Which standard would you use to rate wood shingles?

Which standard would you use to rate wood shingles?

• A. NFPA 101
• B. NFPA 256
• C. NFPA 70
• D. NFPA 13

Answer: (B)

Testing how quickly flame spreads through roof coverings is what determines the fire performance of wood shingles. NFPA 256 is the standard test method used to measure flame propagation of roofing materials, yielding a flame-spread rating that codes use to classify and label roof coverings like wood shingles. Because you need a roofing-specific flame-spread test, NFPA 256 is the correct standard. The other standards address unrelated topics: NFPA 101 covers life safety code requirements, NFPA 70 is the National Electrical Code, and NFPA 13 covers sprinkler systems, so they don’t apply to rating wood shingles.

Testing how quickly flame spreads through roof coverings is what determines the fire performance of wood shingles. NFPA 256 is the standard test method used to measure flame propagation of roofing materials, yielding a flame-spread rating that codes use to classify and label roof coverings like wood shingles. Because you need a roofing-specific flame-spread test, NFPA 256 is the correct standard. The other standards address unrelated topics: NFPA 101 covers life safety code requirements, NFPA 70 is the National Electrical Code, and NFPA 13 covers sprinkler systems, so they don’t apply to rating wood shingles.