Roofing CONTRACTOR Newest
PRACTICE EXAM 2025-2026 (100
QUESTIONS And Answers)
1. What is the minimum slope required for asphalt shingles on a roof with only
one layer of underlayment?
A. 2:12
B. 4:12
C. 3:12
D. 1:12
Asphalt shingles require at least a 4:12 slope for effective water runoff with one
underlayment layer.
2. What component of a roofing system prevents water infiltration at
intersections and valleys?
A. Drip edge
B. Ridge cap
C. Flashing
D. Fascia
Flashing seals vulnerable areas like valleys, chimneys, and joints against leaks.
3. Which material is typically used for flat or low-slope roofs?
A. Wood shingles
B. Clay tiles
C. EPDM membrane
D. Asphalt shingles
EPDM rubber is ideal for low-slope or flat roofs due to flexibility and
waterproofing.
,4. When installing roof decking, nails should penetrate at least:
A. ½ inch into the joist
B. ¾ inch into the joist
C. 1 inch into the supporting member
D. Through the entire joist
Building codes require at least 1 inch penetration for secure fastening.
5. What is the function of ridge vents?
A. Stop water infiltration
B. Prevent bird nesting
C. Allow attic ventilation
D. Reduce noise
Ridge vents promote airflow, reducing heat and moisture accumulation.
6. What is the purpose of an ice and water shield?
A. Prevent UV damage
B. Prevent water infiltration from ice dams
C. Reflect solar radiation
D. Reinforce ridge lines
Ice and water shield membranes protect vulnerable eaves and valleys from ice
dam leaks.
7. The most common roof decking material in residential construction is:
A. Plywood
B. Oriented Strand Board (OSB)
C. Either A or B
D. Metal decking
Both plywood and OSB are accepted, though OSB is more economical.
, 8. The typical life expectancy of asphalt shingles is:
A. 10 years
B. 15 years
C. 20–30 years
D. 40–50 years
Standard asphalt shingles last about 25 years depending on maintenance.
9. The underlayment beneath shingles is primarily used to:
A. Add insulation
B. Strengthen decking
C. Provide a secondary water barrier
D. Enhance aesthetics
Underlayment acts as a backup moisture barrier beneath shingles.
10. When overlapping roofing felt, the lap should be at least:
A. 1 inch
B. 2 inches
C. 4 inches
D. 6 inches
A 4-inch overlap ensures continuous coverage against moisture intrusion.
11. What type of nail is typically used for asphalt shingles?
A. Spiral shank
B. Roofing nail with ¾-inch head
C. Galvanized roofing nail
D. Finishing nail
Galvanized nails resist rust and are standard for shingles.
12. Roof pitch is defined as:
PRACTICE EXAM 2025-2026 (100
QUESTIONS And Answers)
1. What is the minimum slope required for asphalt shingles on a roof with only
one layer of underlayment?
A. 2:12
B. 4:12
C. 3:12
D. 1:12
Asphalt shingles require at least a 4:12 slope for effective water runoff with one
underlayment layer.
2. What component of a roofing system prevents water infiltration at
intersections and valleys?
A. Drip edge
B. Ridge cap
C. Flashing
D. Fascia
Flashing seals vulnerable areas like valleys, chimneys, and joints against leaks.
3. Which material is typically used for flat or low-slope roofs?
A. Wood shingles
B. Clay tiles
C. EPDM membrane
D. Asphalt shingles
EPDM rubber is ideal for low-slope or flat roofs due to flexibility and
waterproofing.
,4. When installing roof decking, nails should penetrate at least:
A. ½ inch into the joist
B. ¾ inch into the joist
C. 1 inch into the supporting member
D. Through the entire joist
Building codes require at least 1 inch penetration for secure fastening.
5. What is the function of ridge vents?
A. Stop water infiltration
B. Prevent bird nesting
C. Allow attic ventilation
D. Reduce noise
Ridge vents promote airflow, reducing heat and moisture accumulation.
6. What is the purpose of an ice and water shield?
A. Prevent UV damage
B. Prevent water infiltration from ice dams
C. Reflect solar radiation
D. Reinforce ridge lines
Ice and water shield membranes protect vulnerable eaves and valleys from ice
dam leaks.
7. The most common roof decking material in residential construction is:
A. Plywood
B. Oriented Strand Board (OSB)
C. Either A or B
D. Metal decking
Both plywood and OSB are accepted, though OSB is more economical.
, 8. The typical life expectancy of asphalt shingles is:
A. 10 years
B. 15 years
C. 20–30 years
D. 40–50 years
Standard asphalt shingles last about 25 years depending on maintenance.
9. The underlayment beneath shingles is primarily used to:
A. Add insulation
B. Strengthen decking
C. Provide a secondary water barrier
D. Enhance aesthetics
Underlayment acts as a backup moisture barrier beneath shingles.
10. When overlapping roofing felt, the lap should be at least:
A. 1 inch
B. 2 inches
C. 4 inches
D. 6 inches
A 4-inch overlap ensures continuous coverage against moisture intrusion.
11. What type of nail is typically used for asphalt shingles?
A. Spiral shank
B. Roofing nail with ¾-inch head
C. Galvanized roofing nail
D. Finishing nail
Galvanized nails resist rust and are standard for shingles.
12. Roof pitch is defined as:
