Why do Quartz Slab Cracks or Breaks?

Why Do Quartz Slab Cracks Or Breaks? - Portland - Quartz, Countertops and Installations

Why do Quartz Slab Cracks or Breaks?

Quartz Cracks

We have been receiving frequent calls about repairing quartz slabs that have cracked along the Inside Corners on L-Shapes once installed on a kitchen countertop. This normally happens because the fabricator did not give a minimum radius and distance when cutting the slab. For example, if the L-Shape slab piece has a radius of less than 10 mm or about less than 3/8 inch as required by the manufacturer, then the slab is prone to crack at this location. This is due to the tension concentrated at a point.

How to repair them?

Normally, a crack like the one in the picture can be filled with a special super thin glue to help prevent the crack from opening and growing. However, it can still grow. Cracks on Engineered Stone are a bit tricky to repair due to their man-made structure. We haven’t been able to repair them as easily as granite. Quartz cracks will “walk” over time or the crack will keep growing until the slab is broken. Granite, on the other hand, does not “walk” and the crack will not grow over time.

Causes of the Problem

When the slab cracks at the radius and the radius is less than 3/8 inch, it is most likely a fabricator error. Not following manufacturer recommendations also voids any claims to their warranties.

To prevent cracks in quartz slabs, it is crucial for fabricators to adhere to the manufacturer’s guidelines and provide a minimum radius and distance when cutting the slab. This helps distribute tension and minimize the risk of cracks forming along inside corners. By following these recommendations, homeowners can ensure the longevity and durability of their quartz countertops.