North Carolina Home Inspector Practice Exam

Generally, how long can asphalt shingles last as a weather-resistant cover?

1. 5-15 years

2. 10-25 years

3. 15-30 years

4. 25-40 years

The correct answer is: 10-25 years

Asphalt shingles typically have a lifespan that ranges from about 10 to 25 years under normal conditions. This longevity can be influenced by several factors including the quality of the materials, installation practices, environmental conditions, and maintenance efforts. High-quality asphalt shingles, such as architectural or dimensional shingles, may last closer to the longer end of this range, while standard three-tab shingles might lean toward the shorter lifespan. Proper installation is crucial, as defects during this stage can significantly reduce the shingles' effectiveness and longevity. Additionally, elements like local climate, exposure to severe weather, and the angle of the roof can also determine how long the shingles will adequately protect a home against the elements. In contrast, the other ranges specified do not accurately reflect typical expectations for asphalt shingles. Lifespans shorter than 10 years are generally more representative of lower-quality or improperly installed roofing materials, while estimates extending beyond 25 years typically apply to higher-end roofing materials such as metal or tile roofs, rather than asphalt shingles.