Accoya Alder, an addition to Accoya’s Accsys product range, is Cradle to Cradle Gold certified. The wood is obtained from FSC-certified sources. During manufacturing, it undergoes a proprietary modification process to improve its durability, hardness, and dimensional stability. According to the company, it has an 80 percent improved dimensional stability, retained strength and stiffness, and a 30 percent higher Janke hardness than pre-modified wood. The Cradle to Cradle certification means that the product includes no trace of problematic chemicals, and uses over 50 percent renewable energy during the manufacturing process. It carries a 50-year above-ground warranty and a 25-year below-ground warranty against rot and decay.