North Carolina Home Inspector Practice Exam

What type of roofing material is typically used for low-slope roofs?

1. Clay tiles

2. Asphalt shingles

3. Built-up roofing

4. Slate tiles

The correct answer is: Built-up roofing

Built-up roofing is often used for low-slope roofs due to its unique design and installation process, which is particularly suited for this type of roof configuration. Low-slope roofs have less than a 3:12 pitch, meaning they don't allow for adequate drainage if traditional roofing materials are used. Built-up roofing consists of multiple layers of asphalt, tar, and gravel, which create a seamless surface that can effectively shed water and withstand pooling. In contrast, other materials like clay tiles, asphalt shingles, and slate tiles are more commonly associated with steep-slope roofs. These materials rely on gravity for drainage, which is not effective on low-slope surfaces. This is why built-up roofing is the preferred choice for low-slope applications, as it provides durability, waterproofing, and effective drainage capabilities essential for preventing water infiltration and damage.