Are there different types of treated lumber?
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Hereof, what are the different types of treated lumber?
There are many types of treated lumber. There are three main families of treated lumber used in construction: Borate, Alkaline Copper Quat (ACQ) and other rot-resistant treatments, and non-combustible (Non-Com). See the complete list under Additional Information.
Furthermore, what is the difference between 1 and 2 pressure treated lumber? Typically wood that is two or more inches thick is graded only for strength, denoted by #1, #2 and so on. And because stronger lumber has fewer and smaller knots, it's typically more attractive. So the general rule of thumb for lumber grades is this: the lower the number, the more strength and better appearance.
Similarly, you may ask, is all pressure treated wood the same?
Until 2004, pressure-treated wood for residential use was preserved with chromate copper arsenate (CCA), and the level of treatment was generally the same for all lumber. Retention level measures how much of the preservative is retained in the wood after the pressure treatment ends.
What is in pressure treated lumber?
Pressure-treated lumber is wood that has been immersed in a liquid preservative and placed in a pressure chamber. The most common chemical used to treat lumber used to be chromated copper arsenate, or CCA.