19 Non-metallic building materials, namely, roofing panels, roof flashing, roofing tiles, roofing hips, vent covers for roof deck protrusions, drains and pitch pans, and roof trusses; non-metallic rigid pipes for construction purposes; non-metallic waterproofing materials, namely, waterproofing membranes for roofing, floors and walls; non-metallic rainwater downspouts; non-metallic gutters for the collection and evacuation of rainwater; non-metallic conduits for the collection and evacuation of rainwater; drain pipes not of metal or plastic; non-metallic roofing; building materials for roofs, namely, roofing membranes and non-metal roofing panels; non-metallic building materials for irrigating vegetated surfaces, namely, plastic water conduits for roofs and balconies; non-metallic materials for the construction of watertight vegetated roofs, terraces and facades, based on plant products, namely, roofing membranes