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What is an End Tag?

Posted 21 February 2017 9:24 PM by Jase DeBoer

Perhaps you've noticed that little piece of paper on the end of your lumber. Well, that’s an end tag, and it contains a great deal of information about your lumber. If you’ve ever been curious about what information can be found on the end tag… you’re in the right place.

ProWood Understanding the End Tag

An end tag is an indicator (or tag) stapled to the end of a piece of lumber. The purpose of the end tag is to provide information to the customer or building professional regarding various aspects of the wood. The tag can vary slightly between brands or treating facilities, but generally it will note some common features such as brand, intended use for that the wood, and the preservative and treatment method used.

One of the most important elements of the ProWood® end tag is the bar above our logo. This bar will state “FOR LIMITED ABOVE GROUND USES” or “FOR GROUND CONTACT/GENERAL USE.” A tag that states the wood is “for ground contact” doesn’t just mean the wood is used only when in contact with the ground. The wood might also be necessary where there is limited ventilation or frequent exposure to moisture.
It’s important to understand which type of treatment standard is right for your project. To learn more, visit As for the other elements of our end tag, let’s get to it:

ProWood 2017 End Tag Front & Back Description and Explanation

1. Intended Use Statement: Limited Above Ground vs. Ground Contact/General Use 

2. Warranty statement: ProWood is backed by a Lifetime Limited Warranty 

3. The Double Box**: This is required for building code compliance. The left side of the box indicates the treatment standard authority. The right side of the box indicates the third-party inspection agency. The combination of these two elements indicates building code compliance. 

4. Scientific Certification Systems, Inc. (SCS) seal: ProWood is “Environmentally Preferable” in accordance with SCS Certification, a neutral third party. 

5. Code for use/exposure category: This will state UC3A, UC4B or UC3B. These provide more detail about treatment level and intended use. 

6. ICC-ES Report Number 

7. Preservative System: ProWood is treated using MCA (Micronized Copper Azole) 

8. Details on where to find safe handling, fastener and warranty information 

**Note – on ProWood end tags, if the double box is shaded green, it is another indication that the lumber is treated to ground contact/general use retention. 

ProWood is the go-to choice in treated lumber, and it’s our goal to ensure you have the information you need to make the right decision for your project. When it comes to choosing the right pressure-treated lumber… Never Settle. 

For more information, check out Understanding The End Tag on our website. Or for an independent perspective, check out the USDA's Forest Products Laboratory TechLine on new wood treatments.


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