Keeping current

NRCA updates and revises its guidelines for rooftop PV system installation

When the popularity of rooftops being used as platforms for photovoltaic (PV) systems began to grow, NRCA recognized the need to produce guidelines to assist the construction industry. NRCA was one of the first organizations to publish PV guidelines for rooftop applications. As the PV and roofing industries constantly evolve, NRCA continues to revise its guidelines. In June, NRCA published NRCA Guidelines for Rooftop-mounted Photovoltaic Systems to present the latest information about rooftop-mounted PV systems.

The updated guidelines contain relevant information about rooftop-mounted PV application from the most current editions of model building codes and standards. It also presents NRCA's latest best-practice guidelines for the design and installation of rooftop-mounted PV systems. Information was collected by NRCA from knowledgeable, practicing roofing contractors located throughout the U.S. who are experienced with PV system installations. The guide will be a valuable resource for roofing professionals working with rooftop-mounted PV systems.

History of the guide

NRCA published its first guidelines applicable to rooftop-mounted PV systems in 2009 as Guidelines for Roof-mounted Photovoltaic System Installations. In 2012, NRCA updated the guidelines and renamed the publication NRCA Guidelines for Roof Systems With Rooftop Photovoltaic Components. The 2012 publication contained updated technical information and incorporated some of the suggested changes from feedback NRCA received. It also included code compliance information applicable to roof-mounted PV components based on NFPA (National Fire Protection Association) 70:® National Electrical Code® (NEC®), 2011 Edition; 2012 International Building Code® (IBC); 2012 International Fire Code® (IFC); and NFPA 1: Fire Code, 2012 Edition.

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