How to choose the right undermount basin

Undermount basins are fixed to the underside of the benchtop, so the cut edge of the stone or solid surface is visible at the basin opening rather than a ceramic rim. This gives the cleanest, most seamless look of any installation type, and makes wiping water directly off the benchtop into the basin much easier since there's no raised lip to catch it. Undermount fixing needs a rigid benchtop material - stone, engineered stone or solid surface - since laminate benchtops generally aren't suitable for undermount installation without specific edge banding.

Because the basin is fixed from below with adhesive and mechanical clips, undermount installation is usually done by your stone fabricator at the same time the benchtop is templated and cut, rather than by the plumber. Confirm the basin model before the benchtop is templated, since the cutout is sized to the specific basin's rim. Check the tap hole position is confirmed in the benchtop template too - undermount basins are usually paired with deck-mounted tapware drilled through the stone rather than through the basin itself.