Abstract: An environmentally friendly building system (20) for promoting long term carbon capture and sequestration of roofing and siding by utilizing recycled/upcycled, collapsed, preformed, and post consumer plastic material (32). The system includes a plurality of tiles (22). The plurality of tiles (22) interlock with each other to form overlapping courses of laterally staggered roofing or siding (24). Each tile (22) includes a bottle (28) and a cap connector (30). The cap connector (30) of each tile (22) caps off the bottle (28) of an associated tile, and hooks into the bottle laying on top thereof so as to hold the overlapping courses of the laterally staggered roofing or siding in place (24). The bottle (28) of each tile (22) is made from recycled/upcycled, collapsed, preformed, and post consumer plastic material (32) for promoting the long term carbon capture and sequestration of the laterally staggered roofing or siding so as to be environmentally friendly.