In case of stripping it is not necessary to grind the floor before applying a new treatment.
Two test can easily be performed to detect the presence of edges between tiles or tile floors :
- The coin test(or marble test) consists of rolling a coin or marble on the floor. If it doesn’t meet an edge, it will continue to roll.
- The test with a metal stick consists of placing a ruler on the floor. If it is perfectly stable, the floor is flat. If it can move or vibrate a little, there are edges between the tiles.
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