Boards are RefinedItems crafted with 4 Logs used in the construction of various items and structures. A Science Machine is required to prototype them. Boards are also highly flammable and can be used as Fuel. Boards can be directly used to repair Boats.
Due to the fact that 4 Logs refine into 1 Board, and Boards stack up to 10 (40 logs), it is more efficient to carry a single stack of Boards than two stacks of 20 Logs. One can also store more wood in a container if they convert them to Boards. It must be noted, however, that Boards cannot be used in recipes that require logs, such as Campfires.