-heavy questions that assume you'll need to cross-check a manual under time pressure. Understanding exactly how hard this makes the exam is covered in How Hard Is the OK-ROOF Exam? Complete Difficulty Guide 2026.
Key Takeaway
Open-book does not mean open-time. Know your reference manual's structure well enough to find an answer in under a minute, not five.
The Six Content Domains
OK-ROOF's technical exam is organized into six domains, each representing a distinct slice of commercial roofing knowledge. Understanding the relative weight of each domain is the single most important planning step before you open a study guide.
Domain 1: General Roofing Knowledge
Foundational terminology, materials science, and code-driven concepts that apply across every roofing system type.
- Roofing vocabulary and system components
- General code and manufacturer specification references
Domain 2: Low Slope Roofing
The largest domain on the exam. Candidates must be comfortable with membrane systems, seaming methods, drainage design, and installation sequencing for commercial low-slope roofs.
- Single-ply, modified bitumen, and built-up roofing details
- Drainage slope and ponding water considerations
Domain 3: Architectural Metal Roofing Systems and Sheet Metal Flashing
Covers panel systems, seam types, expansion/contraction allowances, and flashing details at penetrations and transitions.
- Standing seam and exposed-fastener panel differences
- Flashing at walls, curbs, and roof edges
Domain 4: Moisture and Energy Control
Vapor retarders, insulation strategy, and moisture management in assemblies exposed to Oklahoma's climate swings.
- Vapor drive and condensation risk
- Insulation placement relative to the roof membrane
Domain 5: Repairs and Reroofing
Diagnosing failure modes, tear-off decisions, and recover versus replace judgment calls on existing commercial roofs.
- Leak diagnosis and root-cause identification
- Recover system compatibility rules
Domain 6: Safety
Fall protection, jobsite hazard awareness, and safe handling of roofing equipment and materials on commercial sites.
- Fall protection system requirements
- Hazard recognition on active roofing jobsites
Because Low Slope Roofing carries the most weight, it should anchor your study plan. For a domain-by-domain walkthrough with more granular subtopics, see OK-ROOF Exam Domains 2026: Complete Guide to All 6 Content Areas.
Eligibility and Registration Requirements
Before you can even schedule the technical exam, Oklahoma requires several eligibility steps to be satisfied:
- 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 and active workers compensation insurance.
- Pass the separate Roofing Business and Law examination (50 questions) in addition to the technical exam.
None of these steps are optional shortcuts - the CIB checks registration status and insurance documentation before the commercial endorsement is issued, regardless of your exam score. If you're unsure whether your current registration status qualifies you to sit for the exam, walk through the full checklist in OK-ROOF Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Fees, Endorsement Costs, and Renewal
OK-ROOF involves several distinct fees that are easy to underestimate if you only budget for the exam itself:
| Item | Cost |
|---|---|
| Commercial roofing technical exam (PSI) | $92 |
| Initial roofing registration | $75 |
| Initial commercial endorsement | $230 |
| Annual registration renewal | $75 |
| Annual commercial endorsement renewal | $100 |
Add in the required $1 million liability policy and workers compensation coverage, and the real cost of obtaining and maintaining the endorsement extends well beyond the exam fee. A full line-item breakdown, including how the numbers compare across the first year versus ongoing renewal years, is available in OK-ROOF Certification Cost 2026: Complete Pricing Breakdown. Passing on the first attempt is the best way to keep this budget predictable - retake fees add up quickly for a two-part exam requirement.
Who Hires Commercial-Endorsed Roofers
The commercial endorsement exists specifically because low-slope, metal, and large-scale commercial roofing work involves different systems, tolerances, and safety exposure than residential shingle work. Contractors who earn the endorsement typically pursue work with:
- General contractors managing new commercial construction with membrane or metal roof systems
- Property management companies overseeing reroofing and repair on retail, office, or warehouse buildings
- Facility owners needing reroofing or recover work rather than residential repairs
- Roofing companies expanding their service lines from residential into commercial bids
Because commercial contracts tend to be larger in scope and value than residential jobs, the endorsement often changes the type of client a roofing business can pursue, not just the type of roof it can legally install. For a closer look at how this credential affects earning potential and job opportunities, see OK-ROOF Salary Guide 2026: Complete Earnings Analysis and OK-ROOF Jobs.
How to Approach Studying by Domain
Because Low Slope Roofing is the largest domain, it deserves the largest block of dedicated study time - not an equal split across all six areas. A reasonable way to sequence preparation is to front-load the heaviest domain first, then move into related but smaller domains before finishing with Safety and General Roofing Knowledge, which draw on concepts already reinforced elsewhere.
Low Slope Roofing Deep Dive
- Membrane types, seaming, and drainage design
- Practice scenario questions using the current NRCA references
Metal Systems and Moisture Control
- Standing seam vs. exposed-fastener panel details
- Vapor retarder placement and insulation strategy
Repairs, Reroofing, and Safety
- Diagnosing leaks and choosing recover vs. replace
- Fall protection and jobsite hazard scenarios
Full-Length Review and Timing Practice
- Simulate the 2 hour 30 minute window with reference lookups
- Review General Roofing Knowledge terminology gaps
This sequencing isn't a generic template - it's built around the actual weighting of OK-ROOF's six domains. For a more detailed week-by-week plan with specific resource recommendations, see OK-ROOF Study Guide 2026: How to Pass on Your First Attempt. You can also test your readiness against realistic scenario questions at our practice test platform before scheduling the real exam.
The 2027 Continuing Education Change
Starting January 1, 2027, Oklahoma will require 4 continuing education hours annually to maintain the commercial endorsement. This is a new requirement layered on top of the existing renewal fees, so contractors currently holding or pursuing the endorsement should plan ahead for how they'll fulfill CE hours each year rather than treating renewal as a simple fee payment. If you're evaluating whether to pursue the endorsement now versus waiting, this upcoming CE requirement is worth factoring into your decision - see Is the OK-ROOF Certification Worth It? Complete ROI Analysis 2026 for a fuller cost-benefit picture.
Key Takeaway
Budget not just for the initial $230 endorsement fee, but for the ongoing $100 annual renewal plus 4 CE hours once the 2027 requirement takes effect.
Frequently Asked Questions
No. OK-ROOF is a commercial endorsement layered on top of an existing Oklahoma roofing registration. It specifically authorizes commercial roofing work in addition to whatever residential registration you already hold.
There are 50 scored questions, plus potentially up to 10 additional unscored experimental questions mixed in without identification, within a 2 hour 30 minute testing window.
You need 70% on the scored portion of the exam. For a detailed explanation of how this score is calculated and what it means for missed questions, see OK-ROOF Passing Score 2026: Exactly What You Need to Pass.
Yes. A separate 50-question Roofing Business and Law examination is required alongside the technical exam before the commercial endorsement is issued.
Testing is delivered on computer through PSI. For scheduling windows and planning tips, review OK-ROOF Exam Dates 2026: Testing Windows, Deadlines & Scheduling, and reinforce your knowledge with practice questions at our practice test site beforehand.