Which statement best describes Class 'C' fire-resistance rating for roofing?

• A. Fire-resistance rating indicating light exposure to fire from outside.
• B. The highest fire-resistance rating for metal roofs.
• C. A rating indicating that no fire resistance is present.
• D. A moderate exposure rating used for wood shingles.

Answer: (A)

Class C describes how a roof covering performs under exterior fire exposure. It indicates the roof provides some resistance to fire coming from outside, but not as much as higher classifications. This means there is fire resistance, just at a lower level, so it’s not accurate to say there is no fire resistance. It isn’t the highest rating—that would be Class A (or higher performance under the same test standards). And it isn’t a category tied specifically to wood shingles; it’s a general rating used for roofing materials based on exterior-fire exposure tests.