Can I Do an Undermount Sink with Quartz Countertops?

Installing an undermount sink with quartz countertops can add a clean, modern look to your kitchen. But it’s important to consider a few factors before deciding to pair an undermount sink with quartz. Here is a detailed guide on whether and how to install an undermount sink with quartz countertops.

What is an Undermount Sink?

An undermount sink is installed from beneath the countertop, so the edges of the sink are hidden and you get a seamless transition from countertop to sink basin. Undermount sinks create a smooth and often contemporary look compared to topmount or drop-in sinks that sit on top of the counter.

Benefits of Undermount Sinks:

  • Streamlined appearance for a seamless countertop to sink transition.
  • Easy to keep clean since there is no lip or edge for crumbs and debris to get trapped.
  • Can make a small kitchen appear larger by removing visual breaks at the countertop.

What are Quartz Countertops?

Quartz countertops, sometimes called engineered stone, are made from ground natural quartz crystals combined with resins and pigments. The result is a durable, non-porous surface resistant to scratches, stains and heat.

Benefits of Quartz Countertops:

  • Extremely durable and scratch resistant.
  • Available in wide range of colors and patterns.
  • Non-porous so resistant to stains.
  • Heat and scorch resistant.
  • Minimal maintenance required. Quartz offers the look of natural stone with increased durability and less maintenance. It has become a popular option for kitchen counters.

Can You Install an Undermount Sink with Quartz?

Yes, you can install an undermount sink with quartz countertops. However, there are some special considerations to take into account.

The non-porous, hard surface of quartz makes it well-suited for undermount sink installation. In fact, undermount sinks often highlight the sleek, contemporary look that makes quartz a popular choice.

However, undermount sinks put more stress on the countertop edge. Quartz is durable, but subjecting it to the weight of a heavy sink and continuous water exposure requires extra care. Using a quality undermount sink specifically designed for solid surface counters is important.

Follow the manufacturer’s instructions carefully for cut-out size and installation. Using a highly-skilled fabricator experienced in undermount quartz sink installation is also recommended.

Tips for a Successful Undermount Sink Installation with Quartz

  • Choose an undermount sink made for solid surface countertops. Stainless steel or cast iron undermount sinks are prone to warping or corrosion over time if not designed for quartz installation.
  • Get the exact sink dimensions and specifications for cut-out size. Measure twice to ensure a precise opening.
  • Check if the manufacturer recommends any reinforcements or special waterproofing treatments. Things like wire mesh or additional adhesive/sealant may be suggested.
  • Have the installation done by an experienced professional fabricator. Paying for their expertise can prevent cracks, leaks or other issues.
  • Use a soft buffer between sink edges and quartz surface to prevent chipping if tightening clips or brackets.
  • Check for any small gaps and use clear silicone caulk to seal the transition area between sink and quartz.
  • Use a bottom-mounted grid or rack to protect the quartz sink bottom from getting chipped by dropped kitchen items.

Maintaining an Undermount Sink with Quartz Surround

  • Always use a sink bottom protector grid or rack to prevent scratches and chips.
  • Avoid abrasive cleaners or scouring pads which can damage the quartz over time. Use non-abrasive soap and water for routine cleaning.
  • Rinse thoroughly after using any bleaches, dyes, solvents or chemicals in the sink to prevent etching or discoloration on the quartz.
  • Wipe up spills quickly to prevent stains, especially from ink, coffee and wine. For dried stains, use a non-abrasive cleaner recommended by your countertop manufacturer.
  • Check and re-caulk perimeter sealant once a year or if any gaps appear to prevent moisture seeping under and damaging quartz.


Installing an undermount sink with quartz countertops can create a beautiful, contemporary kitchen design. With special care taken in sink selection, precise installation, preventative edge buffering, and proper maintenance, an undermount sink can be a stunning and functional feature for your quartz countertops. Paying close attention to manufacturer recommendations and hiring an experienced fabricator will help ensure success and prevent damage. With some extra care and effort, you can enjoy the clean lines of an undermount sink paired beautifully with durable quartz.

Frequently Asked Questions About Installing Undermount Sinks with Quartz Countertops

Can any undermount sink be used with quartz countertops?

No, you want to choose an undermount sink made specifically for solid surface countertops like quartz. Stainless steel or enameled cast iron sinks can put too much stress on the quartz edge.

Do I need to reinforce the quartz for an undermount sink?

Sometimes yes. Check manufacturer recommendations. Reinforcements like wire mesh or additional adhesive can strengthen the cut-out area. Many quartz brands designed for kitchen use are engineered to handle undermount sinks when properly installed.

What’s the best way to cut the sink opening in quartz?

It’s best to have a professional fabricator measure and cut the opening using the specifications provided for your exact sink model. The cut-out needs to be precise.

Should I seal around a quartz undermount sink?

Sealing the transition area around the sink perimeter using a clear silicone caulk is highly recommended to prevent moisture seeping under the countertop. This sealant should be checked annually and reapplied as needed.

How can I prevent chipping or cracking around the sink?

  • Use a soft buffer between sink edge brackets and the quartz during tightening.
  • Avoid letting hard metal pans or heavy pots knock against the basin edges.
  • Use a sink bottom grid to protect the quartz surface.
  • Handle spills quickly to avoid prolonged exposure to moisture.

Is it OK to use abrasive cleaners or scouring pads on a quartz undermount sink?

No, abrasives can damage the quartz over time. For routine cleaning, use a soft sponge or cloth with mild soap and water. Check with the manufacturer for approved quartz-safe cleaners.

Should I run water into the sink before turning on the garbage disposal?

Yes, it’s highly recommended to run a stream of cold water into the sink before turning on the disposal. This will prevent chipping at the drain outlet from any vibrations.