How to Drill Through Glass Tile Backsplash

Installing a glass tile backsplash can add a beautiful, modern touch to your kitchen. However, you may need to drill through the tile at some point for various reasons, like to install mounted fixtures or shelves. Drilling through glass tile may seem daunting, but it’s doable if you take the proper precautions. This guide will walk you through the complete process of how to safely and effectively drill through glass tile backsplash.

Understanding Glass Tile

Before drilling, it’s important to understand the properties of glass tile. Here’s a quick overview:

  • Material – Made from glass mixed with pigments and heated to a molten state. The molten glass is poured into molds to create tiles.
  • Thickness – Typically ranges from 1/4″ to 3/8″ thick. Thinner tiles (1/8″) are also available but are more prone to cracking.
  • Durability – Very hard and durable surface, but the glass can crack or shatter if drilled incorrectly.
  • Waterproof – Impervious to water, making it an excellent backsplash choice.
  • Translucent – Glass tile allows some light to pass through for a unique look. Texture and color variations are visible.
  • Styles – Many colors and finishes like glossy, matte, frosted, recycled, etc. Plus shaped, mosaic, and stone-look tiles.

Knowing the properties of the glass tile you’re drilling into is key for success. Check the thickness and type carefully. Now let’s look at how to drill glass tile backsplash properly.

How to Drill Through Glass Tile Backsplash

Drilling glass tile requires patience and the right tools. Follow these steps for best results:

Step 1: Mark the Drill Location

Use a permanent marker to mark the exact spot where you need to drill. This allows precise drilling location.

Be sure to check for any pipes or wires before marking the spot to avoid drilling into them.

Step 2: Apply Masking Tape

Cut strips of masking tape and place them on the tile surface to cover the area around the drilling mark.

Apply at least 2-3 layers of tape. Cover at least 2 inches around the marked drill point.

The tape helps prevent cracks from spreading across the tile surface when the drill bit contacts the glass.

Step 3: Fill a Spray Bottle with Water

Fill a spray bottle with regular tap water. During drilling, you’ll spray the tile surface continuously with water to keep the glass tile cool.

The water prevents the glass from overheating as you drill, which can cause cracks.

Step 4: Attach a Diamond Drill Bit

Diamond drill bits are a must for drilling through glass tile. Carbide or regular drill bits can crack or shatter the glass.

Attach a diamond bit with 1/8″ diameter into your drill chuck. Make sure it’s secure.

Apply light pressure at first. You can bore a larger hole after the initial hole is drilled.

Step 5: Position the Drill at a 45 Degree Angle

Angle the drill at a 45 degree tilt to the glass tile surface.

Be sure the drill bit tip directly contacts the center of your marked drilling point.

The angled entry helps prevent drill skipping across the smooth glass surface when you begin.

Step 6: Drill at Low Speed

Start drilling at a low speed around 350-450 RPM. High speeds can cause excessive heat and crack the glass.

Drill slowly and carefully as the bit makes contact with the glass tile. Apply light pressure.

As the diamond grits grind through the glass, you can increase downward pressure and speed.

Step 7: Spray Water Continuously

Keep spraying water directly over the drill point as you drill. This cools the glass and diamond bit.

Pause regularly to spray more water and allow the tile to cool. Intermittently dip the bit in water as well.

Proper water cooling is vital to prevent overheating, chips, and cracks in the glass tile.

Step 8: Drill Through Tile

Drill slowly and steadily as the bit cuts through the full depth of the glass tile. Ease off pressure near the end.

Take your time – rushing can cause cracking and shattering. Expect the process to take 5-10 minutes.

Wear eye protection as glass chips and water will spray around. Keep spraying water.

Step 9: Smooth Rough Edges

Once drilled, run a coarse grit sandpaper around the hole’s edges to smooth any rough areas or shards.

Use a file to round over the entrance and exit points of the hole for a clean finish.

This prevents the glass edges from chipping further or causing injury when inserting hardware.

Step 10: Install Fixtures

Carefully install any required fixtures, anchors, or hardware into the drilled glass tile.

Use appropriate screws and fittings to avoid cracking the surrounding glass tile.

Seal around fixtures with silicone caulk to prevent moisture entering the open space behind the tile.

And that’s it! Follow these safe drilling techniques for installing fixtures or other accessories through glass tile backsplash. The key is using diamond bits, cooling water, and careful pressure.

Tips for Drilling Success

Drilling through glass tile backsplash takes skill and the right techniques. Here are some helpful tips:

  • Go slow with the drill – never rush the process. Slow and steady gives the best results.
  • Let the diamond bit do the work – don’t apply excessive pressure, just steady downward force.
  • Keep the glass surface wet and cool at all times when drilling to prevent cracks.
  • Use masking tape around the drill area to reduce tile chipping and cracking.
  • Frequently stop drilling to allow the tile and drill bit to cool down.
  • Start with a smaller 1/8″ diamond bit for pilot hole before using larger diameter bits.
  • Angle drill at 45 degrees to start – this prevents skidding across the smooth glass.
  • Apply firm pressure when exiting the back of the tile to prevent chips and cracks.
  • Smooth any rough edges around the drilled hole with sandpaper or a file.
  • Seal around hardware with flexible silicone caulk to prevent moisture intrusion.

Follow these tips along with the step-by-step instructions and you can successfully drill glass tile backsplash installations. Just remember – patience and the proper precautions are key.

What Tools Are Needed?

Having the right tools for drilling glass tile makes the job much easier. Here are the essential tools you’ll need:

  • Diamond drill bits – Carbide bits can shatter glass tile. Diamond grit bits are a must.
  • Electric drill – Use a variable speed drill with tight chuck for secure bit grip. Cordless works if battery has ample charge.
  • Masking tape – covers surrounding tile to reduce chance of cracks spreading.
  • Spray bottle – fills with water to keep glass surface wet and cool while drilling.
  • Sandpaper – used after drilling to smooth rough edges around hole.
  • Safety glasses – protects eyes from spraying water and glass shards.
  • Gloves – reduce hand fatigue and protect fingers when handling glass.
  • Caulk/silicone – seals between hardware and drilled glass tile hole. Waterproof flexible caulk works best.
  • Drill angle guide – optional but useful for ensuring perfect 45 degree drill angle on the tile.

Investing in the proper drilling tools helps immensely when you need to drill into glass tile backsplash. It reduces frustration and mistakes.

Common Problems and Solutions

Drilling glass tile backsplash can sometimes lead to a few issues, depending on the tools and techniques used. Here are some common problems and how to prevent them:


  • Use diamond drill bits, not regular carbide bits
  • Keep glass tile wet and cool by spraying water continuously
  • Ease up on pressure as drill bit exits the tile


  • Tape around drill area to reduce surface chips
  • Smooth edges after drilling with sandpaper
  • Don’t rush the process – drill slowly


  • Maintain proper drill speed around 350-500 RPM
  • Apply gradual pressure, especially when starting
  • Use steps to prevent overheating of glass tile

Uneven Holes

  • Keep drill steady at 45 degree angle to tile
  • Use a drill guide for straight holes
  • Start with pilot hole before widening diameter

Drill Skipping

  • Angle drill at 45 degrees to tile when starting
  • Use light pressure at drill contact point

By following the full drilling instructions and using diamond bits, most common issues can be avoided. Patience and care results in clean and smooth drill holes.

How to Drill Through Different Glass Tile Types

The techniques for drilling glass tile are basically the same regardless of the specific type or style of glass. However, here are some tips for different glass tile varieties:

  • Mosaic glass tile – Use mosaic nippers to remove entire tiles where needed to simplify drilling. Tape small individual tiles together before drilling to prevent cracks between them.
  • Body glass tile – Dense and durable but prone to chipping on underside as bit exits. Reduce pressure and speed for the last 1/8” of drilling.
  • Recycled glass tile – Contains various impurities so drill at slower speeds to prevent cracking. Increase water flow since impurities generate more heat.
  • Frosted or textured glass tile – The rough surface can cause drill bit skipping. Maintain steady downward pressure when starting the hole.
  • Transparent glass tile – Allows more light to pass through. Monitor chip development on tile underside since it’s visible from the front.
  • Large format glass tile – Larger tiles flex more than mosaics. Use tape to support bottom side and minimize flexing during drilling.

With any glass tile, the essential techniques remain the same – diamond drill bits, water cooling, steady speed, and care to prevent overheating and shock. Just adjust water and pressure as needed for different tile varieties when drilling.

How to Drill Glass Tile Undermount Sink Holes

Undermount sinks require drilling multiple holes through glass tile for clips and anchors to secure the sink. Here are some tips for clean sink holes:

  • Review sink specs to mark exact drill locations based on clip positions.
  • Grind clip recesses into the tile before drilling if possible, avoiding thick glass cuts.
  • Start holes with 1/8” diamond bit followed by step bits to widen diameter for anchors.
  • Angle drill perpendicular to the tile when widening holes to desired size. Prevent skidding.
  • Smooth all holes thoroughly with sandpaper so clip edges don’t cause cracks.
  • Use silicone caulk around edges of sink holes for water protection.

With careful hole placement and drilling, undermount sinks can be nicely integrated into glass tile backsplash. Follow the kitchen sink manufacturer’s instructions precisely.

How to Drill Shelves or Towel Bars Into Glass Tile

Installing hanging shelves, towel bars, and other accessories involves drilling into glass tile. Here are some best practices:

  • Choose appropriate hollow wall anchors for the weight of the accessory. Avoid excessive weight on glass tile.
  • Angle the drill perpendicular to the tile when drilling fixture holes. Prevent skidding.
  • Widen holes incrementally to accommodate anchor diameters. Don’t crack tile by forcing in anchors.
  • Purchase specialty glass shelf brackets if needed. Some come with rubber cushions to prevent cracking.
  • Only apply silicone/caulk around the anchored edge of shelves. Don’t block moisture venting.
  • For towel bars, use wall plates or spanned supports to distribute weight across multiple anchor points.

With proper fixtures and drilling techniques, glass tile can support light to medium-weight accessories. Just distribute weight carefully.

How to Cut Out Sections of Glass Tile

Sometimes electrical boxes, pipes, or other items may require cutting out whole sections of glass tile. Here’s how to do it neatly:

  • Mark the tile area to be removed with painter’s tape for clean straight cuts.
  • Score along cut lines multiple times with a glass cutter. Use straightedge as a guide.
  • Tap a wide putty knife with hammer on score lines to split tile. Wear gloves and eye protection.
  • Make multiple passes with the knife to remove tile sections cleanly from the cut lines.
  • Use a diamond pad wet saw for any curved cuts if necessary. Go slowly to prevent tile heating and cracking.
  • Smooth rough edges with sandpaper. Clean up sharp shards or tile pieces.

Cutting out sections of glass tile backsplash takes patience but creates straight edges. Allow ventilation and access as needed while minimizing damage to surrounding tiles.

Can You Drill Through Glass Tile Without Diamond Bits?

It’s best to always use diamond drill bits when drilling glass tile. Carbide or multi-purpose bits often result in cracking, chipping, and shattering. Here’s why diamond bits are required:

  • Hardness – Diamond is one of the hardest materials, able to grind through tough glass.
  • Heat resistance – Diamonds maintain hardness and grinding ability at high temperatures generated when cutting glass.
  • Friction – Diamond crystalline structure provides smooth cutting action with less friction than other drill bit materials.
  • Sharpness – Excellent sharpness from industrial diamond grit for clean cutting instead of fracturing the glass tile.

While carbide or ceramic bits can technically drill glass, extensive cracking damage usually occurs. It’s not worth ruining the surrounding tiles to avoid buying diamond bits. Invest in quality diamond bits for successful glass tile drilling.

Drilling Do’s and Don’ts

Keep these dos and don’ts in mind when drilling glass tile:


  • Use diamond drill bits
  • Keep glass surface wet with spray bottle
  • Apply tape around drill area
  • Start drill at 45 degree angle
  • Smooth rough edges after drilling


  • Rush the drilling process
  • Apply excessive pressure
  • Drill without eye protection
  • Use carbide or multipurpose bits
  • Try to enlarge holes in one pass

Follow the dos and don’ts along with the step-by-step instructions outlined earlier for best results drilling glass tile backsplash. Patience and proper methods allow you to drill clean openings without damaging surrounding tiles.

Drilling Glass Tile FAQs

Let’s review answers to some frequently asked questions about drilling through glass tile:

What size diamond drill bit do I need?

Start with a 1/8 inch diamond bit for a pilot hole. This can then be enlarged to final size incrementally with step bits or larger diamond bits.

Can I use a Dremel tool to drill glass tile?

Yes, a Dremel with diamond bits can drill glass tile. Maintain low speeds. Allow time for adequate water cooling between passes.

What RPM should I drill glass tile?

Ideal drill speed is 350-500 RPM for glass tile. Too fast RPM overheats the glass and causes cracking. Too slow reduces drilling effectiveness.

How long does it take to drill a hole in glass tile?

Expect each 1/4” hole to take 5-10 minutes drilling carefully. If enlarging the hole after a pilot, budget more time. Don’t rush the process.

Do I need water when drilling?

Yes, spraying water while drilling is mandatory to cool the glass tile and prevent cracking from overheating.

How do I smooth rough edges around holes?

Use 60-80 grit sandpaper wrapped around a dowel to smooth and round over sharp edges or shards around holes.

Can any drill be used for glass tile?

A quality variable speed drill with tight chuck grip works best. Either electric or cordless drills can be used as long as battery has full charge.

Follow these tips and frequently asked questions to gain confidence when you need to drill into glass tile backsplash installations. Just remember to have patience and use diamond bits for clean openings.


Drilling holes in glass tile backsplash can be successfully completed with proper techniques and diamond drill bits. The most important steps include marking holes precisely, taping around drill sites, using water cooling, and drilling at low speeds with a 45 degree angle. Patience is key – don’t rush the process and allow time for adequate cooling. Follow the instructions closely for clean openings.

With the right approach and tools, holes can be drilled in glass mosaic tiles or large format glass tiles without ruining the surrounding tile. Smooth any sharp edges after drilling. The finished product will look like the holes were factory cut. Just take it slow and use common sense precautions when drilling glass. Your new fixtures or accessories will then add the perfect finishing touch mounted through the glass tile backsplash.