How many inches should countertops generally not be cantilevered without support?

Countertops should generally not be cantilevered beyond 12 inches without support due to structural integrity and safety concerns. When countertops extend too far without proper support, they can become unstable and prone to bending, cracking, or breaking, especially under weight or stress from objects placed on them.

A cantilevered countertop involves a portion that extends out without being fully supported underneath. The 12-inch guideline is based on common practices in the construction and design industries, which aim to maintain a balance between aesthetics and functionality. This standard helps ensure that the countertop can accommodate typical loads while minimizing the risk of damage or failure.

For reference, shorter cantilevers, like those below the recommended limit, are typically more stable and can better withstand the forces applied to them. However, extending beyond this threshold without additional bracing or support systems may lead to an increased risk of structural failure or damage.