Why Do Birch Logs Have Bark?
Birch logs naturally retain their bark after they have been cut and processed. While many people picture birch trees with striking white or silver bark, the logs used for firewood are usually cut from the thicker lower sections of mature trees, where the bark is naturally much darker, rougher and more textured.
During harvesting, splitting and kiln drying, much of the papery white outer bark also flakes away, leaving the darker bark that you commonly see on firewood.
There's no need to remove the bark before burning. Properly kiln dried birch bark burns perfectly well and can even help a fire catch more easily thanks to the natural oils it contains. It also helps protect the wood during storage and handling.