When purchasing a hardwood floor, lots of attention is paid to what kind of floor materials, color, surface finish and a number of other facets of hardwood floors and their effect on your home. Almost no instructions are given on how to correctly care for your hardwood floors as soon as they are installed. Hardwood floors are protected with a polyurethane sealant which gives wood floors their shine, protection and overall longevity. The finish of the floor usually will last around 3 years, At some point, the floors are more likely to dull. The reason being very small elements are constantly being ground into the finish through everyday use.