Which type of roof covering is NOT classified as Class A according to IBC 2015?

In the context of the International Building Code (IBC) 2015, Class A roof coverings are those that have the highest resistance to fire spread. Asphalt shingles are typically classified as Class B or Class C depending on their specific composition and the testing they have undergone. This classification is based on their performance during standard fire tests, which evaluate their ability to resist fire spread and ignition.

Brick and masonry coverings, on the other hand, are inherently non-combustible materials, giving them a natural classification of Class A due to their high fire resistance. Exposed concrete decking is also categorized as Class A for the same reasons. These materials do not contribute to fire spread and can withstand significant exposure to fire without igniting.

Understanding these classifications is vital for ensuring compliance with building codes and enhancing safety measures in construction practices, especially in fire-prone areas.