California Roofing (C-39) Contractor Licensing Exam Prep Book Reference Package

California Roofing (C-39) Contractor Licensing Exam Prep Book Reference Package

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California Roofing (C-39) Contractor Licensing Exam Prep Book Reference Package

Prepare for the California Roofing (C-39) contractor licensing examination with a focused book reference package covering roof planning, estimating, job-site preparation, low-slope roofing, steep-slope roofing, flashing, ventilation, reroofing, waterproofing, energy requirements, and construction safety. This package brings together technical references that can help candidates strengthen their roofing knowledge and organize their preparation before taking the California C-39 trade examination.

The California C-39 Roofing classification covers contractors who install products and repair surfaces that seal, waterproof, and weatherproof structures. The work is intended to prevent water and related materials from penetrating protected surfaces and reaching the space or materials beyond. The classification includes examination and preparation of roofing surfaces and the use of roofing and waterproofing materials such as asphalt products, felt, glass fabric, urethane foam, metal roofing systems, shakes, shingles, roof tile, slate, membranes, and related weatherproofing materials.

Because roofing work includes many different systems, C-39 exam preparation requires more than familiarity with one type of roof covering. Candidates should understand project planning, estimating, tear-off procedures, substrate conditions, underlayment, flashing, ventilation, drainage, low-slope membranes, steep-slope roofing, metal roofing, spray polyurethane foam systems, tile, shingles, reroofing, repairs, fall protection, and other job-site safety practices.

The California Roofing (C-39) trade examination is a closed-book examination. The books in this package are intended for preparation before test day and cannot be used during the trade examination. Candidates should use the references to understand roofing systems, technical terminology, installation practices, construction requirements, and safety concepts, then practice recalling and applying that information without depending on the books.

This package can be useful for experienced roofers as well as candidates expanding their knowledge across the complete C-39 classification. A roofer who primarily works with asphalt shingles may need more preparation involving low-slope membrane systems, metal panels, spray polyurethane foam, or tile. A commercial roofer may benefit from additional review of steep-slope systems, residential requirements, or reroofing. Structured reference study helps create more balanced preparation across the examination content.

What You Get

  • 2022 California Building Code — a California building-code reference supporting study of roofing assemblies, materials, construction requirements, weather protection, and related building provisions.
  • 2022 California Energy Code, Title 24, Part 6 — a reference supporting study of California energy requirements that can affect roofing assemblies and roof-related construction.
  • 2022 California Residential Code — a residential construction reference covering roof assemblies, materials, underlayment, flashing, reroofing, and related residential requirements.
  • Concrete and Clay Tile Installation Manual, 2015 — a technical reference focused on concrete and clay roof tile systems, layout, underlayment, flashing, fastening, and installation practices.
  • NRCA Roofing Manual: Architectural Metal Flashing Condensation and Air Leakage Control, and Reroofing — a roofing reference supporting study of flashing, moisture control, air leakage, and reroofing practices.
  • NRCA Roofing Manual: Steep Slope Roof Systems — a technical reference covering steep-slope roofing materials, assemblies, installation, repair, and related practices.
  • NRCA Roofing Manual: Metal Panel and SPF Roof Systems — a reference focused on metal panel roofing and spray polyurethane foam roofing systems.
  • NRCA Roofing Manual: Membrane Roofing Systems — a reference supporting study of membrane roof assemblies, low-slope systems, application methods, flashing, and repairs.
  • Cal/OSHA General Industry & Electrical Safety Orders — a California workplace safety reference addressing occupational and electrical safety requirements.
  • Cal/OSHA Construction & Electrical Safety Orders — a construction safety reference supporting review of fall protection, job-site hazards, electrical safety, equipment, access, and worker protection.

Exam Details

The California Contractors State License Board divides the Roofing (C-39) trade examination into five major content areas. The percentages are approximate and provide a useful framework for organizing preparation.

  • Planning and Estimating — 22%
    This section covers planning roof projects and estimating roofing work. Candidates should understand project scope, roof measurements, quantities, materials, labor, equipment, scheduling, and other considerations involved before installation begins.
  • Job Site Preparation for Roof Projects — 13%
    Topics include protecting surrounding property, correcting existing problems, and tearing off existing roofing materials.
  • Low-Slope Roof Projects — 17%
    This area includes installing flashing, ventilation, and underlayment, installing various low-slope roofing systems, and repairing low-slope roof systems.
  • Steep-Slope Roof Projects — 26%
    The largest examination section covers flashing, ventilation, underlayment, installation of various steep-slope roofing systems, and steep-slope roof repairs.
  • Safety — 22%
    Safety topics include personnel safety, job-site safety, and fall protection.

The C-39 examination uses a multiple-choice format with four choices for each question and one best answer. Some questions require mathematical computation, and a calculator is provided during the examination.

There is no penalty for guessing. Candidates should read every question carefully and evaluate all choices before selecting the best response. Roofing questions may involve measurements, material quantities, system selection, installation sequence, repairs, flashing, ventilation, tear-off procedures, or safety situations.

Closed Book Test

The California Roofing (C-39) trade examination is a closed-book examination. Reference materials cannot be used during the test.

The books in this package should therefore be used to build technical understanding before exam day. Candidates should become familiar with roofing terminology, installation procedures, system components, flashing methods, underlayment, ventilation, repair practices, and safety without relying on the ability to search a book during the examination.

A useful closed-book preparation method is to study a roofing system and then explain the installation sequence from memory. For example, after reviewing a steep-slope assembly, describe roof-deck preparation, underlayment, flashing, ventilation, roof-covering installation, penetrations, transitions, and final inspection without consulting the reference.

The same approach can be used for low-slope systems. Review the roof deck, insulation, vapor or air-control considerations where applicable, membranes, flashings, penetrations, drainage, terminations, and repair procedures. Understanding how the components function together can make technical questions easier to approach.

Licensing Steps

The California Contractors State License Board administers contractor licensing and the C-39 Roofing classification. Applicants generally proceed through qualification, application, examination, and license-issuance requirements.

  1. Meet the qualifying experience requirement. The qualifying individual generally must have at least four years of qualifying experience in the classification during the 10 years immediately before applying.
  2. Submit the appropriate CSLB application. Applicants who are required to take examinations complete the applicable contractor license examination application and provide the required qualifying experience information.
  3. Complete fingerprint requirements. Applicants subject to fingerprinting must complete the required background-check process according to CSLB instructions.
  4. Complete the required examinations. Unless an applicable examination waiver applies, the qualifying individual generally must pass the C-39 Roofing trade examination and the California Law and Business examination.
  5. Complete the examination process. Passing the examinations is an important licensing step but does not by itself create an active contractor license.
  6. Complete license-issuance requirements. Applicants must satisfy applicable bonding, workers' compensation, documentation, asbestos examination, and other CSLB requirements before an active license can be issued.

The precise licensing process can vary depending on the applicant's business structure, previous California licensing history, qualifying individual, and examination waiver eligibility.

State Requirements

The qualifying individual generally needs at least four years of experience in the C-39 classification during the 10 years immediately before applying. The experience must be at journey level or in another qualifying role recognized by CSLB, such as foreman, supervising employee, or contractor.

Qualifying education, apprenticeship training, or technical instruction may receive credit toward part of the experience requirement under CSLB rules. Practical trade experience remains a required part of qualifying for licensure.

Applicants required to take examinations generally must pass both the C-39 Roofing trade examination and the California Law and Business examination unless an applicable examination waiver is available.

An active contractor license requires a contractor bond. The contractor bond amount is $25,000. Depending on how the license is qualified and the business entity involved, additional bond requirements may apply.

The C-39 classification has an important workers' compensation requirement. Contractors holding a C-39 Roofing classification are required to maintain workers' compensation insurance or qualifying self-insurance for an active license. The standard no-employee workers' compensation exemption available to many other contractor classifications does not apply to C-39 roofing contractors.

New contractor license applicants must also complete CSLB's asbestos open-book examination as part of applicable license-issuance requirements. This asbestos requirement is separate from the C-39 Roofing examination. The C-39 trade test itself is closed book.

Reference Books

The following references form the foundation of this California C-39 Roofing contractor exam prep package. They support study of California construction requirements, energy considerations, steep- and low-slope roof systems, tile, metal roofing, spray polyurethane foam, membrane systems, reroofing, flashing, and safety.

  • 2022 California Building Code
    A California construction-code reference supporting review of roof assemblies, materials, weather protection, flashing, structural interfaces, reroofing concepts, and other building requirements affecting roofing work.
  • 2022 California Energy Code, Title 24, Part 6
    A reference for studying energy-efficiency requirements that can influence roof assemblies, insulation, thermal performance, and related construction decisions.
  • 2022 California Residential Code
    A residential construction reference supporting study of roof coverings, roof assemblies, underlayment, flashing, reroofing, ventilation, and other requirements affecting residential roofing projects.
  • Concrete and Clay Tile Installation Manual, 2015
    A specialized reference for studying concrete and clay tile roofing, including layout, underlayment, flashing, fastening, roof penetrations, installation practices, and system details.
  • NRCA Roofing Manual: Architectural Metal Flashing Condensation and Air Leakage Control, and Reroofing
    A roofing-industry reference covering architectural metal flashing, moisture and condensation considerations, air leakage control, and reroofing practices.
  • NRCA Roofing Manual: Steep Slope Roof Systems
    A technical resource supporting study of steep-slope roof assemblies, materials, underlayments, flashings, installation practices, drainage, and repairs.
  • NRCA Roofing Manual: Metal Panel and SPF Roof Systems
    A reference for reviewing metal panel roof systems and spray polyurethane foam roofing, including materials, installation practices, flashing, detailing, and repair concepts.
  • NRCA Roofing Manual: Membrane Roofing Systems
    A reference supporting preparation for low-slope and membrane roofing systems, including assemblies, flashing, penetrations, application methods, drainage, and repair practices.
  • Cal/OSHA General Industry & Electrical Safety Orders
    A California workplace safety reference supporting review of employee protection, electrical hazards, tools, equipment, and general occupational safety requirements.
  • Cal/OSHA Construction & Electrical Safety Orders
    A construction safety reference particularly useful for studying fall hazards, roof access, ladders, scaffolds, electrical safety, equipment, personal protective equipment, and job-site protection.

Test Information and Study Materials

For Planning and Estimating, study roof measurements, slopes, areas, quantities, material requirements, labor, equipment, staging, and project sequencing. Roofing calculations can involve squares, linear measurements, waste, flashing lengths, membrane areas, and other practical quantities.

Candidates should be comfortable evaluating the condition of an existing roof before deciding how work should proceed. Roof-deck conditions, drainage, penetrations, existing materials, structural conditions, moisture, and surrounding property can all influence project planning.

For Job Site Preparation, review protection of landscaping, walls, windows, vehicles, sidewalks, and occupied areas. Tear-off work can create falling debris, exposed roof decks, dust, and weather exposure, making planning and protection essential.

Existing roofing conditions may need correction before new materials are installed. Study how damaged decking, deteriorated materials, moisture conditions, drainage problems, and improper existing details can affect the new roofing system.

For Low-Slope Roof Projects, review membrane systems, insulation, underlayment where applicable, flashings, penetrations, drains, edges, terminations, ventilation considerations, repairs, and reroofing. The NRCA membrane roofing material can help candidates compare different low-slope systems and understand how assemblies function.

Metal panel and spray polyurethane foam systems should also be included in preparation. Study how these roof types differ from conventional membrane systems and how substrate conditions, flashing, penetrations, seams, coatings, and repairs affect performance.

For Steep-Slope Roof Projects, study asphalt shingles, tile, metal roofing, shakes, and other steep-slope materials covered by the trade. Review underlayment, flashing, valleys, hips, ridges, penetrations, ventilation, fastening, transitions, and repair methods.

Concrete and clay tile systems deserve focused attention because tile roofing involves specialized layout, fastening, flashing, underlayment, and detailing. Use the tile installation reference to build familiarity with how tile systems are assembled and how water is managed beneath and around roof components.

Flashing is important across both steep- and low-slope systems. Review wall transitions, roof edges, penetrations, valleys, curbs, chimneys, parapets, and other areas where different construction surfaces meet. Many roof failures occur at transitions rather than in the center of the roof field.

Ventilation and moisture control should also be part of preparation. The performance of a roof assembly can be influenced by airflow, condensation, insulation, interior conditions, and the way the complete building enclosure is constructed.

Reroofing requires candidates to evaluate existing conditions rather than automatically installing new material over old roofing. Review tear-off considerations, deck inspection, compatibility, flashing, existing damage, drainage, and how the new system interfaces with remaining building components.

For Safety, give substantial attention to fall protection because roofing work routinely exposes workers to elevated surfaces and roof edges. Review ladders, access, scaffolding, personal fall-protection systems, roof openings, material handling, electrical hazards, housekeeping, tools, and protection of people below the work area.

Safety represents approximately 22% of the current C-39 examination outline, making it one of the largest content areas. Study safe work practices as carefully as installation methods. A roofing contractor must understand how to protect workers during both routine installations and unusual job-site conditions.

Use the building, residential, and energy codes to understand how roof systems fit into broader California construction requirements. Use the NRCA manuals and tile installation material to strengthen trade-specific knowledge, then use the Cal/OSHA references to reinforce safety.

Because the C-39 examination is closed book, include active recall in every study session. Review a roofing system, close the reference, and explain the installation sequence. Sketch flashing details from memory, calculate roof quantities, or describe how you would inspect and repair a particular condition.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps California C-39 candidates organize their preparation around the major subjects associated with the Roofing contractor examination. A focused book reference package gives candidates technical resources for reviewing steep-slope roofing, low-slope roofing, tile, membranes, metal systems, spray polyurethane foam, flashing, reroofing, energy requirements, and safety.

Trade-focused review helps candidates understand roofing systems as complete assemblies. Instead of memorizing individual materials, candidates can study how roof decks, insulation, underlayment, membranes, roof coverings, flashings, penetrations, ventilation, drainage, and terminations work together to protect a structure.

Reference navigation is valuable during preparation even though the C-39 trade examination is closed book. Candidates can use the appropriate manual to strengthen unfamiliar subjects and then practice recalling the information without the reference.

1 Exam Prep also supports practice-oriented preparation. Roofing examination questions may require candidates to calculate an area, identify an installation sequence, recognize the cause of a roofing problem, choose an appropriate repair, evaluate an existing roof, or determine the safest response to a job-site condition.

The reference package can help identify gaps in field experience. A residential shingle roofer may need more study of low-slope membranes or SPF systems. A commercial membrane installer may need additional review of tile or other steep-slope work. Experienced roofers may still benefit from focused study of estimating, energy requirements, reroofing, or Cal/OSHA fall protection.

The goal is to support consistent preparation through organized technical study, roofing-focused reference materials, active recall, calculations, and safety review. No study package can guarantee a passing score or licensing approval, but disciplined preparation can help candidates make more effective use of their study time before the California C-39 examination.

FAQ Section

What does the California C-39 Roofing classification cover?

The C-39 classification covers the installation and repair of roofing, waterproofing, weatherproofing, and membrane systems used to prevent water and related materials from penetrating protected structures.

Is the California C-39 trade examination open book?

No. The California Roofing (C-39) trade examination is closed book. Reference materials cannot be used during the trade test.

What subjects are covered on the C-39 exam?

The examination covers Planning and Estimating, Job Site Preparation for Roof Projects, Low-Slope Roof Projects, Steep-Slope Roof Projects, and Safety.

What is the largest section of the C-39 examination?

Steep-Slope Roof Projects represent approximately 26% of the examination. This area includes flashings, ventilation, underlayment, installation of steep-slope roofing systems, and repairs.

Does the C-39 exam cover low-slope roofing?

Yes. Low-Slope Roof Projects represent approximately 17% of the examination and include flashing, ventilation, underlayment, various low-slope systems, and repair work.

Can I use the roofing manuals during the examination?

No. The C-39 trade examination is closed book. The roofing manuals, code books, and safety references are intended for preparation before test day.

Does the C-39 exam include fall protection?

Yes. Fall protection is specifically included in the Safety portion of the examination, along with personnel safety and general job-site safety.

How much qualifying experience is generally required?

The qualifying individual generally needs at least four years of qualifying experience in the C-39 classification during the 10 years immediately before applying. The experience must satisfy CSLB requirements for qualifying trade or supervisory work.

Is workers' compensation insurance required for a C-39 roofing contractor?

Yes. An active C-39 Roofing license requires workers' compensation insurance or qualifying self-insurance. The standard no-employee workers' compensation exemption available to many other classifications does not apply to C-39 roofing contractors.

Do C-39 applicants also take the California Law and Business examination?

Applicants who are required to take examinations generally must pass both the C-39 Roofing trade examination and the California Law and Business examination unless an applicable examination waiver applies.

How should I use the C-39 reference package?

Organize your study around the five major examination sections. Use the applicable code or roofing manual for deeper review, then practice recalling installation procedures, repair methods, calculations, flashing concepts, and safety requirements without using the books.