Accoya turns everything you know about wood upside down. The benefits of Accoya mean that wood projects can now be designed with absolute confidence. whaT IS ACCOYA? Redefining the World of Wood Accoya is a modified wood type that stands out with its superior durability and dimensional stability. Thanks to the acetylation process, it gains maximum resistance to decay, swelling, and shrinkage. This innovative process turns Accoya into a longer-lasting and low-maintenance material compared to traditional wood species. The Most Durable and Stable The Best Wood in the World Accoya wood is produced in the city of Arnhem, the Netherlands, in a high-tech facility using fast-growing and certified sustainable timber. Modified through acetylation technology, this unique wood achieves exceptional durability and dimensional stability, making it a superior alternative to traditional materials. Compared to energy- and resource-intensive materials, Accoya is a low-carbon solution that maintains high performance with minimal environmental impact. Its long service life and resistance to decay, swelling, and deformation make it a reliable material for long-term projects. Accoya is certified for sustainability and performance, making it a strong and responsible choice for architects and designers worldwide. Lifetime Use Why Choose Accoya Wood? Since its launch in 2007, Accoya has been a trusted choice by manufacturers worldwide. From windows and doors to decking, cladding, and outdoor furniture, Accoya has been used in a wide range of demanding applications. Thanks to its durability and high performance, it stands out in architectural wood applications and extreme conditions. Its long lifespan and eco-friendly features make Accoya the ideal sustainable wood solution. Çapa 1 ACETYLATION PROCESS How Does the Modified Wood Process Work? 1 Hydroxyl Groups Wood's Water Sensitivity Natural wood contains water-attracting hydroxyl groups, which cause swelling and shrinkage. Over time, this leads to deformation and reduced durability. 2 Acetyl Groups Natural Water Resistance By replacing hydroxyl groups with acetyl groups, wood becomes more water-resistant and stable, reducing the risk of swelling and rot. 3 Acetylation Chemical Transformation for Moisture Resistance Wood is treated with acetic anhydride, which chemically changes its structure to enhance moisture resistance, minimize swelling, and extend lifespan. 4 Acetylated Wood Maximum Durability & Sustainability Accoya retains the same elements as natural wood but with increased acetyl content, resulting in outstanding durability, minimal maintenance, and superior dimensional stability. Acetylated Wood Accoya The Foundation of Superior Durability Accoya gains exceptional durability, dimensional stability, and high resistance to decay compared to traditional wood through an innovative modification process called acetylation. This advanced technology strengthens the wood’s cellular structure permanently, minimizing swelling, shrinking, and deformation. Thanks to this innovative process, Accoya becomes a long-lasting wood solution backed by a 50-year warranty. Additionally, it stands out as an eco-friendly building material since it is produced from FSC® certified sustainable sources and contains no toxic substances. Developed with acetylation technology, Accoya sets a new standard in the construction industry in terms of sustainability, durability, and low maintenance requirements.

Accoya wood facade applications provide natural aesthetics and superior durability to your buildings. Check out the perfect wood solutions for both modern and classic facades. Cladding Ideal for Future Generations Exterior cladding must offer durable, aesthetic and low-maintenance solutions against harsh weather conditions. Accoya outperforms even the most durable tropical wood species, ensuring long-lasting use. With its exceptional stability and resistance to decay, it is a reliable option in all climate conditions. For coatings Ideal Choice Combining the aesthetics of natural wood with superior durability and strength, Accoya offers long-lasting performance in cladding. Backed by world-leading sustainability credentials and certifications, Accoya promotes sustainable forest management by minimizing environmental impacts. Accoya cladding is a reliable alternative that preserves natural resources and provides a sustainable building solution for future generations. Features PERFORMANCE Environment, Time and Design Exterior wood cladding must be resistant to harsh weather conditions. Accoya claddings remain intact for many years with high resistance to decay. Thanks to their superior stability, they require minimal maintenance and offer a long-lasting solution. They are a sustainable alternative with lower maintenance costs compared to traditional wood claddings. Accoya is a reliable exterior cladding option that provides lasting performance and aesthetic appearance. RESULT Aesthetic Vision When Accoya Wood is left in its natural state, your exterior cladding will take on a natural patina over time and breathe. However, when a surface coating is applied, Accoya cladding provides a superior final surface. Its treated surface combines durability and aesthetics to provide long-lasting protection. It maintains the integrity of the wood by offering high resistance to cracking, swelling and deterioration. Thus, you can achieve an aesthetic and durable exterior for years with minimal maintenance. SUSTAINANILITY Unrivaled Accoya offers a reliable wood solution with its structure suitable for long-term use, maintaining its durability for years. It minimizes the need for maintenance thanks to its superior stability and high resistance to decay. Accoya creates a sustainable alternative with its environmentally friendly production process while meeting your aesthetic expectations. It provides long-term performance on exterior facades with its natural beauty and durable structure. Thus, it is an ideal choice both in architectural projects and in terms of environmental responsibility. Tests Conducted by BM TRADA Durability with Exceptional Performance Superior Stability Leading wood research institute BM Trada cyclically exposed coated boards to wet and ambient conditions to assess Accoya’s stability. The tests found that Accoya has exceptional dimensional stability and that the cladding can be expanded from standard 150 mm wide profiles to 200 mm. These results prove that Accoya offers more flexible design options and stands out with its superior performance compared to other types of wood. Coating Performance BM Trada compared Accoya cladding with pine and Siberian larch in a series of durability tests launched in Buckinghamshire, England in February 2007. The same translucent black coating was used to ensure maximum radiant heat generation and to test resistance to natural weathering. After 3.5 years of testing, Accoya was found to have superior performance compared to pine and Siberian larch. While pine cladding showed cracking, resin leakage, paint peeling and surface deterioration, Siberian larch showed resin pockets and surface deformation. Accoya maintained its durability without any swelling, cracking or paint peeling on its surface. It was proven that external dirt can be easily cleaned, providing a durable and clean surface. These tests clearly demonstrate that Accoya has superior cladding performance compared to competing materials. Catalogs Superior Durability Assessed by BRE Although BS EN 350-2 does not apply to modified timber, Accoya has achieved Durability Class 1, the highest level for natural timber, in an assessment by BRE. Accoya therefore meets the service life criteria set out in the BS 8417 standard, fully complying with the 60 year designed service life requirements that only timbers with Durability Class 1 certification are eligible for. This superior durability demonstrates that Accoya offers a long-lasting and reliable timber solution. Contact Guarantees Accoya offers long-lasting performance with a warranty period of over 50 years in exterior cladding. It provides an aesthetic and sustainable solution thanks to its high resistance to decay and deformation. Ideal Cladding Solution Different cladding options can add aesthetics and functionality to your projects. Accoya exterior cladding offers excellent surface quality with outstanding durability. Extremely Stable Accoya exterior claddings show high resistance to decay and deformation. With its long-lasting structure and low maintenance cost, it delivers lasting performance. Extremely Durable Accoya claddings do not contain toxic substances or harmful chemicals. FSC® certified, it offers an eco-friendly solution made from sustainable wood. A Stunning Experience Summer House with Charred Accoya Exterior Cladding Delta Millworks, located in New York, produced a unique four-season summer house exterior cladding using Accoya. The Accoya wood supplied by Universal Forest Products was charred using the traditional Japanese “Shou Sugi Ban” method, giving the façade a modern and weathered texture. This technique created a striking and deep visual effect. Delta discovered that the charred Accoya developed superior density and durability compared to other wood types. Accoya’s natural dimensional stability combined with charring created a strong foundation for long-lasting performance. DECkING SIDING DOORS & WINDOWS INSPIRING PROJECTS

Now you can use wood in ways you never imagined possible. From innovative structures and impressive underwater bridges to outdoor sculptures, landscape timbers and art installations. ​ Inspired by Nature Infinite Design Freedom Imagined, designed and brought to life by Accoya. Source of Inspiration You Set the Limits Accoya brings the authentic beauty of real wood to projects traditionally dominated by steel and concrete by offering structural stability and design freedom. Its superior durability and resistance to environmental conditions allow a wide range of applications—from bridges and outdoor sculptures to pergolas and art installations. Accoya, a wood solution that merges aesthetics, durability, and sustainability, offers endless creative potential for innovative architectural projects. FSC® certified and sourced from renewable materials, Accoya is a responsible choice for future generations thanks to its low carbon footprint. With its natural beauty and advanced performance properties, Accoya enables flawless results in outdoor design. Dare to push boundaries—Accoya is your path to original, sustainable, and enduring design. Features PERFORMANCE Unmatched Accoya’s proven durability is backed by rigorous testing and industry-leading warranty periods. Its high resistance to rot, swelling, and warping ensures a long service life. Supported by a 50-year warranty, Accoya is a trusted solution for timber projects, providing long-term confidence in product performance. RESULT Built to Last Accoya offers a wide range of surface options including smooth, brushed, and charred finishes. Thanks to its superior stability, it minimizes warping and reduces maintenance needs while maximizing longevity. Its durable structure resists rot, swelling, and warping—making Accoya a reliable and sustainable wood alternative for both functional and aesthetic needs. SUSTAINANILITY Leading the Future In a world facing climate change, ecosystem degradation, and limited renewable resources, Accoya is a truly sustainable solution. With a low carbon footprint and long lifespan, it offers environmental benefits and is sourced from certified sustainable forests. Accoya is the responsible choice for eco-conscious projects and future generations. Design Freely Imagine Boldly Accoya offers structural stability and design flexibility as a sustainable alternative to steel and concrete. It combines the natural warmth of wood with outstanding performance, eliminating the need for frequent maintenance. Its resistance to rot, warping, and harsh weather makes it ideal for a wide range of architectural applications. From garden furniture and decks to independent backyard offices, Accoya unlocks creative possibilities in both residential and commercial settings. Whether used for stylish wooden facades, durable doors, or custom furniture, Accoya blends aesthetics with sustainability and sets a new standard for modern timber use. Projects Moses Bridge Innovative and Award-Winning Located in Fort de Roovere, Netherlands, this historic fortress required a new access bridge that would respect its heritage. A traditional bridge would have disrupted the visual harmony of the site. To overcome this challenge, RO&AD architects designed a nearly invisible sunken bridge—The Moses Bridge. It cuts through the water, descending from the fortress to the moat floor, aligning seamlessly with the water level and landscape. This unique structure allows visitors to approach the fortress unnoticed, ensuring perfect architectural harmony and natural integration. Accoya wood was used for the bridge’s deck and stairs, offering long-lasting performance and water resistance. Accoya’s high durability, water resistance, and minimal maintenance needs made it an ideal material for this project, contributing to both aesthetics and environmental sustainability. Guarantees Accoya guarantees durability and performance for 50 years. For below-ground and marine applications, it offers 25 years of reliable use. Low Maintenance Compared to other wood types, Accoya has a low shrink and swell rate. This ensures long-term durability, reduces maintenance costs, and preserves aesthetic appeal. Multiple Finishes Accoya offers a wide variety of surface options to match any design need. Its versatility allows for unique and customized applications in your projects. Natural Wood Accoya windows and doors help improve energy efficiency and reduce heating bills through excellent insulation. Its low-maintenance nature saves time, cost, and effort. Creativity and Craftsmanship Perfect Harmony with Nature Thanks to its dimensional stability and low swelling/shrinkage, Accoya is ideal for artistic installations, intricate structures, and custom architectural designs. It maintains its form even in outdoor conditions that cause traditional wood to deform over time. Accoya is made from fully sustainable FSC® certified wood, blending naturally into the environment. Its low carbon footprint makes it a responsible material choice for future generations. With a long service life and no need for frequent replacement or finishing, Accoya offers cost savings and consistent quality. Let your creativity flourish—Accoya makes room for unique and unforgettable structures that combine elegance, durability, and sustainability. Contact deckING SIDING DOOR & WINDOWS INSPIRING PROJECTS

With its durability, sustainability and aesthetic appearance, Accoya wood cladding is an excellent choice for long-lasting and environmentally friendly projects. Click for details. SIDING PROJECTS Accoya offers an ideal solution for exterior cladding with its superior durability and aesthetic appearance. It provides long-term protection against deformation, decay and color fading thanks to its high resistance to extreme weather conditions. With its low maintenance requirement, it maintains its first-day appearance and performance for years. Özel Mülk Urla Accoya Kampüs Projesi Kanada Özel Villa Projesi Balıkesir Accoya ile Kömürleşmiş Düşük Karbonlu Bina Fransa Sunset Clifss Rezidansı Amerika İzmir'de Özel Mülk Çeşme Roche Diagnostik Genel Merkezi İspanya Sürdürülebilir Fabrika Tekirdağ Podyum Otoparkı İngiltere Sedbergh Spor Merkezi İngiltere Urla'da Bir Ev İzmir Bono Cafe Akyaka Highlands ve Adalar Üniversitesi İngiltere Barnsnap Rezidans İngiltere Waldens Çiftlik Evi İngiltere Ormanlık Evler Litvanya Ahşap Sanat Evi Hollanda Squirrel Hill Pasif Ev Amerika Minnewaska Eyalet Parkı Amerika Sahil Evi Avustralya Rotterdam Oteli Hollanda Kreatif Ahşap Ev İngiltere Marisol Rezidans Malibu Hollanda Kumulları Hollanda Whalen Rezidans İngiltere Inverness, Scotland Solasta House In the Inverness College project, located within the University of the Highlands and Islands (UHI) in Inverness, Scotland, Accoya timber cladding was supplied by Accoya-approved distributor Russwood. Accoya timber, which stands out with its natural and low-maintenance structure, was the preferred material for the exterior cladding. Threesixty Architecture, which undertook the architectural design of the project, preferred the Accoya cladding provided by Russwood and the profile dimensions used were determined as 47mm × 25mm and 73mm × 50mm (on the edge). Before the application, the cladding was specially coated with Teknos FI-024 by Russwood in the factory. This process increased the resistance of the wood to natural weather conditions, while giving the structure a warm texture and aesthetic integrity. Russwood supplied A1 quality Accoya timber in accordance with the project requirements and offered it in a modular system in panels measuring 150mm x 50mm in order to speed up the assembly process. Robertson Construction, the project’s main contractor, successfully completed the installation of the Accoya exterior cladding. Malibu, America Zero Carbon Certified Housing in Malibu This private residence’s exterior cladding, ceilings and interior paneling are made of FSC-certified Accoya wood. As seen in the image, the ceiling of the room is covered with 25-meter Accoya wood panels, and there are skylights at the top providing natural light. In addition, Accoya woods treated with Delta Black coating by Delta Millworks were used as decorative cladding around the fireplace. On Pointe Design, who undertook the interior architecture of the project, explains the reason for choosing Accoya around the fireplace as follows: “By using a zero-emission fireplace, we were able to use combustible shou sugi ban treated wood directly flush with the fire chamber.” Shou sugi ban is a traditional Japanese technique that allows the surface of the wood to be burned in a controlled manner, making it resistant to water and weather conditions. On Pointe Design stated that they preferred FSC-certified Accoya wood as a sustainable alternative to traditionally used cedar wood for this special surface treatment technique. The Accoya wooden exterior cladding used in this project was supplied and applied in accordance with international sustainability standards. Designed with the goal of zero carbon emissions, this luxury residence stands out as a pioneering structure in terms of environmental sustainability. Terschelling, Holland Unique View to the Dutch Sand Dunes This private residence on the Dutch coastline is located in a position with a magnificent view of the world-famous sand dunes, offering its residents the opportunity to experience this unique natural beauty every day. Starting with a concrete base layer, the structure is constructed using cross-laminated timber (CLT) and steel construction, and finally completed with a steeply sloped, asymmetrical roof covered with Accoya wood. The natural Accoya wood will mature to a platinum grey color over time and become part of the natural landscape, integrating with the dunes. In addition, thanks to the skylight placed on the roof, it offers the opportunity to look out over the island and other surrounding houses from a high perspective while on the mezzanine floor under the roof dome. This sustainable and nature-compatible design makes a difference with its natural materials, modern architectural solutions and details that integrate with the environment, bringing a new breath to the architecture in the region.

Accoya wood deck applications offer a long-lasting and stylish solution for any outdoor space. Discover the ideal deck solutions with high durability and low maintenance requirements. Decking High Performance Accoya offers superior durability while preserving the authentic texture and aesthetic appeal of natural wood. It resists wear and weathering in all climate conditions and requires minimal maintenance. With its resistance to cracks and splinters, it provides a long-lasting and comfortable decking solution. Seamless Experience With Every Step Accoya wood offers the authentic appearance of real wood and barefoot comfort with its natural texture. But that’s not all — it shows high durability in all climates and requires minimal maintenance. Its superior stability ensures resistance to cracks and splinters, making it a long-lasting decking solution compared to standard materials. Combining the natural aesthetics of wood with outstanding performance, Accoya is the perfect choice for enhancing both indoor and outdoor spaces. Especially ideal for barefoot use, it offers a blend of beauty and function. Features PERFORMANCE A Lifetime of Experience Unlike traditional wooden decking, Accoya allows for comfortable barefoot use year-round. Its superior durability provides resistance against rot and insect attacks. Thanks to its remarkable stability, it minimizes the risk of cracking and deformation. Its long-lasting structure requires minimal upkeep and maintains its aesthetic appeal for years. Accoya brings together the natural look of wood with high performance for a reliable decking solution. RESULT Fits Any Design With minimal swelling, warping, or distortion, Accoya provides a safe and durable decking solution. Its superior stability ensures the deck maintains its shape and form over time. Hidden fasteners preserve the smooth surface of Accoya and enhance its seamless look. When left uncoated, it weathers naturally and blends beautifully with its environment. This makes it ideal for landscaped gardens and open spaces. SUSTAINAbILITY Unmatched Accoya’s long-lasting structure offers a reliable and durable wood solution that maintains performance for years. Its superior stability and resistance to rot ensure minimum maintenance. Its aesthetic value enhances architectural projects, while sustainable production makes it an eco-friendly alternative. Accoya’s natural beauty and strength provide long-term performance for façades and exteriors. This makes it an ideal choice for both visual appeal and environmental responsibility. Barefoot Friendly Comfort in Every Touch Stay Cool Under the Sun Walking comfort on decks depends on surface texture and heat retention. Accoya offers an ideal surface that maintains the natural, warm feel of wood without overheating, providing an exceptional barefoot experience. Heat retention on terraces and decks can be an issue, making some surfaces uncomfortable during summer. But thermal tests have shown that even under high temperatures, Accoya stays cooler than many other materials. Compared to standard deck materials, Accoya provides superior performance, allowing safe barefoot walking even in hot weather. Splinter-Free, Smooth Surface Accoya’s dimensional stability prevents boards from warping and splintering. This ensures a smooth, safe deck surface that remains comfortable for many years. By resisting splinters, Accoya ensures a pleasant barefoot experience. Deck Catalogue Guarantees Accoya offers long-lasting performance for decking, backed by a 50-year industry-leading warranty. With superior stability and durability, it provides a reliable solution with full protection throughout its lifespan. Ideal Decking Solution Accoya decking is highly resistant to rot and insect attacks. Its long-lasting structure requires minimal maintenance, preserving aesthetics and functionality for many years. Extremely Stable Accoya’s splinter- and crack-resistant structure is ideal for barefoot use. It maintains coolness in hot weather, offering a comfortable and safe decking alternative. Extremely Durable Accoya decking is 100% non-toxic and fully recyclable. With a low carbon footprint, it's an eco-friendly choice for sustainable structures. Sustainable Accoya Decking Your Ideal Decking Choice Accoya decking delivers high resistance against rot, cracks, and wear—even under extreme climates—ensuring long-term performance. Its durability means it rarely needs repair, repainting, or oiling, and can be easily cleaned with just water and a brush. Naturally weathering into an elegant silver-gray over time, FSC®-certified Accoya is made from sustainable wood, 100% non-toxic, and fully recyclable—making it an eco-friendly alternative. Contact Venlo City Hall A Pioneer of Cradle to Cradle The Venlo City Hall in the Netherlands is one of the leading projects applying Cradle to Cradle (C2C) design principles to the highest level. The building was designed to maximize environmental sustainability and optimize natural resource use. Accordingly, Accoya wood—known for its innovation, sustainability, and recyclability—was chosen as a material for the project. Accoya was used in the building’s decking, cladding, windows, and doors. This choice contributed to a structure with a long lifespan and minimal maintenance requirements, while also minimizing carbon footprint. The building's Cradle to Cradle Gold certification proves the circular economic model supported by its design. Free from toxins and fully recyclable, Accoya contributed to making Venlo City Hall a healthy, efficient, and ecological space. Why Choose Accoya? Inspired by Nature Accoya wood was selected as the primary material for the project “Understanding Plant Diversity” in the Botanic Garden of the University of Cambridge. Designed to inspire visitors and promote plant taxonomy, the project includes a 65-meter-long spiral walkway elevated at three different heights. This dynamic structure invites visitors to explore the Systematic Beds of the garden through an architecturally designed interpretation center. Accoya’s superior durability and sustainable features contribute both aesthetic appeal and functionality, offering a long-lasting outdoor solution. DECKING SIDING DOOR & WINDOWS INSPIRING PROJECTS