How should a Building-integrated Photovoltaic System be designed when serving as a roof covering?

A Building-integrated Photovoltaic (BIPV) System, when used as a roof covering, must adhere to specific guidelines to ensure safety, efficiency, and compliance with construction standards. Section R905 pertains to the placement of roofing systems under the International Residential Code (IRC), providing comprehensive requirements regarding the installation of roofing materials, their structural integrity, and waterproofing capabilities.

Designing a BIPV system as a roof covering requires careful consideration of materials and installation methods to prevent issues such as leaks or structural failures. Section R905 addresses these critical aspects. This section incorporates factors such as load-bearing capacities and attachment techniques that are vital for any roofing system, which is particularly important when integrating photovoltaic cells that may alter the roof's weight distribution and drainage characteristics.

While local building codes and manufacturer specifications are indeed important for the overall compliance and performance of the system, Section R905 offers the specific guidelines that directly relate to the roofing function. NFPA guidelines, which focus on fire safety and prevention, are essential but don't specifically address the unique requirements of a roofing system that also serves as a photovoltaic component. Therefore, designing the system according to Section R905 ensures that all fundamental requirements for a roof covering are met while incorporating the photovoltaic elements effectively.