ACCOYA
exterior cladding :: interior cladding :: decking
PRODUCTS
CHARRED
NON-CHARRED
ABOUT ACCOYA
Accoya® is wood, but not as you know it. It is modified timber in which a process called acetylation, a cutting-edge patented technology, enables it to resist rot, defy the elements and stay strong for decades. Guaranteed for 50 years above ground and 25 years in ground or freshwater, its performance and properties are remarkable. From joinery for the home to bridges submerged in water, Accoya wood is a leading material that stands up to every application challenge – decking, cladding and more.
Shou sugi ban Accoya® is the combination of high-performance modified wood and an award-winning charred technique. Inspired by an ancient Japanese process that dates back to the 1700s, shou sugi ban enhances the exterior performance and aesthetic value of natural wood products. Due to the enhanced durability of Accoya®, a dense outer char layer allows the wood to seamlessly transition to a beautiful weathered look. All of our CHARRED shou sugi ban Accoya® products are FSC certified and come with a 50-year warranty on the wood when used above ground; 25-year warranty when used at/below ground level.
MODIFICATION PROCESS
1. Wood is Sourced
Accoya sources sustainable, plantation grown Radiata Pine.
2. Raw wood reacts with acetic anhydride.
Naturally occurring free hydroxyl groups are exposed to acetic anhydride (a byproduct of acetic acid) and the molecular structure is changed.
3. Free hydroxyl groups transform to acetyl groups.
The ability of the wood to absorb water is greatly reduced, and the wood is now more dimensionally stable and durable.
4. The resulting acetic anhydride is recycled.
Acetic anhydride comes from acetic acid (vinegar in a dilute form), and releases no toxins into the air.

NOTE: STICKER STAINS

Sticker stains are caused by separating planks with sticks (or ‘stickers’)
during the process of acetylation.
For Accoya® designs finished with lighter, transparent top coats, such as MAHO (shown) and PALAWAN, these sticker stains will be visible on day 1. After about 2 months of weathering, the visual contrast will fade and be less noticeable.
ACCOYA BENEFITS

Dimensional Stability.
Swelling and Shrinkage Reduced by 75% or More

Insect Barrier.
Indigestible to a wide range of insects, including termites

Outstanding Durability.
50 year above ground warranty; 25 year in ground/freshwater warranty

From Sustainable Sources.
Sourced from FSC and other regionally certified woods.

Non-toxic and Recyclable.
May be safely reused,
recycled and incinerated.

Naturally Insulating.
Ideal for applications where energy conservation is important.
RELATED PROJECTS

Green Mountain Residence :: NIGIRI Shou Sugi Ban Charred Accoya

KIPP DC High School :: AMITY European White Oak & Custom Accoya

Sonoma Farm :: Custom Accoya + AMITY European White Oak

Daring Prairie :: SAMITTO and MATSU shou sugi ban charred Accoya

Sunset Hill :: NIGIRI and YOSHIMI shou sugi ban charred Accoya

Hemlock Residence :: YOSHIMI and NIGIRI shou sugi ban charred Accoya exterior cladding

Tellagansett :: MATSU Shou Sugi Ban Charred Accoya® and HOWAITO Shou Sugi Ban Charred Cypress

Saltonstall Foundation for the Arts :: Custom Shou Sugi Ban Charred Cypress and MATSU Shou Sugi Ban Charred Accoya®

Two Rivers Middle School :: AMITY European White Oak and Custom Accoya®

White Stone Residence :: NIGIRI Charred Accoya® and MONOGATARI 2.0 Shou Sugi Ban Charred Cypress

Six Square House :: IKIGAI Charred FSC-Certified Accoya® Wood

Boland Road Residence :: YOSHIMI ACCOYA® SHOU SUGI BAN

Gallery House :: NIGIRI ACCOYA® SHOU SUGI BAN

High Desert Retreat :: YOSHIMI Charred Accoya® wood

Artists Studio :: MATSU shou sugi ban charred Accoya®

Wayzata Residence :: NIGIRI shou sugi ban Accoya®

Lakeshore Drive Residence :: NIGIRI shou sugi ban charred Accoya®
