Accoya® is a high-performance modified wood engineered for exceptional durability, stability, and long-term reliability in exterior applications. Produced from sustainably sourced radiata pine, it undergoes an advanced acetylation process that permanently alters the wood at a molecular level—reducing its ability to absorb moisture and significantly improving performance. 

The result is real wood that resists rot, decay, and insect attack while maintaining its shape in even the most demanding climates. With minimal swelling, shrinking, or warping, Accoya delivers consistent performance over time and extends the lifespan of coatings and finishes. 

Unlike traditional treated lumber, Accoya is modified through to its core without the use of toxic preservatives, offering a sustainable solution that meets the demands of modern architecture. 

Backed by industry-leading warranties and proven long-term performance, Accoya is widely specified for cladding, decking, windows, doors, and other exterior applications where durability and dimensional stability are critical.