Sanding is the most difficult of the floor work. It is said that if you have sanded about 10000m2, then you can consider yourself a sanding specialist. I assure you that this rule does not always apply to everyone. This job requires logical thinking, good cognition, a precise eye and good machines. In particular, it requires long-term experience.
Woodengold recommends that you leave the care of both new and old floors to professionals with long-term work experience!