NRCA ROOFING MANUAL: STEEP-SLOPE ROOF SYSTEMS, 2025

NRCA ROOFING MANUAL: STEEP-SLOPE ROOF SYSTEMS, 2025 is part of our comprehensive contractor exam prep program designed to help you achieve your state licensing goals quickly and confidently. Whether you’re just starting your journey or upgrading your trade credentials, Contractor Exam Preps gives you the tools, knowledge, and confidence to succeed.

NRCA Roofing Manual : Steep-Slope Roof Systems, 2025

The 2025 edition of the National Roofing Contractors Association (NRCA) Roofing Manual for Steep-Slope Roof Systems offers updated guidance on design, materials, and installation techniques for roof systems on slopes greater than 3:12. The manual covers five major system types—Asphalt Shingle; Clay & Concrete Tile; Metal Shingle; Slate; and Wood Shake & Wood Shingle—and includes detailed chapters on roof decks, underlayments, primary coverings, and accessories. Notable updates include revised minimum plywood sheathing thicknesses, elimination of OSB panel recommendation for steep-slope decks, new high-wind-region provisions, and appendices addressing compliance with the International Building Code (IBC) 2024 and the International Residential Code (IRC) 2024, plus slate repairs and the Insurance Institute for Business & Home Safety (IBHS) FORTIFIED Roof™ program. This manual is suited for contractors, architects, and professionals preparing for licensing or certification in the roofing trade.

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