Treated hardwood is available from Creative Timbers in a range of sizes and lengths to suit almost any application. Treated hardwood is commonly used in external applications where durability and longevity is needed. The main sources are blackbutt, Queensland spotted gum and ironbark. Standard treatment is ACQ (Alkaline, Copper, Quaternary) treated to H4. Available in standard range of structural grading F14, F17 ,F22 as well as appearance grade. Some sizes can be supplied in F27, Please make a note in the comments section if you require this.