Teak logs are obtained through the Woodcutting skill by cutting teak trees with a Woodcutting level of 35, yielding 85 experience when cut. These trees can be found in Tai Bwo Wannai, Uzer, Kharazi Jungle, Ape Atoll, in the woodland south and west of Castle Wars, islands north-east of Mos Le’Harmless, and in Miscellania (although you cannot chop and keep the logs here).
Perhaps the most convenient and unrestricted place to obtain teak is a single tree south-west of Castle Wars, accessible by a ring of dueling. If you have access to the fairy rings, bkp will drop you slightly closer to the tree spot. Just walk west of the fairy ring.
While players can burn these logs with the Firemaking skill, they are mainly used in Construction. Members can bring teak logs to the sawmill north-east of Varrock to make teak planks at a cost of 500 coins each. Alternatively, the Lunar spell Plank Make can allow players to convert them to planks at a lower cost, but at the expense of runes.
These logs can be burned starting at level 35 Firemaking for 105 experience each.
There are several ways to create teak planks; one method is outlined below.