n any of these styles, “self-rimming” sinks can be used. They are mounted in templated holes cut in the countertop (or substrate material) using a jigsaw or other cutter appropriate to the material at hand and are suspended by their rim. The rim forms a close fit, reinforced with a sealant, on the top surface of the countertop, especially when the sink is clamped into the hole from below.

Most materials also allow the installation of a “bottom-mount” or “under-mount” sink. With these, the edge of the countertop material is exposed at the hole created for the sink (and so must be a carefully finished edge rather than a rough cut; this cut is generally done at the fabricator’s workshop). The sink is then mounted to the bottom of the material from below. Especially for under-mount sinks, based sealants are typically used to assure a waterproof joint between the sink and the countertop material. The advantage of an “under-mount” sink is that it gives a contemporary look to the kitchen but the disadvantages are extra cost in both the sink and the countertop.

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