Residential Building Inspector B1Roof-Ceiling ConstructionMedium
A residential building inspector is performing a final inspection of a roof covering. The contractor has installed asphalt shingles on a roof with a pitch of 5:12. What is the minimum number of fasteners required per shingle for standard asphalt shingle application, excluding special high-wind areas?
- ATwo fasteners
- BFour fasteners
- CThree fasteners
- DSix fasteners
Show answer & explanationAnswer & explanation
Correct answer: B. Four fasteners
For standard asphalt shingle application on a roof with a pitch of 5:12, the IRC requires a minimum of four fasteners per shingle. Six fasteners are typically required in high-wind areas.
Why the other options are wrong
- A. Two fasteners are insufficient for standard asphalt shingle installation.
- C. Three fasteners are insufficient for standard asphalt shingle installation.
- D. Six fasteners are required for high-wind areas or specific shingle types, not standard application.
Asphalt Shingle Fastening
The number and placement of fasteners for asphalt shingles are critical for wind resistance and proper performance, varying by wind zone and shingle type.
- Standard application requires 4 fasteners per shingle.
- High-wind areas typically require 6 fasteners per shingle.
- Fasteners must penetrate through the sheathing or into the battens.
Memory trick: Four for normal, six for the storm.