Preserved wood treating companies
WWPI Treaters are the core members of the Institute. Located throughout the 17 Western states and in two Canadian provinces, these treating companies produce a variety of preservative-treated wood products, from utility poles and marine pilings to sawn lumber, timbers and glu-lam beams.
There are two levels of Treater membership: Full Treater and Limited Treater. Full Treater membership is open to any company producing pressure-treated wood products with more than one pressure cylinder and more than one type of treatment. Limited Treater membership if for companies with a single pressure cylinder and a single type of treatment.
For information on Treater membership, contact WWPI Executive Director Ryan Pessah at 360-693-9958. To review the preservatives used by Treater members, download the Sources of Supply publication.
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. – Stella-Jones, 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
Hoover Treated Wood Products, Thomson, GA
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