scope:

This standard applies to all flexible photovoltaic modules when adhered to, or mechanically fastened through, an FM Approved single-ply, polymer-modified bitumen sheet, built-up roof, liquid applied or metal roof cover assembly.

The standard is intended to evaluate only those hazards investigated and is not intended to determine suitability for the end use of a product.

This standard evaluates flexible photovoltaic modules for their performance in regard to fire from above the structural deck, simulated wind uplift, susceptibility from hail storm damage, and heat aging effects on the substrate.

Single-ply, polymer-modified bitumen sheet, built-up roof, and liquid applied roof cover systems that do not contain flexible photovoltaic modules shall be qualified in accordance with Approval Standard 4470. Standing seam or metal panel roofs that do not contain flexible photovoltaic modules shall be qualified in accordance with Approval Standard 4471.

This standard only addresses the photovoltaic module and does not address any other electrical component utilized to supply the generated electrical power to the building.

This standard does not intend to qualify rigid photovoltaic modules that are mechanically fastened using clips or other types of fasteners through single-ply, polymer-modified bitumen sheet, built-up roof, liquid applied roof systems or to standing seam or metal roofs. Rigid photovoltaic systems are evaluated per FM Approvals Standard 4478.

Purpose

This standard states Approval requirements for flexible photovoltaic modules that are used with an FM Approved roof assembly.