Cork is the outer bark of the cork oak tree. One of the unique characteristics of cork is that its bark can be stripped away without harming the tree. This makes cork a renewable resource.
The first stripping occurs after approximately 20 years after the cork oak sapling has been planted. Then the bark is harvested approximately every nine to ten years until the tree reaches 200 years old.
Cork flooring is made from the bark, grinded, processed and baked in a kiln in the form of sheets. It is then cut into tiles which are used as flooring.