Accoya® wood is modified all the way through, not just at the surface like traditional envelope treatments. This modification technique has two key advantages:

Using an array of sophisticated and proven analytical techniques, the producers of Accoya® wood ensure that every batch is of consistent quality and reaches the highest possible level in durability and dimensional stability versus the unpredictablity of other choices When Accoya® wood is cut or jointed there are no exposed nonacetylated surfaces in any dimension. This completely negates the need to apply additional chemical preservatives on-site, as is necessary with unmodified or envelope-treated woods.


Accoya® wood is produced from sustainably sourced, fast growing wood and manufactured using Accsys’ proprietary patented modification process from surface to core.


Accoya® wood has been tested over prolonged periods in all types of weathering conditions – above ground, below ground and even in water – and has been proven to withstand even the toughest of external environments. Not only is its durability proven, but it has also been shown to retain its appearance, requiring much less frequent maintenance than other wood species. This gives added reassurance to the manufacturers, architects, specifiers, builders and property owners who have chosen Accoya® wood for a diverse range of projects. Accoya® wood is also being tested for additional uses by leading independent institutes worldwide.