What is an undermount sink?

An undermount sink sits below the level of your worktop, secured to the underside so that the worktop edge appears clean and continuous. Unlike inset or Belfast sinks that sit on top of the counter or perch on its rim, an undermount creates a seamless junction between sink and surface.

The main requirement for an undermount installation is a solid, rigid worktop material. Quartz, granite, composite stone, and solid wood work well because they have the strength to support the sink's weight and withstand the stresses of daily use. Laminate and thin veneered surfaces cannot typically accommodate undermount sinks, as they lack the necessary structural integrity.

This style appeals to homeowners wanting a contemporary look with fewer crevices where debris gathers. The absence of a visible rim or mounting edge simplifies cleaning and gives kitchens a more polished appearance. It also maximizes usable counter space by eliminating the lip that rim-mounted sinks create.

Installation requires precision. The worktop opening must be cut to exact measurements, and the sink is bonded to the underside using silicone or specialized adhesives. Any gaps compromise the waterproofing, so fitting by experienced kitchen fitters is essential. If you are planning an undermount sink, discuss worktop material and structural requirements with your worktop fitting specialist during the design phase.