Can I Drill a Hole in a Quartz Countertop?

Quartz countertops are durable and lovely additions to any kitchen. However, you may need to drill holes in a quartz countertop for fixtures or appliances. Here is what you need to know about drilling into quartz.

What is Quartz?

Quartz countertops, sometimes called engineered stone, are made from ground quartz crystals combined with resins and pigments. The result is a non-porous, stain-resistant, and durable material that is an increasingly popular choice for kitchen and bathroom countertops.

Can You Drill into Quartz?

Yes, it is possible to drill into quartz countertops. However, quartz is a very hard material, so drilling requires special bits and techniques.

Here are some tips for drilling into quartz:

  • Use diamond-tipped drill bits designed for drilling into stone. Carbide or high-speed steel bits can crack or chip quartz.
  • Drill at low speeds – 500 rpm or less. High speeds can burn or crack quartz.
  • Drill gently without forcing the bit. Apply even, light pressure.
  • Cool the bit with water to prevent overheating.
  • Start with a smaller pilot hole before using a larger bit for the final hole size.
  • Use tape or a template to mark the desired hole location.
  • Place a piece of wood or scrap material beneath the quartz to prevent chipping on the underside.

What Tools are Needed to Drill Quartz?

To safely drill holes in a quartz countertop, you need:

  • A variable speed drill for control of drilling speed
  • Diamond-tipped core drill bits for stone
  • Eye protection
  • Ear protection – drilling quartz can be loud
  • Water source and rags to keep the bit cool
  • Tape or template to mark the desired hole location
  • A piece of scrap wood to place under the quartz
  • Optional: drill stand or guide for stability

Avoid using household drills at high speeds. Investing in diamond-tipped bits and a variable speed drill will help ensure clean holes.

How to Drill a Hole in Quartz Countertops

Follow these steps for smooth drilling into quartz:

  1. Mark the desired hole location using a template or tape.
  2. Place a piece of scrap wood or plyboard beneath the quartz hole location.
  3. Start with a smaller 1/8-inch pilot hole using a diamond-tipped bit. Drill at 300-500 rpm.
  4. Use a spritzer bottle to regularly wet the drill bit and hole to keep cool.
  5. Once the pilot hole is completed, switch to a larger diamond-tipped bit the size of your desired final hole.
  6. Drill gently into the quartz, letting the drill do the work. Apply light pressure only.
  7. Continue cooling and drilling until you break through the underside.
  8. Vacuum and wipe away all quartz dust when finished.
  9. Smooth rough edges using a file or sandpaper if needed.
  10. Wash the countertop to remove residue.

Proceed cautiously, drill at low speeds, and keep the bit lubricated for best results. Don’t force or rush the process.

Mistakes to Avoid When Drilling Quartz

Drilling quartz presents some hazards to avoid:

  • Drilling at high speeds, which can crack, chip, or discolor quartz. Always use low drill speeds.
  • Using the wrong drill bits – never use standard twist drill bits meant for wood or metal.
  • Forcing the drill or applying too much pressure, leading to cracks.
  • Failing to keep the bit cool with water, potentially burning the quartz.
  • Not using a backer board, causing underside chipping.
  • Rushing the process leads to mistakes. Drill carefully.

With care, patience, proper tools, and technique, drilling clean holes in quartz countertops is achievable for DIYers.

How to Finish Drilled Holes in Quartz

Once your holes are drilled, here are some finishing tips:

  • Clean all quartz dust from the countertop, backsplash, and floor using a vacuum and damp rag.
  • Smooth any rough drill hole edges using 100-300 grit sandpaper.
  • Wash the countertop with warm, soapy water to remove oily residue.
  • Consider sealing holes/edges with caulk or silicone sealant to prevent moisture entry.
  • For sink holes, set the sink and use clear silicone adhesive to secure and seal the sink rim.

Taking time to clean and finish drilled quartz properly will help maintain its beauty and function.

Can You Drill Through Quartz Yourself?

With the right tools and techniques, DIY drilling of quartz countertops is certainly possible. However, quartz requires more care and precision than other stones. If you lack the specialized drill bits, variable speed drill, and patience for the process, professional installation may be the best option to avoid expensive mistakes.

Factors like hole size, location, countertop thickness, and DIY comfort level should be considered. delicate areas like sink cut-outs are riskier than individual fixture holes. Get professional advice before attempting complex quartz drilling projects.

Professional Quartz Drilling/Installation

For DIYers uneasy about drilling their expensive quartz counters, hire a professional fabricator or installer. They have industrial tools and expertise to precisely cut holes and edges while minimizing mistakes.

Costs vary based on the project’s complexity. However, paying a professional to drill quartz can provide peace of mind and prevent ruined countertops. Get quotes from a few respected businesses before choosing a provider.

With careful planning and preparation, drilling your own quartz countertop is certainly possible. But for large or tricky jobs, a professional touch may be worth the investment.


Drilling holes in quartz countertops is achievable with the right diamond-tipped bits, variable speed drill, careful technique, and patience. Cool the drill with water to prevent burning and always use a backing board. While DIY quartz drilling is possible, complicated jobs may warrant hiring a professional installer to prevent expensive errors. With caution and care, holes can be cleanly drilled in quartz to allow for sinks, faucets, and other fixtures to be installed.