The NRCA Roofing Manual is the latest version of a long-standing series of NRCA publications that provide in-depth, best industry practices and technical information concerning the design, materials and installation of quality roof systems. Using the manual can help you better understand time-tested, successfully performing roof systems.
NRCA published A Manual of Roofing Practice in 1970. This was NRCA's first reference guide developed by roofing contractors to address good roofing practices. The manual was revised in 1971, 1973 and 1976. In its original and revised editions, being consistent with this era in the North American roofing industry, A Manual of Roofing Practice primarily addressed only built-up membrane roof systems.
In 1981, the first edition of The NRCA Roofing and Waterproofing Manual was published. This edition contained best roofing practices information for built-up membrane and steep-slope roof systems and a limited number of construction details. At the time, polymer-modified bitumen and single-ply membrane roof systems were just beginning to gain acceptance in the North American roofing industry. NRCA did not yet consider these roof systems to have achieved NRCA's best practice threshold to be included in the manual.