From Liquipedia Warcraft Wiki

Lumber is the secondary resource in warcraft 3. It is used to train units, build buildings, research upgrades and buy items.

Lumber Income[edit]

  • Trees
  • Selling items
  • Pillage
  • Unsommuning buildings
  • Bundle of Lumber (a power up similar to tomes, that gives lumber to the player)
  • Lumber from allies

Lumber Usage[edit]