All wood is treated by Madison Wood Preservers, a licensed producer of treated wood products for more than 60 years. MicroPro® technology is a revolutionary way to pressure treat wood. Using micronized copper preservatives, MicroPro offers many benefits including significantly improved corrosion performance. It is ideal for use as decking, railing and structural deck components, walkways, and other backyard projects. (Because Madison Wood believes in leading the industry Best Practice, all of our products are now treated to Ground Contact.) Madison Wood comes with warranted protection against termites and fungal decay (see warranty for terms of coverage). Wood is a renewable resource that can be treated to last for decades, reducing demands on forests.