Oklahoma Roofing Contractor Commercial Endorsement

Oklahoma Roofing Contractor Commercial Endorsement Exam: What You Need to Know in 2026

You've put in the work on roofing jobs. Now you need to prove it on paper. The Oklahoma Roofing Contractor Commercial Endorsement exam is what stands between you and the credentials that open up commercial work in the state. Pass it, and you've got an Oklahoma roofing license that backs your experience with something official. This guide covers the exam format, every topic area, sample questions, the books you need, and exactly how to prepare — so you walk in ready.

Exam Overview

The exam is administered by PSI. Here's what you're looking at:

• Questions: 50 scored questions
• Time limit: 150 minutes
• Passing score: 70%, which means 35 correct answers out of 50
• Format: Multiple-choice, open book

Yes, open book — but don't let that make you complacent. You won't have time to look up everything. The exam is designed so that if you haven't already worked through the material, the clock will beat you. Know your references well enough to find answers fast.

You take this exam at a PSI test center. Bring your own approved references — pre-tabbed and highlighted — and a valid photo ID. No writing in the books during the exam.

For full details on scheduling and eligibility, check the official exam bulletin and the state licensing website.

Topics Covered on the Exam

Here's the full breakdown by topic area and number of exam items. Study time should follow these weights — more items on the exam means more priority in your prep.

Low Slope Roofing — 15 items
The heaviest section. Covers membrane types (BUR, modified bitumen, EPDM, thermoplastic, liquid-applied, SPF), deck requirements, rigid insulation, slope and drainage rules, and vapor and air retarder design. Know this section cold.

Safety — 8 items
OSHA 29 CFR 1926 is your reference here. Fall protection, personal fall arrest systems, guardrails, safety nets, warning line systems, and ladder requirements. These questions are based on specific OSHA standards — exact numbers and specs matter.

Repairs and Reroofing — 7 items
When can you re-cover versus tear off? How do you inspect an existing system? What do the IBC rules say about reroofing? This section tests your ability to evaluate real conditions and apply code correctly.

Architectural Metal Roofing Systems and Sheet Metal Flashing — 9 items
Metal types, panel classifications, seam types (standing seam, flat seam, batten seam), underlayment requirements, and flashing details — copings, counterflashing, drip edge, through-wall flashing.

Moisture and Energy Control — 6 items
Thermal resistance calculations (R-value, U-factor, k-factor, C-factor), vapor retarder placement, dew-point analysis, air retarder requirements under IECC and ASHRAE 90.1, and condensation control.

General Roofing Knowledge — 5 items
Roof system classifications, slope thresholds, IBC fire ratings (Class A, B, C), and wind resistance requirements. Fewer items, but foundational — don't skip it.

Sample Questions

Here are five questions pulled from the topic areas you'll face. Work through them — and no peeking at answer keys. The point is to see how these questions are framed.

Question 1 — Low Slope Roofing (Medium)

A roofing contractor is performing a roof recover on a commercial building. During the tear-off, the crew discovers an existing ice barrier membrane adhered directly to the roof deck. What action is permitted regarding this existing ice barrier membrane?

• A) Remove it entirely and install a new ice barrier membrane on the bare deck
• B) Leave it in place and cover it with an additional layer of ice barrier membrane
• C) Apply a liquid primer over it before installing insulation directly on top
• D) Leave it in place without adding any additional ice barrier membrane layer

Question 2 — General Roofing Knowledge (Hard)

In Groups R-2 and R-3 with Type III, IV, or V construction, a 1-hour fire-resistance-rated exterior wall may terminate at the underside of the roof sheathing with a Class C roof covering if certain conditions are met. One permitted method requires fire-retardant-treated wood roof sheathing or deck for what minimum distance?

• A) 10 feet
• B) 8 feet
• C) 6 feet
• D) 4 feet

Question 3 — Repairs and Reroofing (Medium)

During a reroofing evaluation, when a compact roof system with insulation above the deck is encountered, what method may be necessary to verify the type of roof construction if composition cannot be easily identified?

• A) Measuring the overall roof assembly thickness at ridge vents
• B) Reviewing the original building permit specifications on file
• C) Removing the drip edge or fascia, or cutting into the assembly
• D) Conducting a thermal imaging scan of the entire roof surface

Question 4 — Repairs and Reroofing (Easy)

A roofing contractor is evaluating whether an existing roof system is a candidate for re-cover. Which of the following conditions makes a roof recover NOT permitted under the building code?

• A) The existing roof covering is a mechanically attached thermoplastic single-ply membrane
• B) The existing roof assembly uses a ballasted single-ply membrane system
• C) The existing roof covering has deteriorated to the point that it is not adequate as a base for additional roofing
• D) The existing roof covering is a built-up roof with mineral cap sheet surfacing

Question 5 — Low Slope Roofing (Hard)

Thermoset single-ply roof coverings must comply with which material standard(s)?

• A) ASTM D4637 or ASTM D5019
• B) ASTM D6162 or ASTM D6163
• C) ASTM C836 or ASTM C957
• D) ASTM D4434 or ASTM D6754

Don't just guess — try our free practice exam to see how you'd actually score before test day.

What Types of Questions to Expect

This is a solid Oklahoma roofing study guide breakdown of question types by topic:

General Roofing Knowledge (38 practice questions): Questions on slope thresholds, fire assembly classifications, and IBC wind resistance specs. You'll need to know the difference between Class A, B, and C ratings and what each requires.

Low Slope Roofing (90 practice questions): The largest section in our practice bank mirrors the heaviest section on the real exam. Expect questions on EPDM vs. thermoplastic attachment methods, insulation layer sequencing, slope and drainage minimums, and vapor retarder placement rules.

Architectural Metal Roofing Systems and Sheet Metal Flashing (73 practice questions): Questions test metal properties, seam type identification, and specific flashing installation details. Know the difference between architectural and structural panel systems, and when each seam type applies.

Moisture and Energy Control (38 practice questions): Calculation-based questions on R-value, U-factor, and k-value. You'll also see questions on dew-point analysis and how to determine vapor retarder placement for a given climate condition.

Repairs and Reroofing (71 practice questions): These questions ask you to make judgment calls: when is re-cover allowed, what disqualifies a roof from re-cover, how do you assess moisture in an existing assembly, and what do nondestructive evaluation techniques actually tell you.

Safety (40 practice questions): OSHA-specific questions with exact numbers — minimum guardrail heights, anchor strength requirements, warning line setback distances, ladder angle ratios. The details count here.

Total across all topics: 350 practice questions in our full bank.

Study Materials

This is an open-book exam, so having the right references — and knowing them — is the job.

Required references allowed in the exam room:

• IBC 2018 — International Building Code with Oklahoma Revisions. Fire classifications, wind resistance, reroofing limitations — a lot of the exam runs through this book.
• OSHA 29 CFR 1926 — The construction industry safety standard. Every Safety section question comes from here. Know the subparts on fall protection inside and out.
• NRCA Roofing Manual: Steep Slope Roof Systems — Covers steep-slope systems in depth. The 2026 edition is accepted.

Organize your references before exam day:

• Redi-Tag Permanent Colored Tabs — 100 laser tabs in five colors. Use them to color-code by subject across your books. Permanent adhesive means they stay put through exam day.
• Sharpie Highlighters — 12-pack in assorted colors. Highlight key code sections, tables, and definitions while you study. The chisel tip works well for marking table rows.

You're allowed to highlight, underline, and tab your books before the exam. Do it. An unorganized reference book under time pressure is nearly as useless as no book at all.

Study Tips

Here's what actually works for roofing exam prep for PSI:

Practice the exam format, not just the content. Reading the material cover to cover usually isn't enough to pass. This is a multiple-choice test, and multiple choice rewards practice. The more questions you work through under real conditions, the more the terminology and question style become second nature.

Take the practice exam more than once. Every attempt pulls different questions from the pool. The goal is to consistently clear 70% or better — so hitting that number starts to feel routine before you sit for the real thing.

Tab your books now. Go through each reference and tab the sections most likely to be tested: IBC Chapter 15 (roof assemblies), OSHA Subpart R (steel erection) and Subpart M (fall protection), NRCA system details. Color-code by topic.

Don't skip Safety. Eight items is a significant chunk. OSHA questions often hinge on a specific measurement or load requirement — the kind of detail you can't reconstruct from general knowledge.

Know your low-slope section cold. Fifteen items. If you lose most of that section, you probably fail. Prioritize it.

Frequently Asked Questions

How many questions are on the Oklahoma Roofing Contractor Commercial Endorsement exam, and how long do I have?
The exam has 50 scored questions. You have 150 minutes to complete it.

What is the passing score?
You need to answer 70% of questions correctly — that's 35 out of 50 scored items.

What topics does the exam cover?
Six areas: General Roofing Knowledge, Low Slope Roofing, Architectural Metal Roofing Systems and Sheet Metal Flashing, Moisture and Energy Control, Repairs and Reroofing, and Safety.

How much does the exam cost?
The exam fee is $92 per examination portion. This fee is non-refundable and non-transferable, whether it's your first attempt or a retest.

How do I register?
Once the Oklahoma Construction Industries Board approves your application, you can schedule through the exam registration page or by calling PSI at (855) 834-8750. You'll need your OK Con ID number from the Board to create your account.

Is the exam open book?
Yes. Bring your own approved references. You can highlight, underline, and tab them with permanent tabs before the exam — but you cannot write in them during the test.

What references are allowed in the exam room?
The Architectural Sheet Metal Manual (2012, SMACNA), IBC 2018 with Oklahoma Revisions, NRCA Roofing Manual: Membrane Roofing Systems (2023), NRCA Roofing Manual: Metal Panel and SPF Roof Systems (2026), NRCA Roofing Manual: Steep Slope Roof Systems (2021 or 2026), NRCA Roofing Manual: Architectural Metal Flashing Condensation and Air Leakage Control, and Reroofing (2022), and OSHA 29 CFR Part 1926.

What's the retake policy if I fail?
After a first failure, wait 30 days before retesting. After a second failure (and any failure after that), the wait is 90 days.

Does my exam eligibility expire?
No. The exam bulletin states there is no expiration on eligibility once you're approved.

What ID do I need on exam day?
One valid, non-expired, signature-bearing photo ID. Acceptable forms include a state-issued driver's license, state ID card, US passport, US military ID, US alien registration card, or Canadian government-issued ID.

Get Started

You know the format, you know the topics, and you know what references to bring. Now do the work. Start with the free practice exam — 10 questions, no account needed — to get a feel for the format and where you stand. When you're ready to train seriously, the full practice exam mirrors the real test: 50 questions, 150-minute timer, same topic breakdown, with a score report that tells you exactly where to focus. Get your books tabbed, put in the reps, and go get your Oklahoma roofing license.