Cork Tiles: Cork tiles are another alternative to hardwood floors. Cork is made of water-resistant cells that separate the outer bark of certain trees (like cork oak) from the delicate interior. Once a tree is 25 years old, the cork bark can be stripped every 8 to 14 years thereafter. So the same tree can provide multiple harvests, which is much better for the environment than chopping down an entire tree for one harvest of hardwood flooring. Cork tiles can give floors a unique, casual look with their attractive texture and interesting shape options, such as triangle and hexagon cuts.