How to Regrout Shower Tile: A StepbyStep Guide

How to Regrout Shower Tile?

To regrout shower tile, start by removing the old grout using a grout removal tool.

Once the old grout is removed, choose an epoxy grout for regrouting.

Starlike epoxy grout from Litokol is a recommended option, as it offers a wide selection of colors and finishes.

This grout does not fade and has a consistent, long-lasting color.

To apply the new grout, mix it according to the manufacturer’s instructions and use a grout float to spread it evenly in the grout lines.

After applying the grout, wipe away any excess with a damp sponge.

Allow the grout to cure, and then seal it to protect it from moisture and dirt.

Key Points:

  • Remove old grout using a grout removal tool
  • Choose epoxy grout for regrouting
  • Starlike epoxy grout from Litokol is recommended for its color selection and durability
  • Mix the new grout according to the manufacturer’s instructions
  • Use a grout float to spread the new grout evenly in the grout lines
  • Wipe away excess grout with a damp sponge and allow it to cure before sealing it to protect it from moisture and dirt

Did You Know?

1. Did you know that the first recorded use of grout dates back to ancient Egypt, where it was commonly used in the construction of elaborate mosaics?
2. The average lifespan of grout is around 8-10 years, but with proper maintenance, it can last even longer, making it a durable and cost-effective choice for shower tile upkeep.
3. Ancient Romans developed a unique type of grout called “opus signinum,” which was made by mixing lime, water, and crushed tiles. This special blend of grout was employed in the construction of their famous bathhouses and thermal baths.
4. One little-known tip for regrouting shower tile is to ensure that the grout lines are thoroughly cleaned and dried before applying new grout. This prepping step helps to prevent the growth of mold and mildew over time.
5. While most grout is traditionally white or gray, there are now options available in various colors, allowing homeowners to customize their shower tile aesthetic. So, if you’re feeling adventurous, you can add a pop of color to your bathroom by selecting a vibrant grout hue!

Importance Of Grout In Tile Design

Grout plays a crucial role in tile design and installation. It not only enhances the overall aesthetic appeal of the tiled surface but also provides stability and durability to the tiles. Grout fills the gaps between the tiles, preventing water and other substances from seeping underneath and causing damage. Additionally, grout helps to hold the tiles in place, ensuring they remain firmly attached to the surface.

Furthermore, grout adds a decorative element to the tile design by allowing for different color options. With grout available in a wide variety of colors and textures, it can complement or contrast with the tiles, bringing out the desired visual effect. Whether you’re looking to create a modern, sleek look or a rustic, traditional feel, grout can significantly contribute to achieving your desired tile design.

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Signs That Regrouting Is Necessary

Over time, grout can deteriorate due to factors such as insufficient sealing, exposure to harsh cleaning chemicals, excessive moisture, or general wear and tear. The following signs indicate that regrouting may be necessary:

  • Cracked or crumbling grout: If you notice cracks or crumbles in the grout lines, it’s a clear indication that the grout has weakened and needs to be replaced. These cracks can allow moisture to penetrate the underlying surface, potentially leading to structural damage.

  • Discoloration and staining: Grout is porous and prone to absorbing liquids and dirt. Over time, this can result in discoloration and staining that cannot be removed by regular cleaning. If your grout has lost its original color or appears significantly darker or stained, it’s time to regrout.

  • Mold and mildew growth: Moisture and humidity in the bathroom provide the perfect breeding ground for mold and mildew. If you find mold or mildew growing on the grout lines despite regular cleaning, it indicates that the grout is not effectively sealing the gaps, and regrouting is necessary to prevent further mold growth.

The Porous Nature Of Cement Grout

Cement grout, the traditional choice for tile installation, is composed of cement, sand, and water. However, it is important to note its porous nature. This means that cement grout can absorb moisture and dirt, making it more susceptible to staining and discoloration over time. Furthermore, the porosity of cement grout can allow moisture to penetrate the underlying tiles and the substrate, potentially causing more significant damage.

To combat the porous nature of cement grout, regular sealing is essential. Sealing creates a protective barrier, preventing liquids and dirt from penetrating the grout and making cleaning easier. However, if the initial grout sealing was not performed correctly or has worn off over time, regrouting may be necessary to ensure proper protection and longevity of the tiled surface.


  • Cement grout is composed of cement, sand, and water.
  • It is porous and can absorb moisture and dirt, leading to staining and discoloration.
  • The porosity of cement grout allows moisture to penetrate the underlying tiles and substrate, potentially causing damage.
  • Regular sealing is necessary to create a protective barrier and facilitate easier cleaning.
  • If the initial grout sealing was not done correctly or has worn off, regrouting may be required.

Simple Steps For Regrouting Over Existing Grout

Regrouting a shower tile is a straightforward process that can be done over existing grout. Below is a step-by-step guide on how to regrout your shower tiles:

  • Prepare the area: Thoroughly clean the existing grout lines using a grout cleaner and a stiff brush. Remove any loose or damaged grout.

  • Choose the right grout: Select a high-quality grout product for regrouting. Starlike epoxy grout is an excellent choice due to its strength, durability, and wide range of available colors and finishes.

  • Apply the new grout: Mix the epoxy grout according to the manufacturer’s instructions. Using a grout float, apply the grout to the tile surface, ensuring to fill the gaps completely. Smooth the grout lines with the float at a 45-degree angle, removing any excess grout.

  • Clean the tiles: Wipe away excess grout from the tile surface using a damp sponge. Rinse the sponge frequently and continue cleaning until the tiles are free from grout residue.

  • Final cleaning and curing: After approximately 30 minutes, use a clean, dry cloth to gently polish the tiles and remove any remaining haze. Allow the grout to cure for at least 24 hours before exposing it to water or heavy traffic.

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Advantages Of Epoxy Grout For Re-Grouting

When it comes to regrouting shower tiles, epoxy grout is a popular and advantageous choice. Here are some key advantages of using epoxy grout:

  1. Durability and resistance: Epoxy grout is highly resistant to water, stains, chemicals, and mold. Unlike cement grout, epoxy grout does not absorb moisture or dirt, making it less prone to discoloration and staining. It provides a strong, long-lasting bond that can withstand the harsh bathroom environment.

  2. Color consistency: Epoxy grout, particularly Starlike epoxy grout from Litokol, offers a consistent, long-lasting color that does not fade over time. This ensures that your regrouted shower tiles will maintain their original aesthetic appeal for years to come.

  3. Wide selection of colors and finishes: Litokol’s Starlike epoxy grout comes in a vast range of colors and finishes, allowing you to choose the perfect match or contrast for your tile design. Whether you prefer a classic white or a bold, vibrant hue, you will find a color to suit your preference.

  4. Epoxy grout is highly resistant to water, stains, chemicals, and mold.

  5. Epoxy grout does not absorb moisture or dirt, making it less prone to discoloration and staining.
  6. Starlike epoxy grout from Litokol offers consistent, long-lasting color that does not fade over time.
  7. Starlike epoxy grout comes in a vast range of colors and finishes.
  8. Choose the perfect match or contrast for your tile design.

Using The Right Tools For Grout Removal

Before applying new grout, it is essential to remove the old grout properly. This process requires the use of a grout removal tool, which could be a manual grout saw or an electric grout removal tool.

  • Manual grout saw: A manual grout saw consists of a small handle with a blade designed specifically for grout removal. It requires manual effort and is suitable for smaller areas or for those who prefer a hands-on approach.

  • Electric grout removal tool: An electric grout removal tool is a powered tool that rapidly oscillates or vibrates a carbide tip, removing grout quickly and efficiently. This tool is ideal for larger areas or if you have a significant amount of grout to remove.

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Regardless of the tool chosen, it is crucial to follow the manufacturer’s instructions carefully and exercise caution during the grout removal process to avoid damaging the tiles. Taking the time to remove the old grout thoroughly will ensure a clean and smooth surface for regrouting.

Frequently Asked Questions

Can you put new grout over old grout in a shower?

Yes, it is possible to apply new grout over old grout in a shower. By using a grout removal tool to carefully remove the old grout to a depth of at least 2mm, you create a suitable surface for the new grout to adhere to. This allows for a fresh application of grout, restoring the appearance and durability of the shower area.

Do you have to remove old tile grout before regrouting?

While it is not necessary to remove all of the existing grout before regrouting, it is important to remove most of it in order for the new layer to properly bond with the tile. Removing all of the old grout can be time-consuming and often unnecessary. By focusing on removing most of the grout, you can ensure a strong bond between the new grout and the sides of the tiles, rather than the surface.

How long should grout last in a shower?

The longevity of grout in a shower depends on various factors. Properly maintained and treated showers can expect grout to last between eight and sixteen years. Consistent cleaning and sealing can significantly extend its lifespan. However, neglecting regular maintenance or subjecting the grout to harsh chemicals and abrasive cleaners can cause deterioration and shorten its lifespan. Therefore, it is essential to practice good shower maintenance habits to maximize the lifespan of the grout and ensure a well-maintained shower for years to come.

How often should I Regrout my shower?

To maintain the integrity of your shower and prevent issues such as cracked tiles, it is advised to regrout every six months. Moisture and water contact gradually wear down the grout, so regular regrouting will help keep your shower tiles looking fresh and extend their lifespan. This simple and cost-effective solution will promptly restore your bathroom’s former radiance.

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