Difference Between Inset, Drop-on Sinks and Undermount

Choosing the correct sink for your needs is very important.

Undermount Sinks

Distinctive Features:

The edge lip of the sink is mounted below a solid surface countertop, so the sink effectively hangs underneath the counter, as opposed to sitting on top of it; creates a continuous flow from countertop in to sink.

Countertop Compatibility:

Best suited for solid surface countertop materials like granite, soapstone, marble, or concrete. NOT well suited for laminate or tile counters, which have too many weak points along seams and grout lines to support the weight of the sink.

Pros:

Wipe food scraps straight into the sink (no exposed rim to catch crumbs and dirt); reclaim up to half a square foot of counter space; attractive, minimalist look, easy to clean.

Installation:

Proper installation and sealing is crucial to prevent leakage and to make sure the sink is properly supported. (A full sink of dishes gets very heavy. You don't want the sink pulling apart from the underside of your countertop and crashing to the floor.) Undermount sinks are typically attached with a two-part epoxy adhesive and sealed with silicone caulking around the perimeter. Make sure to get a professional or someone who knows what they're doing. Most professionals can install an undermount kitchen sink in 30 minutes or less.

Inset Sinks or Drop-in Sinks

Distinctive Features:

These sinks "drop" into a hole cut out of the countertop, with the sink rim or lip resting on the top of the countertop. Faucet mounts directly on a sink ledge along the back edge of the sink.

Countertop Compatibility:

Compatible with all types of countertops, including laminate.

Pros:

Cheap, easy to install, available in most materials, most commonly stainless steel but also fireclay, composite, solid surface, acrylic, and cast iron.

Installation:

Installation is very simple if there is a pre-cut hole in the countertop. Clamps beneath the countertop keep the sink secure, while caulking around the rim provides a water seal.

Drop-On Sinks

Distinctive Features:

With a drop-on sink, the sink unit itself replaces the counter top.

Countertop Compatibility:

The sink unit itself replaces the counter top.

Pros:

Cheap, easy to install, available in most materials, most commonly stainless steel but also fireclay, composite, solid surface, acrylic, and cast iron.