Undermount vs. Top-Mount Sinks With Stone Countertops
Published •5 min read
With stone countertops, most kitchens use an undermount sink: it's mounted under the stone, so crumbs and water wipe straight into the bowl and the polished stone edge shows around the opening. A top-mount (drop-in) sink sits on top of the stone with a rim; it's simpler to replace and can suit some sink materials. A farmhouse (apron-front) sink needs its own cabinet and a cut planned around its front.
Side by Side
| Factor | Undermount | Top-mount (drop-in) | Farmhouse |
|---|---|---|---|
| Cleaning | Wipe straight into the sink | Rim catches crumbs and grime | Wipe into the sink; apron front exposed |
| Look | Clean, seamless | Visible rim | Statement front |
| Stone edge at opening | Fabricated and polished | Hidden under the rim | Fabricated around the sink |
| Support | Clips or brackets plus sound cabinet | Rim rests on the stone | Supported in a dedicated cabinet |
| Replacing later | Harder; must fit the cutout | Easier | Harder; cabinet and stone fit the sink |
What to Decide Before Templating
- The exact sink model, or its cutout template, on site for the template visit.
- The faucet model and number of holes, and whether it mounts on the stone or the sink deck.
- Reveal style for undermount sinks (how much of the sink rim shows), if your fabricator offers options.
- For farmhouse sinks, the sink installed or the exact dimensions known before templating.
See countertop templating and how to prepare for countertop installation.
Support and the Sink Cabinet
An undermount sink is held to the stone, and a loaded sink is heavy. The sink base cabinet must be sound and level, and the sink fastened according to the fabricator's and sink manufacturer's instructions. Water-damaged sink bases should be fixed before new stone goes in. See cabinet requirements for stone countertops.
Frequently Asked Questions
Is an undermount sink better with granite or quartz?
It's the most common choice with stone because it's easier to clean and shows the polished stone edge. A top-mount sink is simpler to replace later.
Can I reuse my old sink with new countertops?
Often, if it's in good condition and the model or cutout template is available for the template visit. Older drop-in sinks can sometimes be undermounted if their design allows; ask your fabricator.
When does the sink need to be on site?
At the template visit, or at least its exact model and cutout template, so the opening can be cut correctly.
Planning New Countertops? Get a Quote
Mega Solutions installs granite, quartz, quartzite and marble countertops and cabinets across metro Atlanta. Request a quote and tell us which sink you're planning.
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