Marble countertops can crack due to several factors. One significant factor is excessive force or weight placed on the surface, such as dropping heavy objects or standing on the countertop. Additionally, impacts from a hard, sharp object can create cracks.
Temperature fluctuations can also contribute to cracking. Rapid changes in temperature, especially near heat sources, can cause marble to expand and contract, potentially leading to stress fractures.
Weak or inadequate support beneath the countertop, like insufficient or improperly placed brackets or subpar installation, can also result in cracks over time.