What are the different types of pressure treated wood?
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).
What is the best type of pressure treated lumber?
The best pressure treated wood for decks is Select, #1 or #2 grade wood. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. Decking materials such as 2×6 and 5/4×6 frequently are of better-looking #1 and #2 lumber.
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.
Is brown pressure treated wood better than Green?
Although it is a more expensive option, wood that has been pressure–treated using micronized copper azole (MCA), which is a darker brown in colour, is less prone to off-gassing, and the preservative is less likely to wash off. As a result, it protects and retains its colour for longer.