Undermount sinks are affixed to the underside of the counter. They are helpful when trying to wipe down bench crumbs into the sink as they do not have a lip like top-mount sinks. They provide a very clean, contemporary look. Image 6 is particularly asterisked because undermount sinks in laminate countertops have a rim that comes up flush to the countertop to protect the particleboard. Otherwise, undermount sinks in all other countertops are overlapped by the counter.
Flush mount has the same benefit as the undermount, in that there is no obstructive lip, but the look of a top-mount. The counter is routed around the sinkhole the depth of the sink lip so that when the sink drops in it becomes flush with the counter surface.
Otherwise known as drop-in sinks, they are the traditional mounting option. A rough hole is cut in the counter and the sink drops in, covering any poor cutwork. They are cheap and easy to install. They do have a lip which prevents crumbs being wiped directly into the sink.
Also known as farmhouse sinks or butler sinks (for their shallower equivalents), a Belfast sink will have an open face to the front. This provides a much more traditional country aesthetic, but can occasionally be introduced into a more modern setting.
An integrated sink appears to be a continuation of the countertop with no visual join. It is only available in solid surface countertops. The sink and counter can either be formed together in one piece, or the sink can be installed and the joints covered with the application of a resin and polish. It offers the largest flexibility of any other sink as it is possible to design any shape or size. A drainboard can also be formed into the counter surface.