Construction Supervisor License Practice Exam

What is the minimum pitch permissible for installing asphalt shingles on a detached single-family dwelling?

1. 2

2. 3

3. 4

4. 5

The correct answer is: 2

The minimum pitch permissible for installing asphalt shingles on a detached single-family dwelling is typically 2:12. This means for every 12 horizontal units, there is a minimum of 2 vertical units of rise. At this pitch, it is essential to ensure that the roof is structured properly to manage water runoff since lower pitches can lead to potential issues with water pooling and may require the use of certain types of underlayment or installation techniques to prevent leaks. While steeper pitches are often more favorable for asphalt shingles to promote water runoff and minimize the risk of water penetration, a 2:12 pitch is considered the industry standard minimum where asphalt shingles are concerned, as it still allows for water to shed adequately without necessitating specialized shingles or additional protective measures.