Superior Sustainability

Accoya is sustainably-sourced timber treated by nontoxic acetylation. This modification provides dimensional stability and durability that exceeds the best hardwoods.

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Natural Wood Made Perfect for Coating

Delta has created high-performing Accoya products with rich texture and color inspired by the natural world. Accoya is thoroughly tested for performance and paint retention.

Key Features & Benefits


Accoya products perform in any application: exterior siding, decking, soffits, and interiors. This natural wood sequesters and locks carbon during its 70+ year expected lifetime.

  • Outstanding durability & dimensional stability
  • Barrier to insects
  • Naturally insulating
  • Non-toxic and recyclable
More Benefits of Accoya®


Responsible Sourcing

  • 100% of Accoya® is FSC® certified
  • 100% of Accoya® key materials providers are audited to confirm sustainable practices
  • Sourced from fast-growing timber ready to harvest in 28 years
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Above Ground

50 Years

Installed according to our recommendations

In Ground or Fresh Water

25 Years

Decking & other applications with ground contact


Accoya Siding

  • Milled > Coated > Finished at Delta Millworks
  • Delivered with 2-3 month lead times
  • WUI Compliant with SFM 12-7A-1 Fire Rating
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The Sustainable Choice

Accoya Decking

  • Low-maintenance natural wood material
  • Durability & decay resistance exceeds hardwoods
  • Barefoot friendly: less thermal gain compared to other materials
  • Replaces tropical hardwoods such as Ipe that are driving deforestation
Accoya Decking Benefits

Material Health

Accoya® Re-Awarded Cradle-to-Cradle Gold Certification

Accoya® was granted Cradle-to-Cradle Gold certification, and was awarded Platinum for Material Health.

Cradle to Cradle Certified

Cradle-to-Cradle is a globally recognized measure of safer, more sustainable products made for the circular economy. It ensures products are made using chemicals that are as safe as possible for humans and the environment.

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Featured Accoya® Projects

Rivers Marie Winery

Accoya Rivers Marie Winery

Featured Accoya® Projects

Orchard Lane

Featured Accoya® Projects

235 Valencia

Featured Accoya® Projects

Napa Valley Guesthouse

Featured Accoya® Projects

Holladay House

Featured Accoya® Projects

Studio City Oasis

Featured Accoya® Projects

Whalen Primary Residence

Featured Accoya® Projects

Loghaven Gateway

Featured Accoya® Projects

Starwood Firehouse

Featured Accoya® Projects

Edgewater Public Market

Featured Accoya® Projects

Studio City Residence

Featured Accoya® Projects

Montana Residence

Featured Accoya® Projects

Vichy Pool House

Featured Accoya® Projects

Sonoma Residence

Featured Accoya® Projects

Sleeve House

Featured Accoya® Projects

Art Barn

Featured Accoya® Projects

Kiva Residence

Featured Accoya® Projects

Whalen Spec Residence