Prepare for the California Roofing (C-39) contractor licensing examinations with Business and Trade online courses focused on the technical roofing subjects and contractor business responsibilities tested by the California Contractors State License Board. This package supports preparation for both the C-39 Roofing trade examination and the California Law and Business examination, helping candidates organize their study around planning, estimating, job-site preparation, tear-off, roof-system installation, flashing, underlayment, ventilation, low-slope roofing, steep-slope roofing, repair, waterproofing, weatherproofing, fall protection, contractor licensing, finances, employment, contracts, insurance, liens, public works, and business responsibilities.
The California C-39 classification covers contractors who install products and repair surfaces that seal, waterproof, and weatherproof structures. The purpose of this work is to prevent water and related materials from penetrating the roofing or weatherproofing system and reaching the protected building materials or spaces below.
C-39 roofing work can involve asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, flax, shakes, shingles, roof tile, slate, membranes, waterproofing products, weatherproofing materials, and combinations of roofing products. Contractors also examine and prepare roof surfaces as part of completing this work.
Roofing requires more than knowing how to install a particular roof covering. Successful projects depend on understanding roof geometry, drainage, substrate conditions, deck preparation, tear-off procedures, underlayment, flashing, ventilation, penetrations, fastening, weather exposure, material compatibility, repair methods, and job-site safety. Candidates should prepare to apply these concepts to both low-slope and steep-slope roof systems.
Safety is especially important in roofing because contractors routinely work at elevation and near roof edges, openings, ladders, scaffolds, electrical hazards, hot materials, tools, and changing weather conditions. Fall protection is specifically identified as an examination subject and should receive significant attention during preparation.
The separate California Law and Business examination addresses the responsibilities involved in operating a licensed contracting business. Candidates should prepare for contractor licensing, business organization, finances, employment requirements, insurance, liens, contracts, public works, and safety in addition to the C-39 technical material.
This package includes Law and Business exam preparation together with the Roofing trade course. Both examinations are closed book, so candidates should prepare to recall and apply roofing, estimating, installation, repair, safety, and contractor business concepts without relying on reference materials during the tests.
The current California Roofing (C-39) examination outline applies to examinations scheduled on or after January 1, 2023. The trade examination is divided into five major content areas.
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, so candidates should attempt every question. Steep-Slope Roof Projects is the largest section at approximately 26%. Planning and Estimating and Safety each represent approximately 22%, Low-Slope Roof Projects approximately 17%, and Job Site Preparation approximately 13%.
The examination distribution shows that preparation should cover the full roofing process. Candidates should be ready for questions involving quantities, roof layout, tear-off, substrate conditions, flashings, ventilation, underlayment, roofing materials, repair procedures, fall protection, and safe job-site practices.
The California Roofing (C-39) trade examination is a closed-book examination. Reference books, code books, roofing manuals, notes, and other study materials cannot be used during the test.
The California Law and Business examination is also a closed-book examination. Candidates should prepare to answer contractor licensing, financial, employment, insurance, lien, contract, public works, and safety questions without using reference materials during the examination.
Closed-book roofing preparation should focus on understanding roof-system principles rather than depending on reference lookup. Candidates should be able to evaluate roof conditions, identify materials, calculate quantities, recognize correct installation procedures, understand flashing and ventilation, diagnose common roof failures, and apply safe work practices from memory.
A useful study method is to take a roofing project from beginning to end without consulting a book. Start with the site inspection and measurements, determine materials and labor, plan access and property protection, complete tear-off where required, inspect and prepare the deck, install underlayment and flashing, install the selected roof system, complete penetrations and edges, inspect the work, and clean the site.
The California Contractors State License Board administers contractor licensing and the examinations associated with the C-39 Roofing classification.
A California C-39 Roofing contractor installs products and repairs surfaces that seal, waterproof, and weatherproof structures. The work is performed to prevent water or related materials from penetrating the roofing system and gaining access to the protected materials or spaces beyond.
The classification includes examination and preparation of roofing surfaces and the use of asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, flax, shakes, shingles, roof tile, slate, waterproofing systems, weatherproofing products, membrane materials, and combinations of those products.
Roofing projects must coordinate with applicable building requirements governing materials, roof assemblies, reroofing, flashing, underlayment, drainage, ventilation, fire classification, structural conditions, and roof coverings. Residential roofing also requires familiarity with applicable residential construction requirements.
Energy-efficiency requirements can affect roofing work through roof assemblies, insulation interfaces, reflective roofing products, and other energy-related provisions. Candidates should understand how roofing can interact with California energy requirements.
Roofing contractors also need to recognize when an existing roof or deck has problems that must be corrected before a new roof system is installed. Damaged decking, inadequate drainage, deteriorated flashing, moisture problems, structural defects, or incompatible materials can affect the performance of the completed system.
Licensed contractors must also understand California business responsibilities addressed by the Law and Business examination, including licensing, finances, employment, insurance, liens, contracts, public works, and safety.
For Planning and Estimating, candidates should practice evaluating roof geometry, slopes, penetrations, edges, valleys, drainage, existing roof conditions, material requirements, access, equipment, labor, and project specifications.
Roof estimating can involve calculating roof areas, squares, slopes, waste, underlayment, flashing, membrane, shingles, tile, metal panels, insulation, fasteners, adhesives, accessories, labor, tear-off quantities, disposal, and equipment requirements.
Candidates should understand how roof shape affects quantities. Hips, valleys, ridges, dormers, penetrations, parapets, curbs, and irregular roof sections can increase material and labor requirements compared with a simple rectangular roof.
For Job Site Preparation for Roof Projects, study property protection, existing roof evaluation, correction of problems, tear-off procedures, material staging, debris handling, and substrate preparation.
Surrounding property should be protected from falling debris, dust, tools, roofing materials, and tear-off operations. Landscaping, windows, vehicles, walls, walkways, equipment, and occupied areas may require protection.
When an existing roof is removed, the contractor should evaluate the underlying deck and related components. Damaged or deteriorated materials should be addressed before installing the new roofing system.
Tear-off should be organized to maintain worker safety and protect the structure from weather exposure. Contractors should also consider debris movement, disposal, access, and the loading imposed by stored materials.
For Low-Slope Roof Projects, candidates should study underlayment or substrate preparation, insulation, membranes, flashing, drainage, penetrations, ventilation where applicable, fastening or attachment methods, and repair.
Low-slope roof performance depends heavily on drainage and detailing. Water that remains on a roof or reaches poorly sealed penetrations and transitions can contribute to leaks and premature deterioration.
Membrane systems can require different installation methods depending on the material. Candidates should understand general principles involving substrate preparation, seams, attachment, flashing, penetrations, edge conditions, and repairs.
Metal panel and spray polyurethane foam systems should also be part of low-slope preparation where applicable. Candidates should understand the importance of compatible details, weatherproof transitions, and system-specific repair procedures.
For Steep-Slope Roof Projects, study asphalt shingles, tile, slate, wood roofing, metal roofing, underlayment, valleys, hips, ridges, flashing, ventilation, penetrations, fastening, layout, and repair.
Underlayment serves as an important layer beneath many steep-slope roof coverings. Candidates should understand its role in weather protection and how improper installation can create vulnerabilities.
Flashing is a major roofing subject because many roof leaks occur at intersections and penetrations rather than through the field of the roof covering. Candidates should study valleys, walls, chimneys, roof-to-wall conditions, vents, skylights, curbs, edges, and other transitions.
Roof ventilation can affect moisture and heat conditions within roof and attic assemblies. Candidates should understand basic intake and exhaust ventilation concepts and how ventilation components coordinate with the roof covering.
Tile preparation should include layout, underlayment, fastening, cutting, hips, ridges, valleys, penetrations, and flashing. Different tile configurations can require specific detailing to maintain weather protection.
Asphalt-shingle preparation should include starter courses, field installation, staggering, fastening, valleys, ridges, penetrations, flashing, and repair methods.
Metal roofing preparation should include panel layout, fastening, seams, expansion and contraction considerations, flashing, penetrations, edges, and compatible materials.
Roof repairs require identifying the actual source of the problem before replacing visible damaged material. Water can travel beneath roof coverings, so the location of interior leakage may not directly identify the exterior failure point.
For Safety, candidates should dedicate significant preparation time because Safety represents approximately 22% of the examination and specifically includes fall protection.
Roofing exposes workers to roof edges, openings, ladders, scaffolds, steep slopes, fragile surfaces, electrical lines, hot materials, power tools, weather, and falling-object hazards. Candidates should understand how hazards change as work progresses across the roof.
Fall protection should be planned before workers are exposed to fall hazards. Preparation should include applicable protective systems, anchors, safe access, equipment inspection, worker positioning, and maintaining protection while materials are moved or installed.
Ladder safety is another essential topic. Ladders should be selected, positioned, secured, and used appropriately for roof access. Damaged or incorrectly placed ladders can create hazards before workers even reach the roof.
Material handling is important because roofing products can be heavy, bulky, sharp, hot, or difficult to control in wind. Candidates should understand safe lifting, staging, hoisting, storage, and movement of materials on roofs.
Electrical hazards can arise from overhead conductors, powered tools, extension cords, and rooftop equipment. Safe planning should account for electrical exposure before tear-off or installation begins.
Weather is also a roofing safety concern. Wind, rain, heat, cold, and changing surface conditions can affect traction, material handling, coating performance, and worker exposure.
The Law and Business examination requires dedicated preparation beyond C-39 trade knowledge. Candidates should study contractor licensing, business organization, finances, employment requirements, insurance, liens, contracts, public works, and safety.
Because both examinations are closed book, candidates should regularly practice roof-area calculations, estimating, tear-off scenarios, material identification, flashing details, low-slope and steep-slope installation questions, repair situations, fall-protection topics, and Law and Business material without relying on references.
1 Exam Prep helps candidates prepare for the California Roofing (C-39) contractor licensing examinations through organized Business and Trade online courses, roofing-focused review, practice-oriented preparation, reference navigation, and structured study guidance.
The Trade course helps candidates work systematically through planning, estimating, tear-off, deck preparation, underlayment, flashing, ventilation, low-slope roofing, steep-slope roofing, shingles, tile, membranes, metal systems, repairs, calculations, and fall protection.
Law and Business exam preparation supports study of contractor licensing, business organization, finances, employment, insurance, liens, contracts, public works, payments, and safety. These subjects help candidates prepare for the responsibilities associated with operating a licensed California contracting business.
Reference navigation helps candidates work with the California Building, Energy, and Residential Codes, tile-roof installation guidance, NRCA roofing manuals, and Cal/OSHA safety materials more effectively during preparation.
Practice-oriented study can help identify gaps in experience. A steep-slope roofer may need additional review of membrane systems or spray polyurethane foam roofing. A commercial low-slope roofer may need more preparation involving tile, shingles, residential ventilation, or Law and Business subjects.
No exam preparation course can guarantee a passing examination result or license approval. Organized Business and Trade study, repeated calculations, roof-system review, reference navigation, and closed-book practice can help candidates build stronger familiarity with the subjects tested on the California C-39 and Law and Business examinations.
The package includes a C-39 Roofing Trade Online Course and Law and Business exam preparation covering the major technical, safety, and contractor business subjects associated with California licensing.
Yes. Law and Business exam preparation is included and covers contractor licensing, finances, employment, insurance, liens, contracts, public works, and safety.
No. The California C-39 Roofing examination is closed book. Reference materials cannot be used during the test.
No. The California Law and Business examination is also closed book.
The examination covers Planning and Estimating, Job Site Preparation for Roof Projects, Low-Slope Roof Projects, Steep-Slope Roof Projects, and Safety.
Steep-Slope Roof Projects is the largest section at approximately 26% of the examination.
Yes. Low-Slope Roof Projects represents approximately 17% of the examination and includes flashing, ventilation, underlayment, roof-system installation, and repair.
Yes. Steep-Slope Roof Projects represents approximately 26% of the examination and includes installation and repair of steep-slope roof systems.
Yes. Tearing off existing roofing is specifically included in Job Site Preparation for Roof Projects.
Yes. Fall protection is specifically included in the Safety section of the examination.
The classification includes materials such as asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, flax, shakes, shingles, roof tile, slate, membrane systems, waterproofing products, weatherproofing materials, and combinations of roofing materials.
A C-39 contractor installs roofing and weatherproofing products and repairs surfaces that seal, waterproof, and weatherproof structures to prevent water and related materials from penetrating the protected building materials or spaces.
No. The C-39 examination is closed book. The listed references are intended for study and preparation before test day.
Divide study time between C-39 trade subjects and Law and Business topics. Use the Trade course for estimating, roof preparation, tear-off, flashing, ventilation, underlayment, low-slope systems, steep-slope systems, repairs, fall protection, and safety, and use the Business portion for licensing, finances, employment, insurance, contracts, public works, and contractor responsibilities. Because both examinations are closed book, regularly practice recalling and applying the material without references.
Find answers to common questions about our exam prep courses.
No questions match your search. Try a different keyword or category.