- NV-C15 refers to the Nevada State Contractors Board's C-15 Roofing and Siding Contractor trade exam, administered by PSI.
- The exam has 60 scored questions, a 120-minute limit, and requires 45 correct (75%) to pass.
- PSI may insert up to 10 unscored experimental items without extending your time.
- Steep Roofing is the heaviest domain at 16 of 60 questions.
What Is A NV-C15, Exactly?
NV-C15 is the working identifier for the Nevada C-15 Roofing and Siding Contractor Trade Exam - the licensing examination that the Nevada State Contractors Board requires of applicants who want to hold a C-15 roofing and siding contractor license in the state. It is not a narrower roofing-only exam and it is not a credential from some other industry group; it is specifically the full C-15 trade test covering roofing substrates, steep roofing, repairs, elastomeric and built-up bituminous systems, sheet metal, siding, and photovoltaic installations tied to roofing work.
If you've landed here after searching a similar-sounding acronym elsewhere, note the distinction carefully. This site, and this article, deal exclusively with the Nevada Contractors Board's C-15 trade examination. For a plain-language breakdown of the name itself, see NV-C15 Meaning and What Does NV-C15 Stand For?.
Who Administers the NV-C15 Exam
The Nevada State Contractors Board owns the licensing requirement, but the actual test delivery - scheduling, proctoring, scoring, and bulletin publication - falls to PSI. PSI's current bulletin governing this exam is dated March 25, 2026, and it spells out the blueprint, allowed references, and testing rules discussed throughout this article.
Before you can even book a seat, the Board has to approve your application. That approval gate matters: you cannot walk into a PSI test center on a whim. If you want the fuller mechanics of who qualifies and what documentation the Board wants, read NV-C15 Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format and Scoring Mechanics
The C-15 trade exam is a computer-delivered, multiple-choice test. Candidates answer 60 scored questions within a 120-minute window, and passing requires 45 correct answers - exactly 75%. PSI reserves the right to seed the exam with 1 to 10 additional unscored, experimental questions, but these are folded into the same time allotment, so you won't know which questions count and which don't.
Key Takeaway
Because unscored items are mixed in invisibly, treat every question - even ones that feel oddly worded or off-topic - as if it counts toward your 45-correct target.
For a deeper dive into what "passing" actually means numerically and how the 75% threshold interacts with the 60-question blueprint, see NV-C15 Passing Score 2026: Exactly What You Need to Pass. If you're trying to gauge how tough this actually is relative to your background, How Hard Is the NV-C15 Exam? Complete Difficulty Guide 2026 walks through that in detail, and NV-C15 Pass Rate 2026: What the Data Shows covers what's publicly known about outcomes.
The 9 Domains Behind the NV-C15
The exam blueprint is organized into nine domains. Some carry far more weight than others, which should directly shape how you allocate study time.
Domain 3: Steep Roofing (Largest Domain - 16 of 60 questions)
This is the single heaviest domain on the exam by a wide margin, covering asphalt shingle, tile, and other sloped-roof systems, installation sequencing, and code-driven detailing.
- Underlayment selection and lap requirements
- Fastening patterns and exposure calculations
- Flashing integration at valleys, hips, and penetrations
Domain 1: Safety
Jobsite and fall-protection knowledge that applies across every other roofing system covered on the exam.
- Fall protection thresholds and anchor points
- Ladder and scaffold setup on sloped surfaces
- Hazard communication for roofing materials
Domains 2, 4-9: Substrates, Repairs, and Specialty Systems
The remaining domains - Roofing Substrates, Roofing Repairs, Elastomeric Roofing, Built-up Bituminous Roofing, Sheet Metal and Flashing, Siding, and Photovoltaic Systems - round out the blueprint with smaller but still testable slices.
- Substrate compatibility and deck preparation
- Repair diagnostics versus full replacement decisions
- Elastomeric coating application and cure conditions
- Built-up bituminous layering and hot/cold application methods
- Sheet metal fabrication, flashing details, and expansion joints
- Siding material selection, fastening, and weatherproofing
- Photovoltaic mounting penetrations and roof integration concerns
For a domain-by-domain walkthrough with study priorities mapped to each content area, see NV-C15 Exam Domains 2026: Complete Guide to All 9 Content Areas.
Fees, Registration, and Scheduling
Understanding the fee structure up front avoids surprises at scheduling time. PSI charges $95 if you're sitting for a single examination portion, or $140 if you're taking the trade exam together with the separate Contractor Management Survey (CMS) portion. Retakes follow this identical fee schedule - there's no discounted retake rate.
| Scenario | Fee |
|---|---|
| Single exam portion (trade or CMS) | $95 |
| Trade exam + CMS together | $140 |
| Retake (any portion) | Same schedule as above |
Beyond the exam fee itself, licensing carries its own separate costs: a $300 application fee, and $600 for initial licensing plus the same amount again biennially at renewal, with Residential Recovery Fund charges billed separately where applicable. A full cost breakdown, including how these pieces stack up over a licensing cycle, is available in NV-C15 Certification Cost 2026: Complete Pricing Breakdown.
Scheduling itself can't happen until the Board approves your application; only then does PSI open a seat for you. For a rundown of testing windows and how far in advance to plan, check NV-C15 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Who Needs This Credential
The C-15 license is aimed at people running or supervising roofing and siding work in Nevada - journey-level roofers stepping into a contractor role, foremen, supervisors, and existing contractors adding a roofing/siding classification. 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.
Licensing isn't just the exam. The Board also wants experience verification, a resume or accepted alternative evidence of your work history, financial documentation, and applicable bonding before a license is issued. If you're mapping out whether you currently qualify, NV-C15 Requirements 2026: Eligibility, Prerequisites & How to Qualify lays out each piece in sequence.
Employers who hire for this credential tend to be roofing and siding contracting companies looking for someone who can legally pull permits and run jobs as a licensed contractor, rather than an employee. If you're weighing career impact, NV-C15 Jobs and NV-C15 Salary Guide 2026: Complete Earnings Analysis cover what the license opens up on the employment side, and Is the NV-C15 Certification Worth It? Complete ROI Analysis 2026 weighs the costs against the benefits.
What You Can and Cannot Bring
The NV-C15 exam is open book only for the listed 2018 International Building Code - that's the sole reference you're allowed to consult during the test itself. Materials like NRCA manuals, OSHA publications, and other listed references are valuable for preparation, but they're study-only; you cannot open them during your session.
- Allowed before testing: highlighting, underlining, and permanent tabs placed in your code book ahead of time.
- Not allowed: handwritten notes made before or during the exam, and any added loose papers or inserts.
- Calculators: a silent, nonprinting, nonprogrammable calculator is permitted.
Key Takeaway
Prep your 2018 IBC copy with tabs and highlights weeks in advance - you won't get a chance to annotate it once you're seated at the terminal.
Building a Domain-Aware Study Plan
Because Steep Roofing carries 16 of the 60 scored questions, it deserves the largest single block of your study time, followed by Safety and the remaining seven domains distributed across the balance of your prep. A generic week-by-week grind isn't useful here - what matters is sequencing study around the blueprint's actual weight.
Steep Roofing + Safety
- Master shingle, tile, and sloped-system installation details
- Review fall protection and jobsite hazard scenarios
Substrates, Repairs, Sheet Metal and Flashing
- Work through deck preparation and compatibility questions
- Practice flashing and sheet metal detailing scenarios
Elastomeric, Built-up Bituminous, Siding, Photovoltaic
- Cover coating and hot/cold application methods
- Review siding fastening and PV mounting penetration rules
Code Navigation and Timed Practice
- Practice locating sections in your tabbed 2018 IBC quickly
- Run full-length timed sessions under the 120-minute limit
For a structured week-by-week walkthrough that goes deeper on each phase, see NV-C15 Study Guide 2026: How to Pass on Your First Attempt. A condensed reference for last-minute review is available at NV-C15 Cheat Sheet 2026: One-Page Review of Must-Know Facts, and structured coursework options are outlined in NV-C15 Training.
Whichever plan you follow, practicing under real exam conditions matters more than passive review. Running full-length timed sets on our NV-C15 practice test platform is the closest simulation you'll get to the actual PSI testing experience before exam day.
Frequently Asked Questions
It identifies the Nevada C-15 Roofing and Siding Contractor Trade Exam administered by PSI on behalf of the Nevada State Contractors Board. See What Is NV-C15? for more context.
There are 60 scored questions with a 120-minute time limit. PSI may add up to 10 unscored experimental questions within that same window.
You need 45 correct answers out of 60 scored questions, which is 75%. Full detail is in NV-C15 Passing Score 2026: Exactly What You Need to Pass.
No. Handwritten notes and added papers are prohibited. You may only pre-tab, highlight, and underline your 2018 International Building Code before testing.
Retakes are allowed after a two-week wait and follow the same $95/$140 fee schedule, but three failed attempts void the application entirely, so plan retakes carefully.