Turner Hastings Narva 57x 39 Undercounter Pill Basin

An undercounter basin (also called undermount basin) is installed below the benchtop surface, with the benchtop material cut to the basin opening and the basin bonded underneath. This creates a seamless, flush benchtop with no rim or lip, water and mess can be wiped directly from the benchtop surface into the basin.

Undercounter basins require a benchtop material that can be cut cleanly and finished at the edge, stone (natural or engineered), solid surface, and some composite materials are all suitable. Laminate benchtops are generally not recommended for undermount installations as the exposed cut edge can swell and delaminate with water contact. Stone benchtops are the most popular choice for undermount basin applications in Australian bathrooms.

The seamless junction between the basin and benchtop in an undermount installation is easier to keep clean than the raised rim of an inset basin, which can accumulate grime around the silicone seal. The unbroken benchtop surface allows easy wiping of water and soap, making undermount basins a popular choice in high-use family bathrooms.