Innovation in wood Language: English English Français Nederlands Deutsch Benefits Projects Windows & Doors Cladding, Siding & Facades Shutters & Louvres Decking Canals Bridges & Other Structural Landscape & Civil Works Garden Furniture Imagination Products Windows & Doors Cladding Decking Structural Sustainability Production Use End of Life Environmental Assessment Ecolabels Acquired The Future The Timber Transport CO2 Calculator Where to buy Downloads Marketing & Brochures Sales Information Resource Centre System Suppliers Contact More News & Events Accoya Academy Education Accoya Social & Videos Benefits Projects Products Sustainability Where to buy Downloads Contact News & Events Accoya Academy Education Accoya Social & Videos Partners & Licensing News Company Structure Investor Relations Careers Contact Us The Royal Arena Previous Next Copenhagen, Denmark Accoya® fins Reducing Environmental Impact, Improving Performance. Accoya® wood is the result of decades of research and development that has brought together a long-established, extensively proven wood modification technique and leading-edge patented technology – acetylation to create a high performance wood, ideal for outdoor use and challenging applications. Sustainable, Eco-Friendly & FSC® certified wood Close Accoya Performance Movie Close Show More Accoya® selected for stunning split-level West Vancouver home View Project Latest News Accoya® selected for the Squirrel Hill Passive House Duplex in Pittsburgh 14 Dec 16 Property and Home with Phil Spencer 14 Dec 16 Accoya® cladding scores full marks at performing arts school 07 Dec 16 Accoya selected for Wood City apartment façade in Helsinki 06 Dec 16 Acetylated wood course offers 1 Formal CPD point for Australian architects 29 Nov 16 View all News Show More Cradle to Cradle Products Innovation Institute Announces 2015 Award Recipient Read More Features & Benefits Key features Dimensionally stable Outstanding durability Perfect for coating Accoya® has properties that match or exceed those of the best tropical hardwoods and treated woods, yet is manufactured using wood from sustainable sources. Accoya® is the world’s leading high technology long life wood. Learn more Show More Accoya used for A.P.C Clothing Store View Project Show More Stunning curved Accoya wood cladding and shading in the Netherlands View Project Show More Accoya used to imitate the essence of a treehouse View Project Acetylation Process Step 1 Accoya is based upon acetylated wood technology, a process that has been studied by scientists around the world for more than 80 years. This method of improving wood has been proven to deliver such superior performance that it has long been used as the “gold standard” against which other methods are measured. Acetylation Process Step 2 The physical properties of any material are determined by its chemical structure. Wood contains an abundance of chemical groups called “free hydroxyls”. Free hydroxyl groups absorb and release water according to changes in the climatic conditions to which the wood is exposed. This is the main reason why wood swells and shrinks. It is also believed that the digestion of wood by enzymes initiates at the free hydroxyl sites – which is one of the principal reasons why wood is prone to decay. Acetylation Process Step 3 Acetylation effectively changes the free hydroxyls within the wood into acetyl groups. This is done by reacting the wood with acetic anhydride, which comes from acetic acid (vinegar when in dilute form). When the free hydroxyl group is transformed to an acetyl group, the ability of the wood to absorb water is greatly reduced, rendering the wood more dimensionally stable and extremely durable. Acetylation Process Step 4 Acetyl groups are already naturally present in all wood species. This means that the manufacturing process adds nothing into the wood that does not already occur within it. The end product, Accoya® wood, does not add toxins to the environment. The effect of altering the wood’s chemical structure, as opposed to merely altering its chemical content, is to create an end product that is dramatically superior to its source species. Acetylation Process Step 5 Accoya wood is modified right through the cross section whereas, by contrast, virtually all other treatments merely insert chemicals (such as oils, ammonia or metal compounds) into the wood, improving durability, to a degree, but not dimensional stability. Previous Next Where to buy Distributed in over 50 countries worldwide Find your nearest Accoya distributor through our ‘Where to buy’ page. Find out more WELCOME TO THE WORLD OF ACCOYA Watch the video Close Windows & doors with certainty With our 50 year guarantee homeowners can be assured that Accoya windows and doors will help your home reach its full potential. Take a look at our new Accoya windows and doors site for ideas, and to contact your local UK manufacturer. Find out more Latest Tweets Here at Accoya, we love updating you with what’s going on day-by-day in our world. You can follow us on Facebook, Twitter and Youtube for your daily fix of inspirational images, our latest news and industry news. View all Tweets 24 Dec 16 Accoya Wood Have a very #Merry #Christmas &amp; a wonderful new year everyone !! Prettige kerstdagen allemaal! &amp; Gelukkig Nieuwjaar… https://t.co/9YRazSZBq3 Reply Retweet Favourite 23 Dec 16 Accoya Wood RT @beechhalljoiner: @Accoya Hanbury manor bell tower in prep https://t.co/79zhpIjAnJ Reply Retweet 1 Favourite 22 Dec 16 Accoya Wood RT @CJoineryltd: Stunning @Accoya door set, Fully finished using @TeknosIndustry paint - Fully supplied and fitted by @CJoineryltd https://… Reply Retweet 2 Favourite 23 Dec 16 Accoya Wood RT @CJoineryltd: Stunning @Accoya door set Fully paint finished in Ten@TeknosIndustry paints, All quality ironmongery from @fromtheanvil by… Reply Retweet 1 Favourite 23 Dec 16 Accoya Wood RT @oxfordwoodworks: Summer house windows in @Accoya https://t.co/pM4u3K95ov Reply Retweet 1 Favourite 22 Dec 16 Accoya Wood RT @CrookesJoinery: Last block laid today on the extension. Now for the roof! #joinery #extension @iwmachines4wood @Sheffieldis @lathamsltd… Reply Retweet 3 Favourite ACCOYA TOOLKIT For distributors and manufacturers visit the Accoya® Toolkit for our latest marketing and sales collateral. To download brochures please go to Downloads page. Request Access CONTACT US For further information or feedback, visit our contact page. 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