19 Building materials, namely, non-metal pipe flashing in the nature of building flashing, and roof flashing; building products, namely, roof flashing, not of metal; non-metal roof vents for heating, cooling, solar, ventilation, in residential and commercial buildings; residential and commercial non-metallic residential and commercial building materials, namely, asphalt roof coatings, asphalt roofing paper, asphalt sealant, asphalted felts, bitumen-based sealants for roofing, bituminous roof coatings, felt roof coverings, roofing, roofing cement, non-metal roof ridge vents, fibered and non-fibered aluminum roof coatings, fibered and non-fibered bitumen roof coatings, fibered and non-fibered modified bitumen roof coatings, flashing cement for use in roofing, plastic roofing cement, bitumen-based roofing sealants, modified bitumen roll roofing, roofing underlayment; roofing membranes; building products, namely, non-metal specialty roofing products used in the roofing of residential and commercial buildings, namely, roofing felt, asphalt-based roofing mastics, non-asphalt based roofing mastics in the nature of hydrocarbon resin-based, thermoplastic elastomer-based and silicone-based roofing mastics, cement fillers, waterproofing membranes