FM 1-40 focuses on which type of roofing system?

FM 1-40 focuses on which type of roofing system?

• A. Single-ply membranes
• B. Liquid-applied coatings only
• C. Multi-ply asphalt-based Built-Up Roofing (BUR) systems
• D. Insulation board standards

Answer: (C)

FM 1-40 targets built-up roofing systems that use multiple plies of asphalt-saturated felts laminated with bitumen. The standard sets the criteria for materials, ply arrangement, asphalt type, reinforcement, and workmanship to ensure a durable, waterproof, and wind-resistant roof assembly. This makes multi-ply asphalt-based BUR systems the focus. Other roofing families—single-ply membranes, liquid-applied coatings, or insulation-only standards—fall under different FM criteria, since they address different system configurations or components rather than a traditional BUR assembly.

FM 1-40 targets built-up roofing systems that use multiple plies of asphalt-saturated felts laminated with bitumen. The standard sets the criteria for materials, ply arrangement, asphalt type, reinforcement, and workmanship to ensure a durable, waterproof, and wind-resistant roof assembly. This makes multi-ply asphalt-based BUR systems the focus. Other roofing families—single-ply membranes, liquid-applied coatings, or insulation-only standards—fall under different FM criteria, since they address different system configurations or components rather than a traditional BUR assembly.