The concrete-based siding that we use is manufactured by CertainTeed. It contains more than 30% recycled material. This product offers a 50 year limited transferable product warranty (compared to 30 year warranty offered by the other leading concrete-based siding competitor). It comes in 16 designer colors and has a more authentic wood look. This product is both environmentally safe and consumer safe when cutting and installing the product without the need of a breathing apparatus or pump to rid the air of the silica chemical dust that is released from the competitor’s siding when it is cut.