Minecraft wiki entry for Things_not_to_do, associated text: Although wood is flammable, it has a decent blast resistance and is efficient to collect in large quantities. A stack of wood blocks can be harvested at the same time as a stack of cobblestone, but yields four times as many blocks when crafted into wooden planks. For large constructions, such as mob traps, wood planks are a good choice. Wooden roofing may be easy and look nice, but it is vulnerable to being set on fire by lightning. Either the player should make the roof in a fireproof material or have a fireproof layer beneath to limit the spread of fire. In 1.17, a lightning rod can avoid this problem.