WWPI Members

WWPI members are dedicated to providing quality preservative-treated products that meet all building code and treating standards while using EPA registered preservatives that are approved by the American Wood Protection Association (AWPA).

WWPI was originally formed in 1947 by a group of treating companies under the name Western Wood Preserving Operators Association. The companies agreed to join together for the “promotion of wood preservation by pressure treatment, the standardization of specifications for various methods and purposes of wood preservations … and the development and promotion of the use of such techniques.”

Over the seven decades of service to the industry, the membership in WWPI expanded beyond the treating companies. Today, WWPI membership includes those businesses that are directly affiliated or provide a service to the preserved wood industry, from preservative makers and wood products companies to consultants, equipment suppliers and remediation companies .

There are three levels of membership: Treater Members, Associate Members and Supporting Members. To learn more about each respective member, click on the link to view their website, where available.

Treater Members

Allweather Wood, Washougal, WA
AmeriTies West, LLC, The Dalles, OR
Arizona Log & Timberworks, Eager, AZ
Bell Lumber & Pole Company, New Brighton, MN
Brisco Wood Preservers Ltd., Brisco, BC
Brooks Manufacturing Co., Bellingham, WA
Chemco, Inc., Ferndale, WA
Conrad Forest Products, North Bend, OR
Doman Building Materials Group, Ltd.
- California Cascade Industries, Fontana, CA
- Oregon Cascade Industries, Junction City, OR

- Honsador, Hawaii (multiple locations)
Frontier Posts, Stevensville, MT
Hughes Brothers, Inc., Seward, NB
Idaho Wood Preserving - Parma Post & Pole, Parma, ID
Koppers, Inc., Denver, CO
Marks-Miller Post & Pole, Inc, Clancy, MT
Pacific States Treating, Weed, CA
Permapost Products, Hillsboro, OR
Princeton Wood Preservers, Ltd., Princeton, BC
Royal Pacific Industries, McMinnville, OR
Stella-Jones, Inc., New Westminster, B.C.
Superior Wood Treating, Sumner, WA
Taiga Exterior Wood, Inc., Washougal, WA
Thunderbolt Wood Treating, Riverbank, CA
Western Wood Preserving Co., Sumner, WA
Wheeler Lumber, LLC, Whitewood, SD

Associate Members

Preservative, Fire Retardant Manufacturers
Arxada, Smyrna, GA
Kop-Coat Protection Products, Pittsburgh, PA
Koppers Performance Chemicals, Griffin, GA
Nisus Corporation, Rockford, TN
Rain Carbon, Inc., Hamilton, ONT
Trans Western Chemicals, Fullerton, CA
U-C Coatings, Seattle, WA
U.S. Borax | Rio Tinto, Chicago, IL
Viance, LLC, Charlotte, NC

Wood Manufacturers, Distributors
Aspire Industries Ltd., Burns Lake, BC
Boise Cascade, Boise, ID
Bridgewell Resources, LLC, Tigard, OR
Hampton Lumber, Portland, OR
Sierra Pacific Industries, Anderson, CA
Trans Canada Forest Products, Henryville, QUE
Weekes Forest Products, Inc., Lake Oswego, OR
Western Forest Products, Inc., Vancouver, BC
Weyerhaeuser Co., Ltd., Seattle, WA

Supporting Members

Analytical Laboratory & Consultants, Eugene, OR
AquAeTer, Centennial, CO
EHS Support, Multiple locations
EKI Environment & Water, Inc., Burlingame, CA
Maul Foster & Alongi, Vancouver, WA
Pacific Wood Services, Troutdale, OR
Stephen Smith Consulting, Helena, MT
Stoel Rives LLP, Portland, OR
Stults Consulting, Oswego, IL
TB Consulting, LLC, Grangeville, ID
Webb Consultants, Inc., Valencia, PA

Equipment, Supplies
American Wood Technology, Jefferson, GA
Embry Automation & Controls, Evansville, IN
Hitachi High Tech, Lago Vista, TX
IWT, LLC, Vejle, Denmark
Marine Fenders International, Inc., Wilmington, CA
RJH Enterprises, Inc, Corvallis, OR

Bode Inspection, Inc., Beaverton, OR
Timber Products Inspection, Inc., Portland, OR
Western Wood Services - a div. of SPIB, Pensacola, FL
Wood Quality Control, Madison, MS

The Bayne Company, Spokane, WA
Genics, Acheson, AB
Osmose Utilities Services, Inc., Peachtree City, GA
Poles, Inc., Manitou Springs, CO
SmartFume Co., Woodland, CA

Leavitt's Freight Service, Inc., Springfield, OR

Users, Others
Gemini Forest Products, Stockton, CA
Hexion, Inc., Springfield, OR
Western Wood Structures, Tualatin, OR