It is one of the most popular types of wood: oak. It’s strong, has a warm color and a striking flame pattern. In terms of durability, it’s in the middle category: class 3. This means that the wood will remain good for 10 to 15 years. Fortunately, there is an easy way to increase it’s durability: by treating it with oil. As a result, the moisture penetrates less quickly and the lifespan is considerably extended.