Tile is rated using a grading system and is solely based on the tile’s durability and resistance to surface damage. An easy way to think of it is that a rating or grade 1 means that the tile is more likely to be prone to scratches and or dents where as a grade 5 is considered a more durable tile and resistant to surface damage.
Here is a breakdown of all 5 rating levels and their suitable applications:
Grade 1
No foot traffic. These tiles should be used for walls only.
Grade 2
Light traffic. Good for interior residential and commercial walls. These are for areas where little abrasion occurs, like bathrooms!
Grade 3
Light to moderate traffic. Use these in residential settings with normal foot traffic. They are also great for countertops and walls.
Grade 4
Moderate to heavy traffic. These tiles are acceptable for all home spaces, in addition to medium commercial spaces.
Grade 5
Heavy to extra heavy foot traffic. Approved tile for all residential applications and heavy commercial spaces.