Flooring & Tiling · Bathroom
Regrout Bathroom Tiles
Repair summary
Cracked or mouldy grout lets water into the substrate. Rake out the old grout 2-3mm deep, vacuum the dust, mix new grout, and work it in diagonally with a rubber float. Wipe with a damp sponge before it sets.
Likely issue
Failed grout allowing moisture ingress
DIY difficulty
3/5
Estimated DIY cost
$50–$80
Estimated tradie cost
$400–$800
Tools required
- Grout saw
- Rubber float
- Sponge
- Bucket
Materials required
Step-by-step instructions
- Test a small area with a grout saw before tackling the full wall.
- Cracked or mouldy grout lets water into the substrate. Rake out the old grout 2-3mm deep, vacuum the dust, mix new grout, and work it in diagonally with a rubber float. Wipe with a damp sponge before it sets.
Safety warnings
If tiles are loose or you see wall movement, stop — there may be substrate damage. A waterproofing failure should be assessed by a licensed waterproofer.
When to call a tradie
Call a licensed tradie if the work is outside the scope of this guide, involves regulated trades (electrical, gas, structural, waterproofing), or if you discover hidden damage. A professional will typically charge $400–$800.
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