If the edge of the roof is within 3 feet of the property line, which roof classifications must be used?

• A. Class A only
• B. Class B only
• C. Class C only
• D. Class A, B, or C

Answer: (D)

When a roof edge sits within three feet of a property line, the structure must use a roof covering that has a recognized fire-resistance rating. The classifications Class A, Class B, and Class C represent different levels of fire resistance. The key point is that you’re not limited to a single rating here; you can use any of these classifications as long as the product is listed and installed correctly for that assembly. So, depending on the specific roofing material and its listing, a Class A, Class B, or Class C roof covering may be used near the property line.