- NV-C15 refers specifically to the Nevada C-15 Roofing and Siding Contractor Trade Exam, administered through PSI for the Nevada State Contractors Board.
- The trade portion has 60 scored questions in 120 minutes, and you need 45 correct (75%) to pass.
- Steep Roofing is the heaviest domain at 16 of 60 questions - plan study time accordingly.
- Fees run $95 for a single portion or $140 when the trade exam and CMS portion are taken together.
What Does NV-C15 Stand For?
On this site, NV-C15 is shorthand for the Nevada C-15 Roofing and Siding Contractor Trade Exam - the licensing examination that PSI administers on behalf of the Nevada State Contractors Board for anyone seeking a C-15 roofing and siding classification. It is not an abbreviation for a national certification, a manufacturer credential, or any other program that happens to share the same letters and number. If you searched for "NV-C15" and landed here expecting something else, this page - and every other article on this site - is specifically about the Nevada trade exam.
It's worth being precise about scope, too. PSI administers the full C-15 Roofing and Siding Contractor trade examination for this classification, not the narrower C-15a Roofing-only exam that some applicants confuse it with. The full C-15 exam covers siding work in addition to roofing systems, which matters when you're deciding what to study. For a broader definition of the credential itself, see NV-C15 Meaning and What Is NV-C15?.
Who Issues and Administers It
The Nevada State Contractors Board is the licensing authority; PSI is the testing vendor that builds, delivers, and scores the exam on computer at approved test centers. The current bulletin governing content, fees, and policy is dated March 25, 2026, and it's the authoritative source for anything exam-day related - question counts, timing, references, and calculator rules all trace back to that document.
Board approval has to happen before you can even schedule a seat. That sequencing trips people up: you don't register with PSI first and sort out licensing paperwork later. The Board reviews your application - including experience and other licensing requirements - and only after approval do you become eligible to book the exam. If you're still working through eligibility, the NV-C15 Requirements guide walks through what the Board looks for before it clears you to test.
What the Nine Domains Actually Cover
The C-15 trade exam blueprint is built around nine content domains. Understanding what each one actually tests - not just its name - is the difference between generic exam prep and NV-C15-specific prep.
Domain 3: Steep Roofing
This is the largest domain on the exam at 16 of 60 questions, making it worth more study time than any other single area. Expect questions on shingle and tile installation, fastening patterns, underlayment, ventilation, and slope-related code requirements.
- Master fastener spacing and exposure rules before anything else
- Know how slope affects underlayment and flashing choices
Domain 2: Roofing Substrates
Covers deck materials and preparation work that underlies every roofing system - the foundation questions a candidate needs before tackling installation-specific domains.
- Understand deck inspection and repair triggers
- Know substrate compatibility with different roofing systems
Domain 5: Elastomeric Roofing & Domain 6: Built-up Bituminous Roofing
These two domains test low-slope and membrane systems - materials, application sequencing, and common failure points that differ significantly from steep-slope work.
- Distinguish elastomeric coating application from BUR layering
- Know inspection points specific to membrane systems
Domain 7: Sheet Metal and Flashing & Domain 8: Siding
Flashing detail work and siding installation both require precision knowledge - these domains test the transitions and terminations that cause the most field callbacks.
- Know flashing details at valleys, walls, and penetrations
- Understand siding material types and fastening requirements
Rounding out the blueprint are Domain 1: Safety, Domain 4: Roofing Repairs, and Domain 9: Photovoltaic Systems - the last reflecting the increasing overlap between roofing work and solar installation in Nevada. For a complete breakdown of every domain with question distribution and study priority, see the NV-C15 Exam Domains 2026 guide.
Key Takeaway
Because Steep Roofing carries nearly a third of the scored questions on its own, candidates who under-study it are taking on outsized risk relative to every other domain combined.
Format, Fees, and Registration Mechanics
The trade exam itself consists of 60 scored questions, delivered in a computer-based, multiple-choice format, with 120 minutes allowed. To pass, you need 45 correct answers - a 75% threshold. PSI may also insert between 1 and 10 unscored experimental questions into your session; these look identical to scored items and are counted within the same 120-minute window, so there's no way to identify or skip them strategically. Treat every question as if it counts.
| Item | Detail |
|---|---|
| Scored questions | 60 |
| Time allowed | 120 minutes |
| Passing requirement | 45 correct (75%) |
| Possible unscored items | 1-10 (experimental) |
| Single portion fee | $95 |
| Trade + CMS portions together | $140 |
Fees are separate from broader licensing costs. A single exam portion runs $95, while sitting for the trade exam and the Contractor Management Survey (CMS) portion together costs $140. Retakes follow the same fee schedule - there's no discount for a second attempt, and you'll need to wait two weeks before rescheduling. Three failures void the application entirely, so retakes aren't unlimited. For the full cost picture including application and licensing fees beyond the exam itself, see NV-C15 Certification Cost 2026, and for the exact scoring math see NV-C15 Passing Score 2026.
Timing matters at the application stage too: required examinations must be completed within six months after you submit your application, so candidates who delay scheduling risk having to restart the licensing process.
What You Can and Can't Bring Into the Room
The C-15 exam is open book only for the listed 2018 International Building Code. NRCA manuals, OSHA references, and other listed study materials are useful for preparation but cannot be used during the exam itself - they're study-only resources, not reference materials for test day.
This distinction changes how you prep. If a fact lives only in an NRCA manual or OSHA reference, you need to memorize it, because you won't have that book at the testing center. If it's in the 2018 IBC, you can build a tabbing system now that will actually work for you during the exam. Candidates often underestimate how much time a well-organized code book saves versus one that's untouched.
Turning the Acronym Into a Study Plan
Once you understand what NV-C15 actually tests, the study plan should follow the domain weighting rather than a generic content outline. Steep Roofing deserves the most calendar time given its 16-question share; Safety, Roofing Repairs, and Photovoltaic Systems can be scheduled in shorter blocks since they carry less weight individually but still appear on every exam form.
Steep Roofing + Roofing Substrates
- Drill fastening patterns, underlayment, and deck prep together since they're sequential in real installations
- Tab your 2018 IBC sections relevant to slope and substrate requirements
Low-Slope Systems: Elastomeric & Built-up Bituminous
- Compare application sequencing side by side to avoid mixing up the two systems
- Review inspection failure points unique to membrane roofing
Sheet Metal, Flashing, Siding, and Repairs
- Focus on transition and termination details - the most commonly tested field scenarios
- Take a full-length timed practice run to test your 120-minute pacing
Safety, Photovoltaic Systems, and Review
- Close remaining gaps identified in earlier practice sessions
- Retest your code book tabbing system under timed conditions
This is a general study methodology adapted specifically to the NV-C15 blueprint - it's not meant to replace a full walkthrough. For a complete, domain-by-domain prep strategy, read the NV-C15 Study Guide 2026, and if you're trying to gauge how much effort the exam realistically requires, How Hard Is the NV-C15 Exam? breaks down the difficulty factors in more detail.
Who Actually Uses an NV-C15 License
Holding a C-15 license lets a contractor legally bid and perform roofing and siding work across Nevada under their own name - rather than working as an employee under someone else's license. That distinction matters to roofing crews, siding installers, and small contracting businesses looking to operate independently, bid public and private projects, and take on supervisory or ownership roles rather than remaining in a subordinate trade position.
Because the exam blueprint includes a dedicated Photovoltaic Systems domain, the license also has relevance for contractors expanding into solar-adjacent roofing work - an increasingly common overlap as more residential and commercial roofing jobs include panel-ready installation considerations. If you're curious how licensing translates into real job opportunities, NV-C15 Jobs covers the kinds of roles and business paths this credential opens up.
Before you get to that point, though, the licensing process itself has several separate moving parts beyond the exam: experience verification, a resume or accepted alternative evidence, financial documentation, and applicable bonding. The trade qualifier generally needs four years of relevant journey-level, foreman, supervisory, or contractor experience within the preceding fifteen years, though approved education can substitute for up to three of those years. None of that paperwork is optional, and the Board reviews it before exam scheduling is even possible.
Key Takeaway
Passing the NV-C15 exam is one requirement among several - experience documentation, bonding, and application fees all run alongside it, so budget time and money for the full licensing process, not just the test.
If you want to see how your prep stacks up against realistic exam conditions before test day, working through timed practice questions on our NV-C15 practice test platform is one of the more direct ways to check domain-by-domain readiness. Reviewing missed questions by domain - rather than just an overall score - tends to reveal exactly where Steep Roofing or another heavily weighted area needs more attention. You can also cross-check your pacing and confidence against the NV-C15 Pass Rate 2026 data and decide whether it's worth pursuing at all with the Is the NV-C15 Certification Worth It? analysis.
Frequently Asked Questions
No. On this site, NV-C15 refers specifically to the Nevada C-15 Roofing and Siding Contractor Trade Exam administered by PSI for the Nevada State Contractors Board. It is not affiliated with any other credential that shares similar letters or numbers.
No. PSI administers the full C-15 Roofing and Siding Contractor trade examination for this classification, which is broader than the narrower C-15a Roofing-only exam. Make sure you're studying for the correct version before scheduling.
The blueprint contains 60 scored questions with 120 minutes allowed, and you need 45 correct answers (75%) to pass. PSI may add up to 10 additional unscored experimental questions within the same time limit.
Steep Roofing is the largest domain at 16 of the 60 scored questions, making it the single highest-priority area to master before test day.
The exam is open book only for the listed 2018 International Building Code, and only pre-exam highlighting, underlining, and permanent tabs are allowed. Handwritten notes and loose inserted papers are prohibited, whether added before or during the test.