Make sure your contractor has specific experience with the material your floor is made out of. Some hardwood flooring materials are made out of a mixture of hardwood veneers and synthetic fibers. Some of the solvents used to repair wood flooring may not work very well on engineered wood flooring like this. You should make sure your contractor understands how to deal with everything from engineered wood flooring to regular wood flooring.

Try to find a contractor with references. This work can sometimes be very labor-intensive and can take a long time to complete. The problem with this is that there is a potential for you to hire an unscrupulous contractor. This becomes even more possible when you know very little about the contractor. If you look at past references or online reviews, then you will be able to make a much more informed decision when hiring a contractor.

You should only hire a contractor with insurance. If the contractor breaks something or harms your flooring during the project, you don't want to be liable for the resulting financial damages. Hiring an insured contractor will protect you against things like this.