CALIFORNIA ROOFING CONTRACTOR (C-39) EXAM NEWEST 2026
UPDATE FAST REVIWED FROM ACTUAL TEST 100 QUESTIONS AND
100% VERIFIED ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
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1. What is the primary purpose of underlayment in a roofing system?
A. Improve aesthetics
B. Provide structural support
C. Act as a secondary water barrier
D. Increase insulation
Correct Answer: C
Underlayment serves as a backup layer to prevent water intrusion if the
outer roofing material fails.
2. Which roofing material is most commonly used on low-slope roofs?
A. Asphalt shingles
B. Clay tiles
C. Built-up roofing (BUR)
D. Wood shakes
Correct Answer: C
BUR systems are designed for low-slope applications due to their continuous
waterproof layers.
3. What is the minimum slope typically required for asphalt shingles?
A. 1:12
B. 2:12
C. 4:12
D. 6:12
Correct Answer: B
Most codes require at least a 2:12 slope for asphalt shingles with special
underlayment.
4. Flashing is primarily used to:
A. Secure shingles
, B. Prevent water penetration at joints
C. Improve ventilation
D. Add insulation
Correct Answer: B
Flashing seals roof intersections and penetrations to prevent leaks.
5. What is the function of a drip edge?
A. Support gutters
B. Direct water away from fascia
C. Vent attic air
D. Secure underlayment
Correct Answer: B
Drip edges guide water into gutters and protect fascia from moisture
damage.
6. Which tool is commonly used to cut asphalt shingles?
A. Tin snips
B. Utility knife
C. Circular saw
D. Hacksaw
Correct Answer: B
A utility knife provides clean and precise cuts for shingles.
7. What type of roof ventilation uses natural airflow through intake and
exhaust vents?
A. Mechanical ventilation
B. Passive ventilation
C. Forced ventilation
D. Closed ventilation
Correct Answer: B
Passive systems rely on temperature differences and airflow without
mechanical assistance.
8. Which material is most resistant to fire?
A. Wood shakes
, B. Asphalt shingles
C. Metal roofing
D. Rubber roofing
Correct Answer: C
Metal roofing has high fire resistance compared to combustible materials.
9. What is “roof pitch”?
A. Roof color
B. Roof material thickness
C. Roof slope
D. Roof weight
Correct Answer: C
Pitch refers to the steepness or slope of a roof.
10.Ice dams are primarily caused by:
A. Excess wind
B. Poor insulation and ventilation
C. Heavy shingles
D. Improper flashing
Correct Answer: B
Heat loss causes snow to melt and refreeze at eaves, forming ice dams.
11.What is the main purpose of a ridge vent?
A. Add structural strength
B. Allow hot air to escape
C. Prevent leaks
D. Support shingles
Correct Answer: B
Ridge vents allow warm air to exit the attic, improving ventilation.
12.Which roofing material is heaviest?
A. Asphalt shingles
B. Metal panels
C. Clay tiles
D. Wood shingles
UPDATE FAST REVIWED FROM ACTUAL TEST 100 QUESTIONS AND
100% VERIFIED ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
1. What is the primary purpose of underlayment in a roofing system?
A. Improve aesthetics
B. Provide structural support
C. Act as a secondary water barrier
D. Increase insulation
Correct Answer: C
Underlayment serves as a backup layer to prevent water intrusion if the
outer roofing material fails.
2. Which roofing material is most commonly used on low-slope roofs?
A. Asphalt shingles
B. Clay tiles
C. Built-up roofing (BUR)
D. Wood shakes
Correct Answer: C
BUR systems are designed for low-slope applications due to their continuous
waterproof layers.
3. What is the minimum slope typically required for asphalt shingles?
A. 1:12
B. 2:12
C. 4:12
D. 6:12
Correct Answer: B
Most codes require at least a 2:12 slope for asphalt shingles with special
underlayment.
4. Flashing is primarily used to:
A. Secure shingles
, B. Prevent water penetration at joints
C. Improve ventilation
D. Add insulation
Correct Answer: B
Flashing seals roof intersections and penetrations to prevent leaks.
5. What is the function of a drip edge?
A. Support gutters
B. Direct water away from fascia
C. Vent attic air
D. Secure underlayment
Correct Answer: B
Drip edges guide water into gutters and protect fascia from moisture
damage.
6. Which tool is commonly used to cut asphalt shingles?
A. Tin snips
B. Utility knife
C. Circular saw
D. Hacksaw
Correct Answer: B
A utility knife provides clean and precise cuts for shingles.
7. What type of roof ventilation uses natural airflow through intake and
exhaust vents?
A. Mechanical ventilation
B. Passive ventilation
C. Forced ventilation
D. Closed ventilation
Correct Answer: B
Passive systems rely on temperature differences and airflow without
mechanical assistance.
8. Which material is most resistant to fire?
A. Wood shakes
, B. Asphalt shingles
C. Metal roofing
D. Rubber roofing
Correct Answer: C
Metal roofing has high fire resistance compared to combustible materials.
9. What is “roof pitch”?
A. Roof color
B. Roof material thickness
C. Roof slope
D. Roof weight
Correct Answer: C
Pitch refers to the steepness or slope of a roof.
10.Ice dams are primarily caused by:
A. Excess wind
B. Poor insulation and ventilation
C. Heavy shingles
D. Improper flashing
Correct Answer: B
Heat loss causes snow to melt and refreeze at eaves, forming ice dams.
11.What is the main purpose of a ridge vent?
A. Add structural strength
B. Allow hot air to escape
C. Prevent leaks
D. Support shingles
Correct Answer: B
Ridge vents allow warm air to exit the attic, improving ventilation.
12.Which roofing material is heaviest?
A. Asphalt shingles
B. Metal panels
C. Clay tiles
D. Wood shingles
