Asphalt shingle roof systems best practices guide now available
Materials, design and installation are included in the new guide from NRCA
The National Roofing Contractors Association has made available NRCA Guidelines for Asphalt Shingle Roof Systems. The publication provides best-practice guidelines and technical information concerning the materials, design, and installation of asphalt shingle roof systems. It also features the latest information about roof decks, underlayments, condensation control, and attic ventilation.