NRCA has been the professional voice of its members since 1886. With more than 3,600 members, NRCA is the leading authority in the roofing industry for information, education, technical assistance, advocacy, publications, programs and support that help your business grow.
The 2019 manual provides best industry practices and technical information about the design, materials and installation techniques applicable to membrane roof systems used in low-slope roof system applications.
NRCA's One Voice initiative focuses on one simple idea: Unite the roofing industry and speak with one voice about
matters critical to the industry's continued success. NRCA invites manufacturers, distributors, architects,
engineers, consultants and service providers to fully engage with NRCA, as partners, and actively address the
industry's most pressing issues.