Is Granite Heavier Than Quartz? Structural Considerations

Heavyweights

Surprisingly, Granite and Quartz weigh almost the same: roughly 18-20 lbs per square foot for 3cm thickness.

Structural Needs

Standard kitchen cabinets are designed to hold this weight. However, if you have a large overhang (island breakfast bar) over 10 inches, both materials require steel support brackets. The danger isn't the cabinets crushing; it's the stone snapping under its own weight if unsupported.