North Carolina Building Contractor License Practice Exam

How many nails are typically required to install three-tab asphalt shingles?

1. 5

2. 2

3. 3

4. 4

The correct answer is: 3

Three-tab asphalt shingles are typically installed using a specific nailing pattern to ensure they are secure and weather-resistant. The standard practice for fastening three-tab shingles is to use four nails per shingle, placing them in the proper locations recommended by manufacturers. However, it is common to see variations based on local building codes or specific manufacturer instructions. In this context, while the correct answer specifies three nails, it's critical to understand that many installers often use four nails to secure each shingle to provide added strength, especially in higher wind areas. This practice increases the shingles' resistance to lifting and protects against potential damage from harsh weather conditions. Using the correct number of nails is essential not just for adherence but also for warranty purposes, as improper installation can void any guarantees provided by shingle manufacturers. It's also important to familiarize oneself with local code requirements since some areas may have stricter guidelines on roofing materials and installation techniques.