Each piece of ProWood® Professional Grade lumber carries an end tag which has essential information for any builder or do-it-yourselfer, including:

The preservative used
The appropriate end use (i.e., above ground or ground contact)
The quality standards it meets
Safe handling information

1.Description of use.
2.Warranty statement.
3.Code report for treatment.
4.Code for use/exposure category (see Description of Use).
5.Treatment authority.
6.Third party quality inspection (assures product has passed retention and penetration test).


Pro-Wood Builder Specifier Guide
Staining and Sealing
Pro-Wood use categories
Pro-Wood Difference
Maintenance Plan
Understand the End Tag

When starting a building project, it’s important to know how and where your treated lumber will be used. See the list of “Use Categories” below (as defined by AWPA). A brief description of the Use Categories is shown after the Use Code. Highlighted in bold are three of the most common residential uses for pressure treated lumber

UC1 Interior Dry

UC2 Interior Damp

UC3A Exterior Above Ground, Coated with Rapid Water Runoff

UC3B Exterior Above Ground, Uncoated or Poor Water Runoff

UC4A Ground Contact, General Use

UC4B Ground Contact, Heavy Duty

UC4C Ground Contact, Extreme Duty

UC5A Marine Use, Northern Waters (Salt or Brackish Water)

UC5B Marine Use, Central Waters (Salt or Brackish Water)

UC5C Marine Use, Southern Waters (Salt or Brackish Water)

UCFA Interior Above Ground Fire Protection

UCFB Exterior Above Ground Fire Protection
ProWood is the industry standard for treated lumber and outdoor products and features:
• The largest selection of treated products
• The latest advancements in treating technology
• A lifetime limited warranty against termites and rot