What is an acceptable roof slope for asphalt roofing sheeting?

Asphalt roofing sheeting is typically installed on roofs that have a minimum slope requirement to ensure proper drainage and performance. A slope of 2 units in 12, which means the roof rises 2 inches for every 12 inches of horizontal run, is the minimum standard for asphalt shingles. This slope is critical because it helps prevent water accumulation, which can lead to leaks and damage over time.

A slope of 2 in 12 is generally considered acceptable by various building codes and roofing manufacturers for asphalt roofing materials, balancing both water drainage and the roofing material's structural integrity.

Higher slopes, such as 3 in 12 or 4 in 12, are certainly more beneficial for drainage and can enhance the longevity of the roofing system. However, the question specifically asks for the minimum acceptable slope, making 2 in 12 the correct choice. This means that while other slopes may be preferable, they exceed the minimum requirement for asphalt sheeting.