Pioneer Millworks Accoya® products offer unsurpassed performance levels and sustainability for natural outdoor siding, fencing, and now decking by using a scientifically proven modification process to improve its technical properties.

Accoya timbers are modified through to their core, providing the same performance and protection no matter how the wood is cut, planed, drilled, or shaped after processing. It is also less thermally absorbent than other types of wood or synthetic products, which keeps its surface temperature measurably cooler in direct sunlight. 

Pioneer Millworks offers Accoya in over a dozen different cladding finishes as well as our new Accoya® Color — Grey decking, that are all FSC-certified® and cradle-to-cradle certified making it a top choice for sustainability and material health for construction projects.

Accoya is the gold standard in naturally healthy outdoor building material options for longevity and low maintenance, even under the harshest weather conditions and is uniquely suited for the punishing outdoor conditions of coastal and oceanfront homes in any climate or weather zone.

How Accoya® is made:

The story of Accoya starts as a fast-growing pine tree (Pinus radiata) grown in well managed FSC-Certified® forests. The pine timbers are harvested once they reach maturity at around 30-years of growth. The raw timber is then subjected to a modification process as a milled plank or beam using acetic anhydride. This process is called acetylation, which sounds more nefarious than it is. Basically, the pine timbers are processed with a food grade vinegar treatment which chemically modifies the softwood pine to perform better than even some of the best hardwoods by preventing the cells in the wood from being able to absorb water. The result is high performing sustainable lumber with sustainability credentials that exceed those of man-made, intensely resource depleting, and heavily carbon-polluting alternatives.

Accoya is a sustainable material choice that helps meet global challenges like climate change. From source to production and through to the end of its life cycle, the sustainability of Accoya comes full circle. Accredited by Forest Stewardship Council® (FSC) and Cradle to Cradle (C2C), Accoya is the only construction material in the world to achieve C2C Platinum Certification™ for Material Health. Being that Accoya is really pine-gone-science it is like all wood, a carbon sink and thus helps combat carbon emissions for a healthier world. It is also a 100% nontoxic material choice which contains no biocides or harmful chemicals, safe for people and pets as well as the planet.

Accoya is so stable it is the only wood product in the world to offer a 50-year warranty for use above ground and 25-year warranty for use in ground or fresh water. Industry experts have even stated an expected service life of 70+ years in some cases. While all exterior materials will benefit from maintenance and cleaning throughout their lifecycle, requirements are substantially reduced with Accoya which only needs periodic cleaning if unfinished.

New in 2022: Accoya® Color – Grey Decking

Pioneer Millworks Accoya® Color — Grey Decking starts by going through the same modification process as our other Accoya products, but directly after the acetylation process these decking boards are then immersed in a dye that penetrates the wood to the core with pigment, meaning that any cut ends maintain their color without needing any additional stains or finishes, and the decking surface does not require refinishing throughout its lifecycle.

Accoya Color — Grey Decking has superior dimensional stability and durability, which means it’s not as susceptible to rot, warping, shrinking or swelling like other decking options. It can withstand the harshest of climates with minimal physical maintenance. It also has a low propensity to splinter and has low thermal gain in direct sunlight or in warm climates, making it a truly barefoot-friendly material under any foot.

Lean more: Accoya® Color - Grey Decking