Tar Kiln

From Ring of Brodgar
Tar Kiln
Tar Kiln.png
Vital statistics
Size 4.5 x 4.5
Skill(s) Required Pottery
Object(s) Required Clay x50, Stone x35
Required By Coal, Everglowing Ember, Tar
Repaired With Clay
Can be Lifted No
Go to Objects
Icon keyboard.pngBuild > Buildings & Construction > Furnaces & Fireplaces > Tar Kiln

The tar kiln is used to get coal from wood blocks or boards. It also produces Tar as a byproduct, which you can take out in a bucket or barrel.

How to Use

Fill it with blocks or boards, then light the tar kiln using a torch or other fire source. The tar kiln can hold 80 blocks or 40 boards, and it takes 83.3 RL Hours (1.2% per hour) to burn no matter how much wood is in it. Each block becomes 2 coal, one board equals 1,5 coal.

Use inspect to check %.

Icon keyboard.pngAdventure > Inspect


Tar Kiln Q =

Tar and Coal Q =

The color and amount of smoke produced varies.


  • Due to boards being usually higher quality than blocks, it is recommended to use them for making high Q coal.
  • Blocks are lower quality than boards, but they produce more tar.
  • When adding blocks/boards to the tar kiln, the quality of the blocks/boards will average after each addition. If you want to make high Q coal, avoid putting in any lower Q blocks or boards.
  • In World 10, it now takes about ~3.5(83.3 hours) days real-time to finish burning coal.
  • In World 10, the kiln must be at least half full to start.
  • Different types of wood yield different amounts of tar. Pine blocks yield the most tar, followed by other coniferous trees.
  • Tar kiln can keep a maximum amount of 10 liters of tar.
  • A full kiln of pine blocks yield nearly 20 liters of tar, so if you don't collect it halfway you'll lose half of the yield because the kiln is full.
  • It takes approx. 2 minutes and 45 seconds to produce 0,01l of tar from pine wood.
  • In World 11, higher Q tar kilns finish faster than lower Q kilns.