Metal roofing; metal shingles; metal roofing shingles; metal roofing and metal shingles incorporating photovoltaic cells, photovoltaic modules, photovoltaic inverters, solar cells, solar panels, solar wafers, solar collectors, solar thermal modules, solar heat collection panels, solar thermal air systems for heating purposes, solar and thermal receivers, solar and thermal reflectors, or solar and thermal concentrators
Metal GoodsNon-metal roofing; non-metal shingles; non-metal roofing shingles; non-metal roofing and non-metal shingles incorporating photovoltaic cells, photovoltaic modules, photovoltaic inverters, solar cells, solar panels, solar wafers, solar collectors, solar thermal modules, solar heat collection panels, solar thermal air systems for heating purposes, solar and thermal receivers, solar and thermal reflectors, or solar and thermal concentrators
Nonmetallic Building Materials