This volume of the NRCA Roofing Manual provides five complete sections--- Asphalt Shingle Roof Systems, Clay and Concrete Roof Systems, Metal Shingle and Synthetic Component Roof Systems, Slate Roof Systems, and Wood Shake and Wood Shingle Roof Systems
Starting July 1st 2021 the 2021 NRCA Steep-Slope Roof Systems will be used for contractor Licensing. Until then we will still be using the 2017 edition.
NRCA Roofing Manual: Steep-slope Roof Systems