Pressure Treated Lumber has been specifically engineered to use on projects that would be completely exposed to the elements. These kinds of wood start with one of the SPF varieties or other kinds of softwoods. The sealant formulas would be pressure-applied on the surface. It would seep into the core of the wood. The formula has helped protect the wood. However, it proved quite toxic for those who worked on it along with the animals who were exposed to the final product. As arsenic has been used as the base of the first formulas, dogs who have chewed on it have been known to experience arsenic poisoning. Due to this, manufacturers have started using ACQ lumber. Even though, it has its own shares of problems, it did not have problems with respect to toxicity.
Purchasing pressure-treated lumber
You should not be surprised if the Rough Cedar Lumber arriving at your local home center has been almost dripping wet. The procedure dies this to the wood. You would find that the outer edges have been actually slightly dry. It would be slightly warp from the outside. Due to lumber that has been warped, you may not gain the requisite amount. As a result, all manufacturers would provide the wood to their distributors at the earliest. It would help them sell the wood prior to it drying completely or unevenly.
In event of the wood being wet, it would be similar to a sponge. It would soak up as much liquid as it could. With the wood drying, it would shrink, even though not significantly. As you would not have ample of time to wait and see the extent of warping, you would be required to inspect the long edges and search for blemishes and other visible weak spots. Moreover, you should check the end grains to search for signs for those crossing the narrow span of the board.
Installation of the lumber
When you have been building outdoor projects, you would need every board closely knitted against each other. It should be as tightly butted as possible. With the wood drying and beginning to shrink, you would automatically notice the gaps appearing on the boards. In order to resist cupping, you would be required to position any of the boards with their end grains in the arc shape. It would help the centre of the board’s arc end grain to point upward. When trying to minimize the bowing, ensure that you put one deck screw in the centre of the board.