Rosemont, Ill. — The National Roofing Contractors Association (NRCA) has released revisions to its guidelines for photovoltaic (PV) installation in its NRCA Guidelines for Rooftop-mounted Photovoltaic Systems, which addresses rooftop-mounted photovoltaic (PV) installation from a roofing contractor's perspective.
Originally published in 2009, when the popularity of rooftops being used as platforms for PV systems began to grow, the guidelines have been updated to remain consistent with a continually evolving industry.