Preserving More Than Just Wood.

Built to Last. Treated to Endure.

A Short History of Wood PreservationFor more than 100 years, builders have used pressure-treated wood to protect structures from rot, insects, moisture, and marine damage.

• Early 1900s: Logs and pilings floated in rivers and the ocean; saltwater naturally preserved wood before milling.

• 1930s–40s: CCA (Chromated Copper Arsenate) became the most widely used heavy-duty preservative for poles, pilings, and marine structures.

• 1951: Copper Naphthenate approved for ground contact and marine-grade protection.

• 1990s–2000s: ACQ and Copper Azole replaced CCA for most residential lumber-like decks and fencing.

• Today: CCA, Copper Naphthenate, Borate, and CA-C are used for different environments and applications.

Wolman® E Copper Azole treated lumber. 

What We Treat

Conrad Forest Products supplies long-lasting treated wood solutions for nearly every job:

• Decking, fencing, and outdoor lumber (CA-C)

• Large timbers, beams, and structural posts

• Utility poles, pilings, and marine-grade timbers (CCA and Copper Naphthenate)

• Saltwater and freshwater structures such as piers, docks, seawalls, and floating logs used historically in Hawaii

Each treatment is carefully matched to the environment—ground contact, freshwater, saltwater, or full marine immersion.

Why Treatment Matters

Pressure treatment provides essential protection:

• Prevents rot and decay

• Stops termites and insect damage

• Protects pilings from marine borers

• Reduces moisture and saltwater deterioration

• Extends the lifespan of structures dramatically

  

  Wolmanac® CCA Heavy Duty™ Treated wood.

  Why Builders Choose Conrad

  • Broad selection of treated lumber, poles, timbers, and piling

  • High, consistent treatment quality

  • Expert guidance on the right treatment for every project

  • Trusted for residential, commercial, industrial, and marine applications

  
  

  Built to Last. Treated to Endure.