Undermount sinks are appropriate for stone kitchen countertops because it gives the appearance of a more spacious counter, while making maintenance and cleaning easier too. However, the biggest concern with these sinks are the possibilities of damage and leaks due to tremendous strain from gravity. But with proper installation, gravity is not an issue.
The best method is to attach the sink to the stone counter’s underside using brass blind anchors, bound to the stone using high-strength epoxy. Before attaching the sink though, thoroughly clean the stone underside from dust. Dust will cause the epoxy to fail from adhering.
Another method is by using rails which attach to the cabinet, not to the stone. This makes the stone top stress-free from carrying the sink. This method is ideal for heavy-material sinks such as cast-iron, and composite sinks.
These methods will guarantee undermount sinks are secure without possible damage and leaks.
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