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Can You Regrout Tiles Over Existing Grout? Is It a Good Idea?

tile grout repair

When you notice that your bathroom tiles are getting a bit outdated, old, or discolored, you may find that old grout is the only thing that gives your bathroom a dirty feeling. No matter how much you clean your tiles or how strong the chemicals are, the grout will continue to become darker and more damaged.

If you want to avoid changing the entire tile surface or grouting the tiles from scratch, you can regrout your tiles over existing grout. It will actually create a stronger bond in the old grout, making it less susceptible to water. If you decide to regrout the existing grout, read the instructions below to finish this job correctly and effortlessly.

flooring dividerThe Importance of Grouting

Grouting work after tiling any outdoor or indoor space is an essential part of the project, as it protects, waterproofs, and adds aesthetic appeal to the room. The biggest benefit grouting has on a wall is protecting the wall from water damage, as water and humidity could easily seep through the tile seams. So, filling the seams with grout will create a waterproof barrier that will save your home a lot of time, expensive repair jobs, or remodeling.

removing old grout
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Can You Regrout Tiles Over Existing Grout?

Regrouting tiles on top of existing grout is not only possible but an excellent idea. If you notice your grout deteriorating, changing color, or losing waterproof properties, it is time to freshen your grout. While regrouting is possible, there are some things you may need to look out for. Regrouting is possible, sometimes even without removing the old grout first. You can use any tool that fits the width between tiles and scrape off any excess grout. Once you create clean and grout-free lines, you can begin to refill them in with new material. It is best to use epoxy grout to create the strongest possible bond.

Benefits of Regrouting

Regrouting is possible over old grout using the same grout as the first job. This will reduce the need for removing old grout and create a much stronger bond. The newly grouted wall will be much stronger and less susceptible to water damage. Using the same grout as the first time is essential to avoid creating a bond that is not as strong, resulting in the complete regrout in a few months. Once you create a strong and resistant adhesive between tiles, you will reduce the risk of water seeping through to the walls.

cleaning grout using brush
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How to Regrout Over Existing Grout

1. Remove a small portion of the old grout

With an oscillating tool that is designed for cutting away grout, begin removing a thin layer of grout. Work slowly, carefully, and without any force. It is essential to avoid chipping the tile, which is why it is best to use this tool with caution.


2. Vacuum and clean the tiles

Grout stain
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After removing any old grout lines that have been damaged, you should vacuum them out of any excess dirt or dust and clean the entire tile surface. This is a crucial step before regrouting, as the tiles and grout lines need to be entirely clean before applying a new adhesive.


3. Prepare the grout

Mix the required amount of grout in a bucket. To know the exact amount of water you need to use, it is best to read the instructions on the product. While stirring the blend of water and grout powder, make sure to avoid quick and sharp movements to reduce the number of bubbles in the material. The end mixture should have a dense, paste-like texture that is smooth and easy to pour.


4. Fill the grout joints

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Using a grout float, scoop a larger amount of grout and lay it over the tiles. Begin spreading it at a 45-degree angle, and change directions until all the grout lines are filled.


5. Remove excess grout

After finishing with the filling of grout joints, you can begin to clean the tile with a damp sponge. You should clean in any direction but horizontally, as it can lead to damaging the grout lines.

flooring dividerFinal Thoughts

After learning the correct way to regrout your bathroom tiles and provide them with a fresh and clean look, you can easily do so on your own. Regrouting over existing tiles is an easy project that won’t require removing the old grout entirely. You can clean up the surface and begin grouting on top. Once you are done, your bathroom tiles will look brand new and shiny.


Featured Image Credit: Alexey Stiop, Shutterstock

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