Grouting floor tiles: a practical step-by-step guide

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nce your floor tiles have been installed, it is time to finish the grout joints. Grouting floor tiles not only provides a neat finish but also contributes to a durable tiled surface.

But how do you grout floor tiles, and how long should you wait after installing them? In this step-by-step guide, we explain which materials you need, how to choose the right grout and how to apply the grout, remove excess material and clean the tiles.

What do you need to grout floor tiles?

Before you start, make sure you have the right materials and tools at hand. To grout floor tiles, you will generally need:

• Mixing bucket
• Grout
• Water
• Grout float
• Rubber squeegee
• Sponge float
• Mixing paddle
• A slow-speed electric mixer

Which grout do you need?

Not every grout is suitable for every tiled floor. The grout you need depends on factors such as the grout joint width, type of tile, application and load on the floor.

A tiled bathroom floor, for example, may have different requirements from a terrace, garage or other heavily loaded floor. For outdoor applications, the grout must be suitable for the conditions to which the tiled surface will be exposed, such as moisture, frost and temperature fluctuations. With underfloor heating, it is also important to use a grout that is suitable for this application.

There are several types of grouting materials. Common options include:

• Cement-based grout: widely used for grouting ceramic wall and floor tiles and available for different joint widths and applications.
• Epoxy grout: offers high resistance to moisture, dirt and chemicals and is therefore used, among other applications, where high levels of hygiene or chemical resistance are required. Its application differs from that of cement-based grout.
• Ready-to-use grouts: depending on the product, suitable for specific applications and substrates.

Always check the manufacturer’s technical specifications and choose a grout that is suitable for your tiles, grout joint width and application.

How to grout floor tiles: step-by-step guide

Step 1: How long should you wait before grouting after tiling?

Do not start grouting immediately after installing the tiles. The tile adhesive must have cured sufficiently before you finish the grout joints. How long you need to wait depends on the tile adhesive used, the substrate, tile size and drying conditions. Always follow the drying time specified by the tile adhesive manufacturer.

Step 2: Clean out the grout joints

Before grouting, check that there is no tile adhesive, dust or dirt between the floor tiles. Remove any adhesive residue and clean the joints thoroughly. This allows the grout to be applied evenly and prevents dirt or adhesive residue from affecting the final result.

Important: movement joints and perimeter joints are not finished in the same way as standard grout joints. Follow the requirements for the relevant floor construction and application.

Step 3: Mix the grout

Prepare the grout according to the mixing ratio and instructions on the packaging. Use a suitable mixer and mixing paddle, and mix until you achieve a homogeneous, lump-free consistency.

Tip: Do not add extra water to make the grout easier to work with unless instructed to do so. An incorrect water ratio can affect the properties, curing and final colour of the grout.

Step 4: Apply the grout

Apply the prepared grout to the tiled floor using a grout float. Work diagonally across the grout joints and press the grout firmly into the gaps so that the joints are completely filled. Work on a manageable area at a time and take the working time of the grout into account.

Tip: Do not prepare more grout than you can use within the specified working time.

Step 5: Clean the floor tiles

Once the grout has firmed up sufficiently, clean the tiled surface with a damp sponge float. Work with gentle, diagonal movements and rinse the sponge regularly in clean water. Avoid using too much water, as this can affect the fresh grout. Always follow the grout manufacturer’s instructions regarding the correct time to start cleaning.

Step 6: Allow the grout to cure

After grouting, the grout needs time to cure completely. Avoid putting the tiled floor under load or cleaning it intensively too soon. The exact drying and curing time varies depending on the product. Always refer to the packaging or technical data sheet of the grout used.

Grouting floor tiles for a durable finish

Successfully grouting floor tiles mainly requires good preparation, the right grout and the right tools. Allow the tile adhesive to dry sufficiently, clean out the grout joints thoroughly, work the grout diagonally into the joints and clean the tiles at the right time.

Looking for professional tools for installing and grouting tiles? Discover Levelit’s range of tiling tools.