Americana™ is a new generation of Thermally Modified Pennsylvania Ash, Oak, and Poplar Decking, Siding and Porch Flooring, transformed by heat and steam, for long-lasting beauty in outdoor living spaces. Americana™ is real wood for the real world. Decking, siding, porch flooring. Made with wood + heat + steam...and that's it. No chemicals, no plastics, nothing but pure, natural Pennsylvania hardwood.