How to remove grout

Grout is essential for binding tiles together, preventing moisture infiltration and improving the overall aesthetics of tiled surfaces, but over time, it can become mouldy, discoloured and cracked.

Whether you’re looking to fit new tiles, remove mould or simply refresh your grout, knowing how to remove the old grout can help complete this potentially tricky task to a high standard.

In this article, we discuss how to remove grout, covering the supplies you’ll need, how to do it using various approaches and how to re-grout if you need to.

How to remove grout

Here’s how to remove old grout:

Step one: Select your tool

You can remove grout using a range of tools, like a grout saw, utility knife, an oscillating tool with a grout-removal blade or a rotary tool, like a Dremel, with a suitable attachment.

Utility knifes and grout saws are good for intricate areas, but the blades might dull and become difficult to use. These are best reserved for small areas.

Electric tools are typically best to use, as they’ll get the job done quickly.

Step two: Using a manual grout saw or utility knife

If you decide to use a utility knife or saw, be sure to hold the tool at a 45-degree angle to the tile.

Applying consistent pressure, move the bladed edge back and forth in a sawing motion to cut through the grout.

Be careful not to scratch the surrounding tiles.

Step three: Using an electric tool

If you’re using a power tool, fit the grout removal blade or another appropriate attachment. Set the tool to a low-to-medium speed to begin with.

Without applying too much pressure, touch the blade against the grout and guide it where you need it to go, allowing it to do the work.

Be very careful around the edges, as power tools can easily cause chipping in these areas. It’s a good idea to use a manual tool here to be safe.

As you’re working, continuously brush or blow away the dust and debris that accumulates, as this helps you see your progress.

Step four: Inspect

Once you’ve removed the grout, inspect your work to make sure there are no missed spots or areas where the grout is still too deep.

For new grout to adhere properly, you need to remove enough of the old grout in each section.

Step five: Re-grout

If you’re replacing the old grout with new grout, simply follow the manufacturer’s instructions and press it into the spaces between the tiles using a rubber float.

Wipe away any excess grout with a damp sponge and allow it to cure for the specified duration before exposing it to any moisture.

Step six: Clean up

Finally, get rid of the old grout and debris, clean the work area and your tools, pack everything away and you’re finished!

If you don’t have the time or equipment to complete this job yourself, don’t hesitate to contact to a Checkatrade-approved expert for support.

Simply enter your postcode into the search box below to connect with the most highly reviewed experts near you!

How to remove mould from grout

Mould is a common problem in damp areas, like bathrooms and tiles behind the kitchen sink. Follow these steps to resolve the problem:

Step one: Preparation

Before you start, take any necessary safety precautions, such as wearing gloves and goggles and making sure the area is well ventilated.

Step two: Try natural cleaners

Natural cleaners are less harsh on your grout and tiles, but they’re only effective against mild cases of mould.

The two most commonly used natural cleaners for mould removal are vinegar and baking soda.

When using vinegar, fill a spray bottle with it and apply it directly to the mouldy grout. Let it sit for a few hours and then scrub it with a brush, rinsing it with warm water afterwards.

When using baking soda, create a paste by mixing it with a few drops of water and apply it to the mouldy grout. Let it sit for a few hours and scrub it with a stiff brush. Rinse it with warm water afterwards.

Step three: Commercial mould removers

If the natural cleaning solutions don’t work, you might need to purchase a commercial mould remover and try again. Always follow the manufacturer’s instructions when using these.

Step four: Bleach

Diluted bleach is another household chemical you can try, but it’s much harsher than the natural cleaners, and it can also potentially damage coloured grout.

If you want to try this method, mix one part bleach with four parts water in a spray bottle.

Spray it directly onto the mould and let it sit for about 10 minutes.

Finally, scrub away the mould with a brush and rinse the area with warm water.

Step five: Scrub, rinse and dry

Regardless of which cleaning solution you use, once you’re finished applying it, you need to thoroughly scrub and rinse the grout lines to remove any debris and cleaning residue.

Use a cloth, towel or even a fan to ensure the grout is completely dry, as this will help prevent the mould from returning.

Step six: Take preventative measures

Here are some tips to help you prevent future mould growth on your grout:

• Seal the grout with a high-quality sealer
• Improve ventilation in the area
• Regularly clean the area

How to remove dried grout from tile surface

Removing dried grout from the surface of tiles can be challenging, especially if the grout has cured for a while. Although, with patience and the right techniques, it’s often doable. Here are the steps to follow:

Step one: Try a mild solution first

If you recently spilled grout on the tiles, you should be able to remove it using a mild solution, or even warm water and a damp cloth.

If warm water alone fails, try mixing a few drops of washing up liquid into it and try again. The soap should loosen the grout and make it easier to wipe away.

Step two: White vinegar solution (for not fully cured grout)

The second technique you can try involved mixing equal parts white vinegar and water in a spray bottle. Apply it to the grout and wait for about 15 minutes before scrubbing.

Rinse the tile with warm water and let it dry.

Step three: Rubber grout float

If the grout stain persists, you might be able to scrape it away with a rubber grout float, which won’t scratch the tiles due to its material.

Hold the grout float at a 45-degree angle to the tile and scrape away the grout.

Step four: Scraper

For thicker spots of dried grout, you can use a wooden or plastic scraper. These can potentially scratch the tiles, so be careful when using these tools.

Step five: Commercial grout haze remover

Commercial grout haze removers, such as Floorseal’s Cement and Grout Haze Remover, can come in handy if the milder solutions aren’t working.

Simply follow the manufacturer’s instructions when applying these.

Step six: Pumice stone

For very stubborn grout residue, you can gently rub a pumice stone over the tile to grind it away. Be sure to keep the pumice stone wet to minimise damage to the tiles.

Step seven: Clean the tiles

Once the grout is removed, use warm water to thoroughly rinse the tiles. Dry them with a clean cloth afterwards to prevent water spots.

Remember, if you need any help removing or replacing grout, get in touch with a highly reviewed local expert by entering your postcode into the search box below.