Nevada C-15 licensing note: the full C-15 Roofing and Siding classification is broader than roofing alone. Nevada regulations include roofing, siding, insulation and waterproofing within the C-15 family of work.
What Is the Nevada C-15 Roofing and Siding Contractor License?
The Nevada C-15 classification is a specialty contractor license regulated by the Nevada State Contractors Board. It covers exterior systems that help keep structures watertight, weatherproof and protected from the elements.
The full C-15 classification includes the work authorized under its roofing, siding, insulation and waterproofing subclassifications. That makes the C-15 trade exam broader than the C-15A Roofing-only examination.
Candidates should be ready for questions involving steep-slope roofing, roof substrates, repairs, low-slope systems, siding, flashing, safety and roof-mounted photovoltaic system considerations.
C-15: full Roofing and Siding classification with roofing, siding, insulation and waterproofing scope.
C-15A: roofing-only subclassification.
Testing: Nevada determines eligibility and PSI administers the examination.
The Nevada C-15 Roofing and Siding Contractor Online Exam Prep Course is built around roofing and siding trade knowledge, code navigation and timed contractor exam preparation.
Nevada C-15 Contractor Licensing and Exam Path
The trade exam is one part of the Nevada State Contractors Board licensing process.
| Step | Authority / Requirement | What to Verify |
|---|---|---|
| C-15 Classification | Nevada State Contractors Board | That the full Roofing and Siding classification matches the work your business plans to contract |
| Trade Qualification | Trade Qualified Individual | Four years of qualifying experience within the 15 years before application |
| Management Qualification | Nevada CMS Business and Law | Whether your Management Qualified Individual must complete the CMS examination or qualifies for a waiver |
| C-15 Trade Examination | PSI | Current examination authorization, testing rules and reference requirements |
| Financial Responsibility | Nevada State Contractors Board | Current financial statement, bank verification and license-limit requirements |
| Final Licensing | Nevada State Contractors Board | Bond, fingerprints, application documentation and any remaining Board requirements |
Research Authority and Citation Count
The page separates current PSI exam information, Nevada licensing requirements and 1 Exam Prep study resources.
| Verified Point | Citation Authority Count | Research Result |
|---|---|---|
| C-15 classification scope | 2 primary Nevada / PSI sources | Full C-15 includes roofing, siding, insulation and waterproofing work within the classification scope |
| Current C-15 exam format | 1 current PSI C-classification bulletin | 60 scored questions, 45 correct to pass and 2 hours |
| Current C-15 content outline | 1 current PSI bulletin | Nine current subject areas including siding and photovoltaic systems |
| Open-book reference | 1 current PSI bulletin | International Building Code, 2018 is the reference currently allowed in the C-15 trade examination |
| Trade experience | 3 official Nevada State Contractors Board sources | Four years of qualifying trade experience within the previous 15 years |
| 1 Exam Prep C-15 resources | Multiple direct 1 Exam Prep product and collection pages | Online exam prep, exam books, approved exam-room reference packages and broader licensing resources |
About impressions: private Google Search Console impressions, private backlink counts and proprietary authority scores are not public data. The authority counts above describe the sources actually used to verify page content.
Nevada C-15 Roofing and Siding Contractor Exam Breakdown
The current Nevada C-15 trade exam contains 60 scored questions and allows two hours. Candidates need at least 45 correct answers to meet the current passing standard.
Steep Roofing is the largest category with 16 questions. Roofing Substrates and Siding contain eight questions each. Elastomeric Roofing and Built-Up Bituminous Roofing contain seven each.
The remaining categories include Safety, Roofing Repairs, Sheet Metal and Flashing, and Photovoltaic Systems. That means a candidate who studies only shingles may discover, rather rudely, that the exam also remembers siding, membranes, flashing and solar-related roof conditions exist.
License Nevada C-15 Roofing and Siding Contractor
Licensing Authority Nevada State Contractors Board
Testing Provider PSI
Questions 60 scored questions
Passing Score 45 correct answers / 75%
Time Allowed 2 hours
Exam Format Computer-based, open-book trade examination
Allowed Trade Reference International Building Code, 2018
Trade Experience 4 years of qualifying experience within the previous 15 years
Business & Law Nevada Contractor Management Survey for the Management Qualified Individual unless an applicable waiver is approved
How to Study for the Nevada C-15 Roofing and Siding Exam
The exam combines roofing trade knowledge with code navigation. A good study plan should train you to recognize the system first and use the International Building Code only when a lookup is actually needed.
Prioritize steep roofing. It is the largest current exam category and covers common steep-slope materials, underlayments, fastening, valleys, ridges, penetrations, flashing and installation principles.
Do not ignore siding. Siding contains eight scored questions, the same number as Roofing Substrates.
Study the closed-reference subjects. Most technical study references are not allowed into the C-15 trade exam, so safety, membranes, estimating, siding and roofing-system knowledge need to be learned before exam day.
Roofing Measurements, Estimating and Reference Strategy
Roofing contractors need to work with roof area, slope, quantities, waste, flashing, drainage and material requirements. Exam prep should combine practical estimating skills with fast building-code navigation.
Simplified Nevada C-15 exam prep illustration for roofing systems, siding, flashing, estimating and IBC navigation.
Use a repeatable approach. Identify the roof or exterior-wall system, decide whether the question is technical knowledge or code based, work the calculation if needed and use the IBC to confirm code-specific requirements.
- Roof Area: measurements, squares, slope and material quantities
- Roofing Substrates: decks, sheathing, deterioration, preparation and fastening surfaces
- Steep Roofing: shingles, tile, slate, shakes, underlayment, valleys and ridges
- Low-Slope Systems: elastomeric and built-up bituminous roofing principles
- Siding: weather protection, fastening, joints, soffits and exterior-wall systems
- Flashing and Drainage: edges, penetrations, walls, transitions, curbs and water control
Your Nevada C-15 Roofing and Siding Contractor Roadmap
Move from experience verification to Board approval, PSI testing and final contractor licensing.
1
Confirm the C-15 classification
Make sure the full Roofing and Siding classification matches the work your company plans to contract.
2
Document qualifying experience
The trade qualifier generally needs four years of qualifying experience within the 15 years immediately before the application.
3
Submit the Nevada contractor application
Provide the required experience documentation, business information, fingerprints and other application materials to the Nevada State Contractors Board.
4
Receive examination eligibility
The Board determines eligibility before the required PSI contractor examinations are scheduled.
5
Prepare for the C-15 trade exam
Study roofing, siding, safety, flashing, photovoltaic systems and International Building Code navigation.
6
Prepare for Nevada CMS
The Management Qualified Individual should prepare for Nevada business and law requirements unless the Board approves an applicable waiver.
7
Complete final licensing requirements
After testing, complete any remaining financial responsibility, bond and Board requirements before the license is issued.
Nevada C-15 Roofing and Siding Exam Topic Weighting
These counts follow the current PSI C-classification bulletin. Bar lengths compare each category with the largest 16-question Steep Roofing section.
Safety 5 questions • 8.3%
Roofing Substrates 8 questions • 13.3%
Steep Roofing 16 questions • 26.7%
Roofing Repairs 4 questions • 6.7%
Elastomeric Roofing 7 questions • 11.7%
Built-Up Bituminous Roofing 7 questions • 11.7%
Sheet Metal and Flashing 3 questions • 5%
Siding 8 questions • 13.3%
Photovoltaic Systems 2 questions • 3.3%
Nevada C-15 Roofing and Siding Exam References
Only the current PSI-approved exam-room reference should be treated as an allowed C-15 trade-exam book. The remaining references below are used for technical study.
| Reference | Primary Study Use | Exam-Room Status |
|---|---|---|
| International Building Code, 2018 | Roof coverings, exterior walls, weather protection, structural requirements and building-code navigation | Allowed in the current C-15 trade examination |
| NRCA Roofing Manual: Steep Slope Roof Systems, 2025 | Shingles, tile, slate, wood roofing, underlayments and steep-slope system details | Study only, not allowed in the C-15 examination center |
| NRCA Roofing Manual: Metal Panel and SPF Roof Systems, 2024 | Metal roofing and spray polyurethane foam roofing concepts | Study only |
| NRCA Roofing Manual: Membrane Roofing Systems, 2019 | Membrane and low-slope roofing systems | Study only |
| 29 CFR Part 1926 OSHA | Fall protection, ladders, scaffolds, PPE, tools and construction safety | Study only |
| ASTM D 4756 | Rigid PVC siding and soffit installation | Study only |
| Roofing Construction and Estimating | Roof measurements, estimating, materials and construction fundamentals | Study only |
| Carpentry and Building Construction | Roof framing, sheathing and related construction concepts | Study only |
| NRCA Guidelines for Roof-Mounted Photovoltaic System Installations | Roof penetrations, flashing, drainage and photovoltaic roof coordination | Study only |
| Construction Business and Law Manual for Nevada | Nevada CMS business and law examination | Allowed for the separate CMS exam, not the C-15 trade exam |
How to Prepare for the Open-Book Nevada C-15 Exam
Build these exam-prep habits
- Practice with the International Building Code, 2018
- Learn roof and exterior-wall code locations
- Use only permanent tabs that comply with PSI rules
- Practice two-minute question pacing
- Study safety material before exam day
- Review steep and low-slope roofing systems
- Practice siding and flashing questions
Avoid these exam-prep mistakes
- Bringing study-only roofing manuals into the exam
- Using temporary Post-It-style tabs
- Writing notes inside the approved code book
- Ignoring siding because you primarily work in roofing
- Skipping photovoltaic-system preparation
- Trying to look up every trade-knowledge question
- Spending five minutes searching for one answer
Nevada C-15 Roofing and Siding vs C-15A Roofing
Nevada's full C-15 license is broader than the C-15A Roofing subclassification.
C-15A focuses on the installation, application, alteration and repair of watertight and weatherproof roofing materials. The full C-15 classification can perform the work authorized by the Roofing, Siding, Insulation and Waterproofing subclassifications.
The exams are also different. The current C-15 exam has 60 scored questions and includes siding. The C-15A roofing-only exam has a separate content outline and does not include the same siding section.
Choose C-15 when: your intended contracting scope requires the broader roofing-and-siding classification.
Choose C-15A when: your intended Nevada scope is limited to the roofing subclassification and the Board confirms that classification fits your business.
Nevada C-15 License and Exam Comparison
The full classification, its roofing subclassification and the CMS examination serve different purposes.
| Path | Main Purpose | Important Difference |
|---|---|---|
| C-15 Roofing and Siding | Full Nevada roofing-and-siding specialty classification | Includes roofing, siding, insulation and waterproofing scope |
| C-15A Roofing | Roofing-only Nevada subclassification | Narrower scope than the full C-15 classification |
| C-15 Trade Exam | Tests roofing-and-siding trade competency | 60 questions, 45 correct to pass, 2 hours |
| CMS Business and Law | Tests Nevada contractor management and law knowledge | Separate from the C-15 technical trade examination |
| Trade Qualified Individual | Provides the business's technical qualification | Generally needs four years of qualifying experience within the prior 15 years |
Nevada C-15 Contractor License Requirements
Trade Qualified Individual
Experience Requirement
- Four years of qualifying trade experience
- Experience generally must fall within the previous 15 years
- Journeyman, foreman, supervising employee or contractor experience can qualify
- Approved education may substitute for up to three years
- Experience documentation must support the C-15 classification
C-15 Exam Candidate
Trade Exam Focus
- Steep roofing
- Roofing substrates
- Elastomeric roofing
- Built-up bituminous roofing
- Siding
- Sheet metal and flashing
- Safety and photovoltaic systems
Contractor Business
Licensing Follow-Through
- Management qualifier requirements
- CMS business and law examination
- Financial responsibility
- Background and fingerprint requirements
- Contractor bond requirements
- Final Nevada State Contractors Board approval
Six-Week Nevada C-15 Roofing and Siding Exam Prep Plan
Build roofing knowledge, siding knowledge and IBC navigation in focused study blocks.
Week 1
Exam Setup and IBC Navigation
- Confirm PSI authorization
- Organize IBC 2018
- Review exam rules
- Practice permanent tab locations
- Take a diagnostic practice set
Week 2
Steep Roofing
- Asphalt shingles
- Tile and slate
- Wood shakes and shingles
- Underlayments
- Valleys, ridges and penetrations
Week 3
Substrates and Repairs
- Roof decks
- Sheathing
- Deterioration
- Surface preparation
- Leak and flashing diagnosis
Week 4
Low-Slope Roofing
- Elastomeric systems
- Built-up bituminous roofing
- Membranes
- Insulation
- Drainage and maintenance
Week 5
Siding, Flashing and Safety
- Siding materials
- Fastening and movement
- Sheet metal
- Flashing
- Fall protection and jobsite safety
Week 6
Photovoltaics and Full Simulation
- Roof-mounted PV coordination
- Penetrations and flashing
- 60-question timed practice
- Two-hour pacing
- Final PSI rule check
How Hard Is the Nevada C-15 Roofing and Siding Exam?
The exam is manageable when candidates understand roofing systems and know how to use the IBC quickly. The challenge is the combination of trade knowledge and time.
Sixty questions in two hours gives an average of about two minutes per scored question. Steep Roofing is the largest category, but nearly three-quarters of the exam comes from everything else combined.
That is why experienced roofers should still study siding, low-slope systems, safety, flashing and photovoltaic-system questions. The exam is not impressed by how many roofs you have installed if the question in front of you happens to be about PVC siding.
Nevada C-15 Exam Day Checklist
Do this
- Confirm your PSI C-15 examination authorization
- Bring valid required identification
- Bring the International Building Code, 2018
- Use only permitted permanent tabs
- Arrive early for test-center check-in
- Maintain roughly two-minute question pacing
- Answer every question before final review
Do not do this
- Bring study-only NRCA manuals into the exam room
- Bring OSHA as an exam-room reference
- Use temporary tabs or loose papers
- Write notes in the approved reference
- Confuse C-15 with the C-15A roofing-only exam
- Ignore the siding portion
- Spend too long searching the IBC for one answer
Nevada C-15 Roofing and Siding Contractor Exam Prep Options
C-15 Online Exam Prep Course
Structured Roofing and Siding Prep
- Roofing and siding trade review
- IBC navigation preparation
- Steep and low-slope roofing study
- Safety preparation
- Flashing and substrate review
- Timed contractor exam strategy
C-15 Exam Book Package
Reference-Based Study
- International Building Code study
- Roofing-system references
- Siding preparation
- OSHA study material
- Estimating and construction review
- Photovoltaic roofing guidance
Exam-Room Reference Package
IBC 2018 Preparation
- International Building Code, 2018
- Built for open-book preparation
- Code-navigation support
- Roof-covering requirements
- Exterior-wall requirements
- Weather-protection study
Know the Full Nevada C-15 Scope Before Test Day
Nevada C-15 contractor exam prep is about more than shingles.
• C-15 is the full Roofing and Siding classification
• The classification includes roofing, siding, insulation and waterproofing scope
• The current trade exam has 60 scored questions
• Candidates need 45 correct answers under the current PSI outline
• International Building Code 2018 is the current allowed C-15 trade reference
• Steep Roofing is the largest current category with 16 questions
• Siding and Photovoltaic Systems are both part of the current exam outline
Study the whole classification, not just the roofing work you perform most often.
Nevada C-15 Roofing and Siding Contractor Exam Prep FAQ
Nevada C-15 Licensing
C-15 is Nevada's specialty classification for roofing and siding. A full C-15 license includes work authorized under the C-15 roofing, siding, insulation and waterproofing subclassifications.
The classification includes qualifying roofing, siding, building insulation and waterproofing work within the scope established by Nevada contractor regulations.
C-15 is the broader Roofing and Siding classification. C-15A is the roofing-only subclassification and does not provide the complete siding, insulation and waterproofing scope of the full C-15 classification.
The trade qualified individual generally needs at least four full years of qualifying experience as a journeyman, foreman, supervising employee or contractor in the requested classification within the 15 years immediately before filing the application.
Nevada allows qualifying training from an accredited college, university or equivalent program accepted by the Board to satisfy up to three years of the required experience.
Nevada contractor applicants generally need a Management Qualified Individual who passes the Contractor Management Survey business and law examination unless an applicable waiver is approved.
Nevada C-15 Trade Exam
The Nevada State Contractors Board determines examination eligibility and PSI administers the contractor examinations.
The current PSI C-15 Roofing and Siding Contractor examination contains 60 scored questions.
Candidates have two hours to complete the current Nevada C-15 Roofing and Siding Contractor trade examination.
The current PSI bulletin requires at least 45 correct answers out of 60 scored questions, which is 75 percent.
Yes. PSI lists the Nevada C-15 Roofing and Siding Contractor trade examination as open book.
The current PSI bulletin lists the International Building Code, 2018 edition, as the reference allowed in the C-15 trade examination center.
No. PSI currently lists the NRCA roofing manuals as study references that are not allowed in the C-15 examination center.
Steep Roofing is the largest current category with 16 scored questions.
Yes. Siding is a dedicated examination category with eight scored questions in the current PSI outline.
Yes. The current PSI C-15 content outline includes two questions on photovoltaic systems.
Open-Book Rules and Licensing
PSI allows approved references to be highlighted, underlined and indexed before the examination. Permanent tabs are allowed, but temporary tabs such as Post-It notes are prohibited. Handwritten notes are not allowed.
No. Passing the trade exam is only part of the Nevada licensing process. Applicants must also satisfy Nevada State Contractors Board application, experience, management, financial responsibility, background, bond and other applicable licensing requirements.
Watch: How to Become a Roofing Contractor
Watch this related 1 Exam Prep roofing contractor video for additional guidance about roofing contractor licensing, exam preparation and building a roofing contracting career.
Nevada C-15 exam note: this 1 Exam Prep video provides general roofing contractor guidance. Nevada C-15 candidates should use the current Nevada State Contractors Board requirements and PSI C-classification bulletin for the exam format, passing score, allowed references and licensing rules that control their application.
Nevada C-15 Roofing and Siding Contractor Exam Prep Resources
Use current Nevada State Contractors Board and PSI requirements together with focused roofing and siding study materials from 1 Exam Prep.
Nevada C-15 Online Exam Prep Course Nevada C-15 Roofing and Siding Collection Nevada C-15 Exam Book Package C-15 Books Allowed Into Exam Package Nevada C-15 Ultimate Exam Prep Rental Nevada Contractor License Requirements Nevada Contractor License Application Nevada PSI Contractor Exams Contact 1 Exam Prep
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Nevada C-15 Roofing & Siding Exam Prep
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