NRCA Roofing Manual: Steep-Slope Roof Systems, 2025

​The NRCA Roofing Manual: Steep-Slope Roof Systems—2021 is a comprehensive guide published by the National Roofing Contractors Association (NRCA), focusing on the design, materials, and installation techniques for steep-slope roof systems. This manual is organized into five detailed sections covering various roofing materials and systems.