For example, take a family in which three people, two of them are working parents. They live a two -room apartment. If the owners want to purchase a floor covering as a laminate for an entrance hall for a period of at least 15 years, then they need to take a laminate of the 32 of class, since its service life is from 15 to 20 years. As for other rooms, you can take grade 31, a guarantee for which from 10 to 15 years.