How to Secure a Dishwasher to Quartz Countertop


  • Clear the area under and around the countertop where the dishwasher will be installed. Remove any flooring or baseboards that may interfere.
  • Check the underside of the countertop and make sure it is completely smooth and level. Any protrusions or uneven areas need to be sanded down.
  • Purchase the mounting brackets designed for your specific dishwasher model. Read the installation instructions carefully.
  • Gather the necessary tools – drill, drill bits, screwdriver, tape measure, level, safety glasses, etc.

Mounting Bracket Installation

  • Determine the exact position where you want the dishwasher installed. Mark the underside of the countertop clearly.
  • Hold the mounting brackets against the marks and use them as a template to mark the screw holes.
  • Drill pilot holes at the marks. The size of the holes should match the brackets’ screw size. Drill slowly and carefully to avoid cracks.
  • Place the mounting brackets over the pilot holes and insert screws to secure them to the countertop. Do not overtighten.

Securing the Dishwasher

  • Carefully lift or slide the dishwasher into position under the countertop, aligned with the mounting brackets.
  • Attach the dishwasher brackets or clips to the mounting brackets. This may require some adjustment of the dishwasher feet for proper height.
  • Insert screws through the aligned brackets. Tighten securely but not excessively.
  • Open the dishwasher door slowly and check for any interference or contact with the countertop. Readjust if needed.
  • Add sealant or silicone around the edges for moisture protection. Avoid getting sealant on the mounting hardware.

Additional Tips

  • Use extreme care when drilling into quartz to avoid cracking the surface. Go slowly with sharp drill bits.
  • Allow proper airflow clearance around the dishwasher according to the manual specifications.
  • Level the dishwasher properly so the door closes and seals correctly when installed.
  • Test the installation by running the dishwasher. Check for any leaks, odd noises or other issues.
  • For a built-in look, attach a custom door panel to match surrounding cabinetry.

Securing a dishwasher properly to a quartz countertop takes precision but is very achievable with the right steps. Taking it slow, checking measurements twice, and following the manufacturer’s directions will result in a stable installation. With care and patience, you can have a seamlessly integrated dishwasher that functions perfectly without damaging the beautiful quartz surface.

Frequently Asked Questions

What type of screws should be used to mount a dishwasher to quartz?

Self-tapping metal screws designed for stone/quartz materials are best. Avoid wood screws. Pilot holes are highly recommended prior to inserting screws to prevent cracking.

How can I get a built-in look for my portable dishwasher?

Attaching a customized front door panel that matches surrounding cabinets to the dishwasher can give it the look of being permanently built-in. Panels can be purchased or custom made.

What can cause a dishwasher to leak when installed on quartz?

Improper sealing around the edges can lead to leaks. Make sure to apply waterproof sealant/caulk and allow to fully cure before running dishwasher. Misaligned installation can also cause leaks over time.

Should any reinforcement be added under the quartz for the dishwasher?

It is advisable to add wood blocking flush with the base cabinet frame prior to installing quartz. This gives a solid anchor point for the mounting brackets.

How much space should be left around a free-standing dishwasher?

Leave a minimum of 2 inches clearance on the sides for proper ventilation and appliance operation. Do not completely enclose the dishwasher.


Installing a dishwasher on quartz countertops adds convenience without sacrificing beauty. With careful planning, precision drilling, proper mounting hardware, and sealing, you can have a dishwasher that functions flawlessly for years to come. Following the manufacturer’s directions combined with a gentle touch will allow you to integrate modern appliances into your dream quartz countertop.