A PEI rating is Porcelain Enamel Institute's system of grading tile on a 1 -5 scale of hardness which helps determine tile suitability for its intended installation which is typically flooring.
A PEI rating is Porcelain Enamel Institute's system of grading tile on a 1 -5 scale of hardness which helps determine tile suitability for its intended installation which is typically flooring.