What are the reasons for grout cracking? Can you repair them?

There could be several factors that could lead to grout cracking. Some of them are:

  1. Incorrect installation
  2. Loose tiles
  3. A supple substrate
  4. Using of non-sanded grouts in wide grout joints
  5. Unfilled grout joints at the time of grout installation
  6. Lack of expansion joints

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