Practice roof-pitch and material calculations alongside questions on membrane repairs, shingles and tile. Get instant explanations for the estimating and installation decisions.
A roof structure has a total rise of 7' 6" and a run of 15'. What is the slope (pitch) of this roof expressed as a ratio over 12?
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Answer 20 original practice questions on roof pitch, material quantities, attic ventilation and deck deflection. Work through low-slope membrane repairs, steep-slope fastening and tile installation, plus roofing safety. Your result breaks the sample down by published CSLB topic area to help you find the systems or calculations that need more practice.
The C-39 Roofing Contractor exam draws from these published CSLB topic areas. The percentages show approximate exam weights; your sample result groups answers by the same areas.
Topic names and weights follow CSLB C-39 Roofing Contractor study guides; your practice here uses original Test2Pro questions grouped by those areas.
Knowing how much material to order is different from knowing how to repair a membrane or install tile. This roofing sample checks both estimating and decisions tied to particular roof systems. It groups questions by CSLB topic areas, with low-slope and steep-slope work kept distinct in your feedback. Use the result to choose what to review; it does not predict whether you will pass. Full prep adds the complete question bank, saved history and readiness tracking.
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CSLB publishes a free Roofing (C-39) study-guide PDF with the topic outline, reference list and three sample questions. Follow the study-guide link on this page to get it. Our 20-question sample runs online with instant explanations; Test2Pro does not provide a downloadable PDF version of this test.
The guide lists four NRCA Roofing Manuals (steep-slope systems, membrane systems, metal panel and SPF systems, and architectural metal flashing), the Concrete and Clay Tile Installation Manual, the 2022 California Building, Residential and Energy Codes, and the Cal/OSHA safety orders. The exam is closed-book, so use these materials for study, not during testing.
The guide covers estimating, job preparation, low-slope work, steep-slope work and safety. Steep-Slope Roof Projects is the largest area of the outline. You have 3-1/2 hours for the closed-book exam, with four choices and one best answer per question. There is no penalty for guessing. If you mainly work on one roof system, use the outline to find other systems to review.
Yes. C-39 is on CSLB's list of exams offered in Spanish, and so is Law & Business. You can also prepare in Spanish: the Test2Pro site works in English, Spanish, Chinese, and Russian, and practice questions can be shown in 8 languages.
This sample includes roof pitch from rise and run, material quantities in roofing squares and pallets, and a deck-deflection calculation. CSLB's guide also gives a roofing-area example and says a calculator is provided for computation questions. Review unit conversions and quantity rounding as you work through the explanations.
Yes. Low-slope questions include TPO patch preparation, thermoplastic membrane welding and built-up roof repairs. Steep-slope questions cover copper-panel fastening, asphalt-shingle repair, wood-shingle slopes and tile installation. The sample gives you selected decisions from both groups, with explanations to help identify which roof systems need more review.
Look for missed questions in estimating, roof-system installation and repair, or safety. Within installation and repair, note the roof system involved so you can review the unfamiliar method.
Topic names and weights follow CSLB study guides; practice questions are original Test2Pro content.
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