CSLB C-39 Roofing ContractorSteep-Slope RoofingEasy
A roofing crew is installing standard asphalt strip shingles on a normal-slope residential roof in a non-high-wind area. Per manufacturer and code guidelines, how many nails should be driven per shingle?
- A2 nails
- B8 nails
- C4 nails
- D6 nails
Show answer & explanationAnswer & explanation
Correct answer: C. 4 nails
Standard asphalt strip shingle installation requires four nails per shingle placed in the nailing zone above the cutouts, spaced evenly across the shingle width; six nails are required only in high-wind regions.
Why the other options are wrong
- A. 2 nails is insufficient and would not meet code for wind uplift resistance.
- B. 8 nails is excessive and not a recognized standard pattern.
- D. 6 nails applies to high-wind zones, not standard installations.
Standard Shingle Nailing Pattern
The required number and placement of fasteners per shingle to meet wind resistance standards.
- 4 nails standard; 6 nails in high-wind areas
- Nails placed in designated nailing zone above cutouts
- Improper placement voids manufacturer warranty
Memory trick: Four is the norm, six when winds storm.