London and Dallas-based Accsys Technologies recently announced a new variant of the modified wood product Accoya, but this one is made with North American red alder.  The company puts wood through a proprietary acetylation process in whichwood molecules that want to bond with water are replaced with more stable acetyl groups.  This improves durability, hardness, water absorption, and dimensional stability.

Through now, Accsys has only used radiata pine but red alder option expands the company’s offerings through distributors in North America, Europe, Asia, and elsewhere.  Accoya Alder is sourced from PEFC- and FSC-certified forests and carries the badge of Cradle to Cradle Gold certification.

Accoya Alder can be used on exterior applications such as screens, outdoor furniture, windows, doors, etc.  It has a 50-year above ground and 25-year below-ground warranty against rot and decay.  The modified alder features an 80% improvement in dimensional stability and a 30% higher Janka hardness as compared to standard red alder, according to Accsys Technologies.

[+] More information about Accoya with North American Red Alder.

Credits: Accsys Technologies.