Siding makers launch new composites, vinyl colors Royal Building Products This house uses a variety of Royal Building Products, including Portsmouth-brand shake in Blue Gray near the peak and Marine Blue for the second level, vinyl trim in Marine Blue and Atlas Stone on the lower level. The pandemic-driven surge in home improvement projects continues to benefit sales of polymer siding with some manufacturers working around the clock to meet demand as they launch new colors and styles to grow their market share. Royal Building Products introduced five new colors of vinyl siding for 2021, new polypropylene shake and black PVC soffits for the modern farmhouse and other looks.