Let's look at the Copper Azole formulation that Viance supplies wood treaters in the United States.
Please note:
- The American Wood Protection Association sets the minimum standards for preservatives used in treated lumber for the various use categories listed below.
- Preservative formulations require different minimum retentions to extend the life of wood and for effective protection against termites and fungal decay.
- End tags on lumber designate the preservative code, the use cateogory, the retention level, the third party inspection agency and the treating location.
![Ab out Copper Azole from Viance](https://d2307sosxvjzpr.cloudfront.net/uploads/general-images/About-Copper-Azole.png)
![AWPA Use Categories](https://d2307sosxvjzpr.cloudfront.net/uploads/general-images/AWPA-categories.png)
![Viance treated lumber end tag CA-C](https://d2307sosxvjzpr.cloudfront.net/uploads/general-images/_blogListingThumbnail/EndTagExample-web-news.png)
![AWPA infographic on above ground and ground contact use](https://d2307sosxvjzpr.cloudfront.net/uploads/general-images/AWPA-official-AG-and-GC-diagram.png)