How do i drill through tiles without cracking them? (2026)
Quick Answer
To drill through tile without cracking it, use the right bit for the tile type, stop the bit from skating, drill slowly with light pressure, and keep heat down. The key is to let the bit grind rather than punch, and to avoid hammer action until you are fully through the tile and into the backing if the fixing requires it.
Overview
Drilling tile cleanly is mostly about control. Tiles crack when they are shocked, overheated, drilled with the wrong bit, or loaded unevenly near an edge or unsupported area. Ceramic is usually the easiest to drill; porcelain is much harder and often needs a diamond bit; natural stone and glass tiles need extra care because they can chip or fracture if the bit grabs. Before you start, work out exactly what sits behind the tile so you do not hit a pipe, cable or waterproofing detail. Mark the hole carefully, tape the surface if needed to help stop the bit wandering, and support the drill square to the wall or floor so pressure stays even. Start at low speed and do not use hammer mode on the tile itself. Once you are through the glazed face and body of the tile, you can switch to the appropriate bit for the substrate behind if needed. Cooling the bit, clearing dust and pausing rather than forcing progress all reduce the risk of cracks. If the hole is close to an edge, the tile is already loose, or the wall is in a wet area with hidden waterproofing, the job becomes riskier and may be better handled by a tiler or suitable tradesperson.
Who this is for
Homeowners and DIYers needing to fit accessories, fixings or pipe penetrations through existing wall or floor tiles.
What you’ll need
- Drill with variable speed
- Correct tile bit for the tile type, often a carbide spear-point bit for ceramic or a diamond tile bit for porcelain, glass or stone
- Masking or painter's tape
- Marker or pencil suitable for tile
- Clean water for cooling where suitable for the bit and tool instructions
- Safety glasses
- Dust mask if drilling dry or into masonry behind the tile
- Vacuum or cloth for dust
- Stud, pipe and cable detector where appropriate
- Appropriate substrate bit and wall plug or fixing if going into masonry, timber or board behind the tile
Before you start
Identify the tile material and check the bit manufacturer's guidance for suitability. Confirm what is behind the tile and avoid hidden services. Check whether the tile is firmly bonded; a hollow-sounding or loose tile is more likely to crack. Avoid drilling too close to edges, corners or existing cracks where possible. If the tile is in a shower, wet room or other waterproofed area, think about how the hole will be sealed afterwards to protect the waterproofing system.
Step-by-step
- 1
Choose the right bit and setting
Match the bit to the tile. Use a tile-suitable bit for the tile itself, and make sure hammer action is off before you touch the surface. If you need to continue into brick, block, timber or board behind the tile, have the correct second bit ready for that layer.
Why: Wrong bits and impact action are common causes of chipping and cracks. Tile needs grinding or scraping action, not hammering.
- 2
Mark and stabilise the drilling point
Mark the hole position carefully. Apply a small cross of masking tape over the mark if the surface is glossy or the bit tends to skid. Check alignment against the fitting before drilling.
Why: A stable start helps the bit bite gently instead of skating across the glaze and scratching the tile.
- 3
Check behind the tile
Use a suitable detector and your knowledge of the room layout to check for pipes, cables and other services. In bathrooms and kitchens, be especially cautious around known plumbing routes and electrical zones.
Why: Avoiding hidden services matters more than the hole itself; striking a pipe or cable can cause serious damage or injury.
- 4
Start the hole slowly
Hold the drill square to the tile and begin at low speed with light, steady pressure. Some people find it easier to begin at a slight angle to create a tiny starting mark, then bring the drill upright once the bit has located, but only do this gently.
Why: A slow, controlled start reduces wandering and prevents sudden shock loads that can crack the glaze or tile body.
- 5
Keep the bit cool and clear debris
Pause as needed and follow the bit manufacturer's instructions on cooling. Where appropriate, use a little water to keep heat down, taking care around electric tools and fittings. Lift the bit occasionally to clear dust from the hole.
Why: Heat and packed dust increase friction, dull the bit and raise the risk of cracking or surface chipping.
- 6
Finish the tile before changing technique
Continue until you are fully through the tile layer. Only then, if needed and if suitable for the substrate, switch to the correct bit and drilling mode for the backing material. Do not re-engage hammer action while the bit is still in contact with the tile.
Why: The tile is the brittle layer. Once past it, the backing often needs a different approach, but impact on the tile can damage it instantly.
- 7
Fit the fixing and seal if required
Clean out dust, insert the correct fixing for the substrate, and install the fitting without overtightening. In wet areas, seal around penetrations as recommended by the waterproofing or sanitary sealant manufacturer.
Why: Overtightening can crack the tile after the hole is drilled, and unsealed penetrations can allow water into the wall or floor build-up.
Why this works
Tiles are hard but brittle. A suitable tile bit removes material gradually with less shock, while low speed, light pressure and cooling reduce stress and heat. Keeping the drill square and avoiding hammer action on the tile prevents uneven loading that can turn a small flaw into a visible crack.
Common mistakes to avoid
- Using a standard masonry bit from the start on hard porcelain or glassy surfaces
- Leaving hammer mode on while drilling the tile
- Pushing too hard instead of letting the bit work
- Drilling too close to a tile edge, corner or existing crack
- Skipping checks for pipes, cables or weak substrate behind the tile
- Overtightening the screw or fixing after the hole is made
Troubleshooting
The bit keeps slipping across the tile
Use masking tape over the mark, reduce speed, and start with very light pressure. Confirm you are using a bit designed for that tile type.
The tile surface chips around the hole
Slow down, reduce pressure, and make sure the bit is sharp and appropriate. Check that the tile is well bonded and not vibrating or loose.
Progress is extremely slow
Porcelain and stone can be much harder than ceramic. Change to a suitable diamond tile bit, keep heat down, and do not force the drill.
The tile cracks as the screw is tightened
Remove the load, check that the fixing is correct for the substrate, and avoid overtightening. Use spacers, washers or the fitting hardware specified by the manufacturer if provided.
Dust or slurry builds up in the hole
Pause and clear the hole regularly. Follow the bit maker's guidance on dry or wet use and keep the work area controlled.
Compare your options
Carbide spear-point tile bit
Best for: General ceramic wall tile and lighter-duty drilling
Pros: Widely available, straightforward to use, good for small fixing holes
Cons: Can struggle on very hard porcelain or some stone tiles and may wear faster
Diamond tile bit or hole saw
Best for: Hard porcelain, glass, stone, and larger clean holes
Pros: Better suited to hard, dense tile and often gives cleaner results
Cons: Usually costs more and needs careful cooling and technique
Masonry bit after the tile is penetrated
Best for: Drilling the substrate behind the tile where appropriate
Pros: Suitable for brick or block backing once through the tile
Cons: Not the right choice for starting on the tile face
| Option | Best for | Pros | Cons |
|---|---|---|---|
| Carbide spear-point tile bit | General ceramic wall tile and lighter-duty drilling | Widely available, straightforward to use, good for small fixing holes | Can struggle on very hard porcelain or some stone tiles and may wear faster |
| Diamond tile bit or hole saw | Hard porcelain, glass, stone, and larger clean holes | Better suited to hard, dense tile and often gives cleaner results | Usually costs more and needs careful cooling and technique |
| Masonry bit after the tile is penetrated | Drilling the substrate behind the tile where appropriate | Suitable for brick or block backing once through the tile | Not the right choice for starting on the tile face |
Alternatives
- Use adhesive-mounted bathroom accessories instead of drilled fixings where the product and wall condition allow
- Drill through a grout joint rather than the tile face if the fitting position allows and the joint is sound
- Have holes made before tiling if you are planning a new installation
Pro tips
- Keep the drill as steady and upright as possible once the hole has started
- If you need several holes, test your method on a spare tile first if you have one
- For glossy tiles, tape often helps both marking and bit control
- Stop as soon as you feel the bit break through the tile so you do not lurch forward into pipes or soft backer
- Support heavy accessories properly; the substrate strength matters as much as the tile
Safety notes
- Wear eye protection because tile chips and dust can fly unexpectedly
- Treat bathrooms, kitchens and utility areas as high-risk for hidden pipes and cables
- Follow the drill and bit manufacturer's instructions, especially for any wet drilling method
- Control dust and avoid inhaling tile, grout or masonry dust
- Do not drill into tiled wet-area waterproofing unless you can reseal the penetration correctly
Legal & regulatory notes
Rules for electrical work, plumbing penetrations and wet-area waterproofing vary by location. If the drilling affects a regulated area or could compromise a waterproofed enclosure, check local building requirements and product instructions before proceeding.
What this guide does not cover: This guide covers drilling small holes in existing tiles for typical household fixings. It does not cover large service penetrations, underfloor heating, specialist stone restoration, or repairing cracked tiles and damaged waterproofing systems.
Cost considerations
The cheapest route is often using the correct bit first time; replacing a cracked tile or repairing waterproofing usually costs more than buying a suitable tile bit. Hard porcelain and stone typically need more specialised consumables than basic ceramic tile.
Prefer to hire a professional?
If this job is beyond a confident DIY — or the work needs to be done by a licensed professional — you can find a verified qualified local tradesperson through these directories of real, verified trade businesses. Compare local tradespeople, read their details and request quotes before you commit.
Frequently asked questions
Can I use hammer mode on a tiled wall?+
Not on the tile itself. Hammer action should stay off until you are completely through the tile and only then used if appropriate for the substrate behind.
What bit should I use for porcelain tile?+
Porcelain is usually harder than standard ceramic, so a diamond tile bit is often the safer choice. Check the bit manufacturer's packaging or guidance to confirm suitability.
Is it better to drill through grout instead of tile?+
If the fitting location allows, a sound grout joint can be easier and less visible to repair than a damaged tile. However, weak or narrow joints may not hold up well, so substrate fixing still matters.
Should I use water while drilling?+
Sometimes, depending on the bit and the manufacturer's instructions. Cooling can help, but you must use it safely with power tools and only where the bit is designed for it.
Why did my tile crack even though the hole drilled cleanly?+
The crack may have happened from hidden movement, drilling too near an edge, a loose tile, or overtightening the fixing afterwards rather than from the drilling itself.
Sources & references
Guidance on this page is traced to documented sources. Last checked 25 September 2026.
- The Tile Council of North America · industry
Supports general tile industry good practice and the importance of suitable methods and materials for tile installations.
- Bosch Professional · manufacturer
Supports manufacturer-led guidance that bit choice, speed, mode selection and cooling depend on tile material and accessory instructions.
The basic drilling method changes slowly, though bit designs and manufacturer instructions can vary by tile type and product.