NRCA Roofing Manual: Steep-slope Roof Systems, 2025

The NRCA Roofing Manual: Steep-slope Roof Systems, 2025 manual provides you with valuable information about the design, materials and installation techniques applicable to steep-slope roof system applications. With five comprehensive sections—Asphalt Shingle Roof Systems, Clay and Concrete Tile Roof Systems, Metal Shingle Roof Systems, Slate Roof Systems, and Wood Shake and Wood Shingle Roof Systems—this manual is a welcome addition to your technical library.

Each section includes in-depth information about roof assembly configurations, roof decks, underlayments, materials, design and installation. Construction details are provided in each section as follows:

• Asphalt Shingle Roof Systems: 24 construction details
• Clay and Concrete Tile Roof Systems: 92 construction details
• Metal Shingle Roof Systems: 20 construction details
• Slate Roof Systems: 22 construction details
• Wood Shake and Wood Shingle Roof Systems: 76 construction details

Additionally, NRCA has updated and revised The NRCA Roofing Manual: Steep-slope Roof Systems—2025 content to maintain its position as an authoritative up-to-date industry reference. Notable changes include:

• New recommendations regarding other-than-wood roof deck and nailing substrate materials in steep-slope applications
• Revised recommendations for high-wind region steep-slope applications
• New and revised construction details
• Revised appendixes address steep-slope roof system compliance with IBC 2024 and IRC 2024 provisions
• New appendixes address roofing slate repairs and IBHS’s FORTIFIED RoofTM program