How to Install a Bottom-Mounted Kitchen Sink

An undermount sink can be both a stylish and practical addition to any kitchen. Its clean and modern looks can help update the style of a kitchen and the ability to wipe counters directly into the sink makes for quick and easy cleanups. And with the right tools and a little patience, most DIYers can add this style of sink to a kitchen.

Things You'll Need

• Sink
• Jigsaw
• Drill and various bits
• Pencil
• Latex caulk
• Screwdriver
• Rubbing alcohol
• Rag

Instructions

1. Mark the countertop where the hole must be cut, using the template that comes with the sink. Double-check this marking with plumbing fixtures both above and below the counter and with the alignment of the cabinets.

2. Drill a 1/2-inch diameter hole into the center of the section being cut out. Using the jigsaw and working from the top to help reduce chipping, carefully cut along the template lines. Sand edges if necessary to create a smooth edge.

3. Mark the holes for the mounting screws on the underside of the countertop, using the template. Pre-drill the holes, using a bit slightly smaller than the screws.

4. Wipe down the top edges of the sink and the underside of the countertop with rubbing alcohol and run a bead of latex caulk around the top of the sink.

5. Position the sink and fasten with mounting screws. Wipe up any caulk that has squeezed out from the edges. Allow the caulk to set up overnight before installing the drain and faucet.

Tips & Warnings

• An undermount sink should only be used with a solid-surface countertop material. Laminate countertops, even if sealed, will get moisture inside and eventually begin to peel up. Many countertop manufacturers offer pre-cut models for undermounted sinks.

• This task is more easily accomplished before mounting the countertops so that the counters can be flipped as needed when installing the sink.

References

• Thisoldhouse.com: Installing an Undermount Sink