Accoya Wood
Acetylated Modified Wood · 50-Year Warranty
Accoya
Pinus radiata (acetylated)
Accoya is a revolutionary modified wood created by acetylating sustainably sourced Radiata Pine through a non-toxic chemical process that permanently changes the wood's cell structure. This modification dramatically improves dimensional stability, durability, and decay resistance to levels matching or exceeding the best tropical hardwoods — all without toxic chemicals. Accoya is rapidly becoming the gold standard for exterior applications including windows, doors, cladding, and decking where performance and sustainability are paramount.
Janka Hardness
1100 lbf
Moderate
Density
32 lbs/ft³
Light
Shrinkage
Extremely low (minimal movement)
Exceptional stability
Appearance
Color: Light honey brown, similar to natural pine. Can be stained to any color. Weathers to silver-gray if left untreated.
Grain: Straight grain with fine to medium texture. Clean, consistent appearance typical of radiata pine.
Key Characteristics
- •Non-toxic acetylation process
- •Exceptional dimensional stability
- •Class 1 durability rating
- •Suitable for ground and water contact
- •50-year above-ground warranty
- •Fully recyclable and sustainable
Common Applications
Maintenance
Extremely low maintenance. Can be left unfinished to weather naturally. Paint and coatings last 2-3x longer than on conventional wood. 50+ year expected service life.
Advantages
- +50-year above-ground warranty
- +Minimal swelling and shrinkage
- +Non-toxic and cradle-to-cradle certified
- +Paint lasts much longer
- +Suitable for ground and water contact
- +Sustainable alternative to tropical hardwoods
Considerations
- •Higher initial cost than untreated pine
- •Limited color range without staining
- •Slightly more brittle than untreated
- •Not as hard as tropical hardwoods
- •Availability can be limited in some regions
- •Requires familiarity with modified wood handling