40 Hour Property and Building Inspection Practice Test

What impact do greater slopes have on shingles?

1. Decreased lifespan

2. Increased life

3. No impact

4. Higher maintenance costs

The correct answer is: Increased life

Greater slopes on roofs generally have a positive impact on the lifespan of shingles. This is primarily because steeper roofs allow for better drainage of water and moisture. When roofs have a significant slope, rainwater and melting snow are less likely to pool on the shingles. This reduced pooling minimizes the potential for water-related issues, such as leaks, mold growth, and deterioration of the roofing materials. Additionally, steeply sloped roofs are less prone to ice dam formation, which can occur on low-pitched roofs when the heat from the home melts snow on the roof, causing it to run down and then refreeze at the eaves. Such ice dams can lead to significant shingle damage and shorten their lifespan. Thus, the combination of improved drainage and decreased risk of water accumulation contributes to an increased life of shingles on roofs with greater slopes.