Steep-slope roofs

Solar system installations over steep-slope roofs are advisable only if the roof system has been designed for future solar system installation. NRCA recommends steep-slope roof systems intended for solar system installation include the following features:

  • Highly heat-resistant roofing materials, including the primary roof covering and underlayment
  • Solar system support and flashing components be performed during the roof system installation
  • Provisions to raise rack-mounted solar modules above the roof surface to ensure unobstructed drainage and ventilation space under the solar modules

For specific design details, drawings and more NRCA recommendations, the Rooftop Solar Resource suggests you purchase NRCA Guidelines for Roof Systems with Rooftop Photovoltaic Components.

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