How To Install An Undermount Sink

21 Materials
2 Hours

If you are curious how to install an undermount sink, you'll love this step by step tutorial. We show you how to install a sink without removing your countertops. Don't forget to watch the video to see the installation in action!

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Here’s what the sink and faucet looked like before.

Now, are you ready to see the undermount sink installation process?

Step 1: Remove all plumbing and garbage disposal under your sink. Remove old drain assemblies from old sink Remove any brackets or clamps supporting old sink.

Step 2: Cut silicone or epoxy with a razor blade around edge of sink and push down to remove old sink. Remove old faucet.

Step 3: Create sink support system to help with installation with 2x4s and steel bars. See video for more details.

Step 4: Using 2x4 sink support system to hold sink, make sure the sink is centered within the hole in your countertop.

Step 5: Mark edges of sink underneath on the countertop.

Remove sink from area.

Step 6: Drill any holes needed for clamps or brackets provided with your sink under the bottomside of the countertop.

Step 7: Raise sink back up into the correct position.

Step 8: Apply 100% silicone to top rim of the sink and raise up sink into place with the sink support system.

Step 9: Wipe any excess silicone.

Step 10: Reattach drain assemblies by applying plumber's putty on the bottom side of rim on the drain assembly and push into place. Step 11: Reattach all drain assembly pieces underneath sink.

Step 12: Install new faucet.

First of all, it’s drop dead gorgeous. Secondly….I can’t get ENOUGH of the touch on / off feature. I knew I would like it, but I didn’t know just how much I would like it.

If you love this undermount sink installation and want to learn more like it, be sure to check out all of my DIY tutorials in the archives here!

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