CSLB Roofing (C-39): Online Practice Exam

What this exam covers

Practice questions for the California CSLB Roofing (C-39) license exam, delivered online and graded instantly. Per the state's classification, a C-39 contractor applies all types of roofing, waterproofing, and weatherproofing materials to buildings and structures. Works on any device, including iPad. See the official CSLB C39 classification.

Topics tested

1. Introduction to roofing
2. Waterproofing & cold-applied roofing
3. Built-up roofing
4. Asphalt and wood shingles
5. Rigid roofing
6. Single-ply roofing
7. Metal roofing
8. Blueprint reading
9. Tools & equipment
10. Safety
11. Elementary mathematics

Updated July 2026 · 2022 CA Codes · 658 Questions · Topic Practice

• Content Last Updated: July 24, 2026
• Code Basis: 2022 California Codes
• Question Count: 658 practice questions
• Organized By: CSLB study-guide topic categories
• Includes: This practice exam has been updated using Peerless’s vetted usable question set. Questions are organized by CSLB study-guide topic categories and include answer explanations to support full-exam review and focused topic practice. Each topic has a mini-exam to help you develop mastery.

Sample questions — Try our free practice test

1. The first course of roll roofing should be applied so that it overhangs the eaves and rakes by at least 1/4 inch but not more than:
   ✓ A. 3/8 inch · B. 1/2 inch · C. 3/4 inch
2. A No. 1 wood shingle roof with shingles 24" long and a slope of 3 in 12, the maximum exposure recommended is:
   ✓ A. 5-3/4" · B. 6-1/2" · C. 7"
3. Metal ladders should be at least ___ feet from 220 volt electrical wiring.
   A. 2 · ✓ B. 4 · C. 6
4. Corrugated galvanized roofing sheets are produced with 2-1/2 inch corrugations in ____ gauge or heavier sheets.
   A. 26 · B. 28 · ✓ C. 30
5. What is one of the greatest causes of roofing deterioration?
   A. Wind · ✓ B. Ultraviolet rays from the sun · C. Rain · D. Air pollution