Home Inspection State Practice Exam

What is the most appropriate roof covering for a roof with a slope of 1/2:12 above a family house?

1. Asphalt shingles.

2. Slate tiles.

3. Modified bitumen.

4. Metal roofing.

The correct answer is: Modified bitumen.

The most appropriate roof covering for a roof with a slope of 1/2:12 is modified bitumen. This low-slope or flat roofing option is designed specifically for roofs with a pitch that is too gentle to properly shed water, such as a 1/2:12 slope. Modified bitumen consists of a bitumen membrane that is reinforced, providing flexibility and durability, making it ideal for low-sloped applications. It also offers excellent waterproofing capabilities and can handle the thermal expansion and contraction that occurs with low-sloped roofs. As for asphalt shingles, they typically require a minimum slope of 2:12 to function well and avoid water infiltration, making them unsuitable for a roof with a 1/2:12 slope. Similarly, slate tiles are heavy and best suited for steeper slopes to allow efficient drainage and reduce the risk of water pooling. Metal roofing can be installed on lower slopes, but it is generally recommended for pitches higher than 1:12 to ensure proper water drainage and to minimize the risk of leaks. Therefore, modified bitumen stands out as the best choice for this particular roof slope.