Which type of wood is generally preferred for outdoor decking?

Pressure-treated lumber is generally preferred for outdoor decking due to its durability and resistance to moisture, insects, and decay. This type of lumber undergoes a chemical treatment process that enhances its ability to withstand the harsh outdoor environment, making it ideal for applications such as decks, where exposure to the elements is a concern.

In contrast, oak, although a strong hardwood, is not commonly used for decking because it is more susceptible to moisture-related issues and requires more maintenance when exposed to outdoor conditions. Birch is also less suitable for decking as it is a softer wood that tends to warp and splinter more easily when used outdoors. Pine, while sometimes used for decking, generally lacks the necessary treatment to endure outdoor exposure effectively unless it is pressure-treated. Therefore, pressure-treated lumber stands out as the best choice for creating a durable and long-lasting decking solution.