Top 7 Tips for Drilling into Tile Without Breaking It

Drilling into tile might seem like a risky move, especially if you’ve just spent time and money laying a brand new splashback. This goes double if you’re drilling into tile that was laid long ago, and you don’t have any spare tiles in case something goes wrong. But with the right gear, a steady hand, and a bit of know-how, both pro tilers and DIYers can get clean, crack-free holes in the toughest porcelain. Whether you’re mounting fittings in a bathroom or cutting through stone tiles on-site, these easy steps for drilling into tile will help you avoid costly mistakes and chipped edges.

Wondering how to drill into tiles? These are Tilers Online’s top seven tips:

1. Choose the Right Drill Bit for the Job

The most important part of drilling through tile is using the right tile drill bit. Standard bits won’t cut it — and we mean that literally. For ceramic or porcelain, a diamond-tipped porcelain tile drill bit is your best bet. These are designed to cut through tough surfaces without splintering or overheating. Check out our full range of tile and stone drilling solutions for the right bit for your job.

2. X Marks the Spot

Tiles are slippery, especially when polished. That shiny kitchen splashback or shower wall probably has a gloss, polished finish, which will make your drill bit prone to wandering. To avoid this, place masking tape or painter’s tape over your drilling spot, then mark your centre point on the tape. The tape gives your drill bit extra grip and helps you start the hole exactly where you need it. A centre punch or tile hole locator can give you even more accuracy on those heavier-duty tasks.

3. Don’t Rush: Drill Slow & Steady

Speed is your enemy here. It’s like they always say: slow is smooth, and smooth is fast — well, faster than having to replace the tile, in any case. Set your drill to a low speed and avoid using hammer mode. Start at a slow pace, applying light pressure. Let the tile drill bit do the work; if you push too hard, you’ll risk cracking the tile. Gradually increase the speed only once the bit has broken through the glazed surface.

4. Keep Cool (You & the Tiles)

Friction creates heat, and heat can lead to broken tiles and dull, worn-out bits. Use a spray bottle with water to keep the area cool while you’re drilling. Alternatively, have a mate keep the bit cool by spraying water as you go. This is especially important when using drill bits and hole saws on hard porcelain or stone. Keeping the bit cool extends its life and improves the cut.

5. Match Your Drilling Technique to the Material

Not all tiles are created equal. Ceramic is easier to drill than porcelain or natural stone. For ultra-hard materials, use a diamond core bit with water cooling. If you’re working with large-format or thicker tiles, you may need to use a pilot drill bit first, then switch to a larger porcelain tile drill bit to widen the hole. This will often be the case for floor tiles or slate. No matter what you’re drilling, always match your technique to the material.

6. Support the Tile from Behind (If You Can)

We all need to feel supported — and so do tiles! If you’re working on loose tiles or drilling before installation, place a piece of timber or scrap board behind the tile. This gives support and helps prevent cracking. On walls, just be mindful of what’s behind the surface — electrical wiring or plumbing might be lurking back there.

7. Clean the Hole & Finish the Job

Once you’re through, clean out any dust and check the hole’s edge. If there are minor chips, a bit of fine-grit sandpaper or a diamond file can smooth things out. If you’re installing a fitting, make sure the hole is clean and dry before sealing or screwing in any hardware. Don’t forget to choose the right filler for the environment; grout, silicone caulk, or an epoxy filler might be needed, depending on where you’ve made the hole.

Ready to Drill Without the Drama?

Whether you’re a seasoned tiler or a hands-on DIYer, Tilers Online has the tools and advice to help you get the job done right. From premium tile drill bits, plus drill bits and hole saws, to electric tile cutters and trim, we’ve got you covered.

Browse tiling tools on our online store 24/7, or visit Tilers Online in Caringbah for expert advice, friendly service, and quality gear at prices that won’t blow your budget.