That’s because we strive for continuous improvement in treating innovation, safety, and standards. And it’s why ProWood is embracing the recent ground contact standard changes set forth by the American Wood Protection Association (AWPA) in February of 2016.

Currently, homeowners and building professionals purchase treated lumber specified as “ground contact” for uses that will be in contact with the ground in order to prevent rot and decay. An example of this would be deck posts that are set in the ground. However, it’s also important to consider ground contact retention for the integrity of structures like decks and docks, and for the safety of those using them.

The new standards released by the AWPA recommend that current above ground treated lumber applications must now adhere to (UC4A) ground contact requirements when they’re:

  • difficult to maintain, repair or replace (such as deck joists or ledger boards) and critical to the performance and safety of the entire system/construction
  • installed less than six inches from the ground
  • at risk for poor air circulation
  • likely to have prolonged contact with vegetation or leaf litter
  • exposed to frequent moisture
  • used in tropical climates

Previously, deck components such as deck boards, joists and ledger boards were not required to be treated to ground contact retention. Now, ProWood treated lumber is available to customers with a full line of products treated to the ground contact (UC4A) standards including:

  • 5/4-in decking
  • Dimensional lumber
  • Plywood
  • Appearance grade boards

The new standards will eventually dictate building codes, so the transition to the new ground contact recommendations for ProWood treated lumber is imperative for code compliance, product reliability, and, above all, safety.

ProWood represents the highest of standards for treated lumber, and we are committed to offering the industry’s safest, most reliable ground contact treated lumber throughout our portfolio of ProWood Pressure-treated, ProWood DuraColor color-treated, and ProWood Kiln Dried After Treatment (KDAT) lumber.

Be sure to ask your local ProWood representatives about this transition. Do it once, and do it right with ProWood treated lumber.

For more information about the changes to treated lumber and the new ground contact standards, visit