Should a newly installed granite counter top with hairline crack be repaired or it must replaced?

It depends on a few factors, such as the size and location of the crack, as well as the type of granite.

Size and location of crack

- For small hairline cracks that do not affect the structural integrity of the countertop or pose a safety hazard, repair is usually an acceptable option.

- Cracks that are larger or in a more visible location may require replacement.

Type of granite

- Some granite types, such as darker or more porous granites, are more prone to cracking than others. If the countertop is made of a particularly delicate type of granite, repair may not be as effective and replacement may be necessary.

Consult with a professional

- It's always best to consult with a qualified countertop repair professional or the countertop manufacturer to assess the damage and recommend the best course of action. They can evaluate the specific circumstances and provide the most accurate advice on whether the countertop can be repaired effectively or should be replaced.