How to Drill a Hole Through Quartz Countertop

Drilling holes through a quartz countertop can seem daunting, but with the right tools and technique, it can be done successfully. Quartz is an engineered stone made from crushed quartz aggregates held together by resin – this makes it extremely hard and durable. By following some key steps, you can drill the holes you need while avoiding cracks and chips.

What You’ll Need

  • Protective gear – safety glasses, ear protection, dust mask
  • Marking tools – pencil, tape
  • Electric drill
  • Diamond-grit hole saw bit (use one specifically designed for stone/quartz)
  • Cutting board or scrap wood
  • Vacuum and brush

Before You Start Drilling

Pick the right location – Avoid drilling too close to edges or seams which could weaken the structural integrity. Allow at least 2 inches distance.

Mark the holes – Use a pencil to mark the center of each hole. Place tape over the marks to prevent skipping.

Work on a proper surface – A cutting board or piece of scrap wood provides a soft, scratch-resistant surface.

Check behind the quartz – Make sure there are no pipes or wires where you plan to drill to avoid damage.

Use water – Have a spray bottle of water to keep the bit lubricated during drilling to minimize heat buildup.

Step-by-Step Process

1. Put on safety gear

Protect your eyes, ears, and lungs from flying debris before drilling. This is an important safety step.

2. Mark the holes

Use a pencil to lightly mark the center of each hole needed. Apply masking tape over the marks so the drill doesn’t skip.

3. Prepare work surface

Place a cutting board or piece of scrap wood on the countertop to drill into. This prevents scratches and damage to the quartz surface.

4. Start drilling slowly

Place the diamond-grit hole saw over your mark, using light pressure at first. Let the tool do the work.

5. Lubricate and drill through

Spritz water to keep the bit wet. Maintain steady pressure until you drill all the way through the quartz.

6. Back out carefully

Once the hole is complete, slowly back the hole saw out, turning it in reverse to exit the hole cleanly.

7. Smooth rough edges

Use a file or sandpaper to gently smooth any rough edges around the freshly cut hole.

8. Clean up debris

Vacuum up all quartz dust and debris. Wipe the area clean when finished with a damp cloth.

Expert Tips

  • Go slow and steady with the drilling pressure – don’t force it.
  • Choose variable speed on your drill for optimal control.
  • Clear debris from the hole saw to prevent binding.
  • Avoid drilling through any quartz seams or uneven areas.
  • Apply painter’s tape on the exit side of holes to prevent chipping.
  • Use a diamond bit made specifically for quartz for best results.

Frequently Asked Questions

What size hole saw should I use?

Use a hole saw 1/8″ to 1/4″ larger than the size of the hole needed. This prevents binding and creates a cleaner opening.

Can I drill through quartz with a regular drill bit?

No, you should always use diamond-grit hole saw bits rated for stone drilling. Standard drill bits are likely to crack or damage quartz.

What’s the best way to get a neat, clean hole?

Going slow, using steady pressure, keeping the bit lubricated, and backing out carefully will get you the best results. Rushing causes cracks and roughness.

Is it okay to drill near the sink or cooktop cutouts?

It’s best to avoid drilling too close – no closer than 2 inches – to any seam or cutout edge to prevent weakening the structure.

What speed should I run the drill at?

Variable speed is best to start slowly and increase as you drill through. Around 600-900 RPM often works well for quartz holes.

Can I drill through quartz myself or do I need a professional?

With the right tools and caution, drilling holes through quartz can definitely be a DIY project for most homeowners. Just take it slowly!


Drilling clean holes through thick quartz does require patience and the right techniques. By following safety precautions, using diamond-grit bits, drilling slowly, lubricating the bit, and cleaning up carefully, homeowners can successfully add holes to their quartz countertops. Just remember to double check for pipes and wires first, and always wear protective gear when operating power tools. With precision and care, you can drill holes through quartz and maintain its durability and beauty.