How to Install an Undermount Sink

An undermount sink is directly connected to the underneath surface of a countertop, whereas a top-mounted sink sits just above the surface of the countertop. Solid-surface countertops, such as marble or granite, are best for undermounted sinks since they require strong support. While there are various options for your undermount sink installation, such as utilizing clips that require drilling to the underside of your countertop, possibly weakening your new solid surface countertop, or two-part epoxy, we recommend our easy and safe sink bracket kits. The DuraLedge sink mount brackets we offer are easy and quick to install.

Professional installers are often used to ensure a precise finish with an undermount sink installation. The general steps for how to install an undermount sink are as follows:

1. Cut a properly sized hole in the countertop for the sink installation. Either use a supplied sink template or trace the sink on the countertop and reduce the hole size by about 1/2 inch to ensure enough countertop is left to attach the sink.
2. Add epoxy onto the sink’s edges.
3. Place the sink on the countertop’s underside, making sure it is centered properly.
4. Attach our patented sink mount brackets to the sink and base cabinet, then simply adjust until your sink is level.
5. Clean up any caulk or epoxy that squeezes back out.
6. Let the epoxy dry for a minimum of 24 hours or for as long as the manufacturer’s instructions specify.
7. If you have completed the installation of the sink, but have not yet attached the countertop, turn the countertop over and install it over the cabinets using caulk or epoxy for the sink and countertop if applicable, note step 5 if need be.
8. Finish up the installation of the undermount sink by connecting the plumbing and accessories so you can enjoy your new sink.

Our DuraLedge brackets provide excellent, durable support for installing an undermount sink, whether it be a farmhouse, apron, or standard sinks. Order your undermount sink bracket kit today or call us at 715-690-4281 or contact us online with any questions.

**The information contained here should not be taken as professional advice, but rather a general guide to do-it-yourself installation. For best results or professional advice, please consult a professional installer. DuraLedge is not responsible for failure or damage as a result of incorrect sink installation.