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CA C-39 — Roofing Contractor Exam

C-39 License

CA · CSLB Exam

Updated 2025
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What's covered - 5 topics per exam

115 questions and answers per exam set - Exactly like your real CSLB contractor exam.

  • Planning and Estimating
    22%
  • Job Site Preparation for Roof Projects
    13%
  • Low-Slope Roof Projects
    17%
  • Steep-Slope Roof Projects
    26%
  • Safety
    22%

See how you learn

Planning and Estimating

Question 1
To calculate the linear footage of a hip or valley on a roof with a 4:12 slope, the contractor is required to multiply the horizontal run by which specific factor?
Active Guidance

The hip/valley multiplier for a 4:12 slope is 1.453. This factor accounts for the diagonal length of the hip or valley relative to the horizontal run of the common rafters. 1.054 is the multiplier for common rafters at 4:12.

Common Questions

Is this updated for 2025?

Yes. All questions, code references, and study materials were last given a major update for the 2025 CSLB standards.

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