Being that this blog is here to provide information on Pergolas, Decks, Timber and outdoor entertaining using timber, it makes sense that we cover the types of timber that we sell at Softwoods and give you the reader as much information as possible about them, so that you can make an educated decision about what you are buying. This particular article covers CCA Treated Pine. My primary source in researching this article is the CSIRO, where you will find an exhaustive and likely more coherent outline than mine!
At Softwoods, most of the structural timber that we sell is plantation grown Radiata Pine. In order to prevent movement and rot and to deter pests such as termites and borers, the timber is put through a treatment process once it has been cut and before it is packed and distributed. This process, involves subjecting the cut timber to a solution of chemicals via a vacuum or pressure system which penetrates the timber with the solution and bonds chemically to the timber providing a defense against weathering, movement and pests. The timber is then kiln dried to lock in the treatment solution and remove any excess moisture (which if left wet will result in unpredictable movement)