This is a used copy, that is still in good condition and ready to be used at the test center. To purchase a new, unused copy of this book click here. The latest volume of the NRCA Roofing Manual provides you with comprehensive information about the design, materials and installation techniques applicable to metal panel and spray polyurethane foam roof systems used in low and steep-slope applications. With two complete sections, Metal Panel Roof Systems and SPF Roof Systems, this manual is a welcome addition to your technical library.