Which type of roof covering is most effective in preventing the spread of fires from flying brands?

Which type of roof covering is most effective in preventing the spread of fires from flying brands?
A . Class A
B . Class B
C . Class C
D . Class D

View Answer

Answer: A

Explanation:

Class A roof coverings are the most effective in preventing the spread of fires from flying brands. Flying brands are burning embers or pieces of combustible material that are carried by the wind and can ignite other combustible materials or structures. Class A roof coverings are tested to withstand severe fire exposure from simulated fire sources, such as large burning brands, and do not produce flying brands themselves. Class A roof coverings include materials such as asphalt shingles, metal sheets, clay or concrete tiles, slate, and some types of synthetic membranes12.

References:

Class A, B, and C Roof Ratings – UL

Fire-Resistant Roofs – Fire Safe Marin