Among the many different applications involved using a Multi-Tool, removal of old and discoloured grout is definitely one of them. Over the past ten years is has now become common place for tradesmen to use carbide and diamond tip blades for this purpose.

There are many factors to consider when removing grout. Some factors include the width of the grout line and the hardness of the grout. Various multi tool blades come in varying degrees of thickness and coarseness. For instance, a thicker set blade will not fit in a 2mm grout line. Also, a course blade would not be suitable for re-grouting where brittle ceramic tiles are installed. In this case you would be advised to use a fine edged diamond blade.

Using the correct blade can make the difference. Incorrect choice can result in chipped or even cracked tiles.

It certainly requires a steady hand to re-grout, especially with more fragile tiles. One slip can result in unsightly scratch.  Porcelain tiles tend to cope better with this type of accident. However, it really does depend on the individual batch of tiles. Professional re-grouters, sometimes, will not know until they start removing grout. 

If you plan on trying some re-grouting here are a few important tips you should follow:

  • Always wear a breathing mask. Grout dust is very bad for you.
  • Always wear ear protection. Multi-tools are very noisy. Potential hearing damage is very real especially in a small space such as a shower recess.
  • Ventilate the area as much as possible.
  • Wear gloves and eye protection.
  • Knee pads are handy if you’re doing a larger area.
  • Have a vacuum handy to clean up excess dust.
  • Never cut through wet grout. It makes a mess that is more difficult to clean up.
  • Never cut to deep. Usually, but not always, it’s best to cut to a depth that is approximately equal in width to that of the grout line. Cutting too deep is unnecessary and can result in damage to waterproofing membranes in bathrooms. Be aware of underfloor heating as well.
  • Don’t put too much weight on the Multitool. You’ll just burn out the motor. Sometimes hard grout will take some patience to remove.

When you’ve removed all the grout and are ready to install you new grout there are a few simple tips below you might want to follow.

  • Make sure the area is clean.
  • When mixing your new grout it is advisable to use a grout booster. Follow the directions precisely. Never use cheap brands, they can lead to discolouration. Use a booster that is the same brand as your grout.
  • After grout installations, proper clean up is essential. Use the minimum amount of water possible. Too much water can cause new grout to discolour and even crack.
  • Never grout in conditions over 35 Degrees Celsius  and avoid grouting on hot tiles.
  • Do not grout in the area is wet.
  • Avoid grouting when the area might be exposed to water before the grout can cure.

We hope this is a helpful guide to get you started with your re-grouting project.

Multi tool blades are a great tool for re-grouting purposes. Take a look at our selection carbide and diamond multi tool blades.

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