Miscellaneous
How hard is porcelain?
1
Answer
Both marble and porcelain are hard materials, but porcelain is rated on a PEI scale. Those tiles with a PEI (Porcelain Enamel Institute) hardness rating of 4 or 5 are good for home and business. A PEI rating of 3 is good for residential and only light commercial traffic.
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Points
15
Rating