To restore the bathroom, a few small jobs need to be planned. Changing a bathroom sink yourself and faucets, repainting the walls and floor covering, there are many tasks that can prove useful.
When the tiles age, it is important to give them a new shape adapted to current needs. With the help of a tiler and a tile setter, the installation of materials is a success.
To ensure their longevity, grouting tiles is an interesting idea. To go further on the subject, this article provides important explanations to remember.
📋 Key points: Personally, I consider that the quality of grouting represents 50% of the final waterproofing of your floor. For me, it is the finishing step that transforms a raw site into a durable professional result. By using a waterproof mortar, you ensure protection for more than 15 years against infiltration and mold.
What is tile grouting?
🌟 Strengths:
– Perfect waterproofing
– Aesthetic finish
– Protection of tiles
🔍 Drawbacks:
– Long installation time
– Tedious cleaning
– Sensitive to water dosage
The term grouting derives from the verb to grout. Studied closely, grouting tiles indicates an action that holds the tiles together using a grouting mortar.
Following tile installation comes the grouting of tiles. According to the DTU or Unified Technical Document, this operation is mandatory.
If the kitchen or bathroom floor covering lacks tile grout, temperature variations may cause strong pressure. This phenomenon then causes the tiles to come off. Tile grout is thus required for safety reasons.
According to specialists, its normal width is 4 mm, depending on the type of tile. But if you want to give it a retro style, you can make a thicker tile grout.
For rectified edge tiles, it is better to choose a finer tile grout width of 2 mm. Grouting thus makes the floor covering of your kitchen or bathroom more chic and elegant.
Bathroom tile grout plays countless roles. It protects the tiles from mold and dirt. That’s not all, it compensates for their irregularities. With nicely colored grouting mortar, it brings unmatched charm to the surface.
📍 My experience: When installing my kitchen tiles in 2025, I made the mistake of cleaning the grout too late, after 2 hours of drying. I had to use a strong acid stripper to remove the cement haze. The lesson learned: smoothing with a damp sponge must imperatively be done 15 to 20 minutes after application for a perfect finish.
Moreover, the installation of tile joints ensures the waterproofing of the floor covering. Since they are waterproof, they protect the tiles from moisture and water. Grouting tiles is therefore an effective way to extend the lifespan of the floor covering in your bathroom.
Which materials are recommended for grouting?
One can find countless different materials for bathroom tile grout. Each element has its own specificities to meet all needs. You can make your choice based on your tastes and requirements.
If you plan to use it on a surface likely to shrink or expand, opt for products whose formulation includes elastomers. These provide a certain elasticity to outdoor tiles or other deformable surfaces.
For floor and wall tiles in a humid room, water-repellent joints are the best choice. They optimize the material’s resistance to water.
Similarly, resin or epoxy tile grout is perfect for the kitchen and bathroom. It tolerates chemical agents and humidity. This product is also suitable for pool coverings.
If you focus on the aesthetic aspect, colored tile joints will suit you perfectly. The dosage is done according to the desired shade. For hassle-free use, the tile joint width should be extra fine.
| Type of joint | Ideal use | Moisture resistance | Difficulty of installation |
|---|---|---|---|
| Cement mortar | Dry rooms / floors | Medium | Easy |
| Epoxy joint | Showers / kitchens | Maximum | Difficult |
| Ready-to-use joint | Small surfaces | Good | Very easy |
How long should the joints be left to dry?
Before answering this question, it is important to summarize the steps for tile jointing. First, prepare the joint mortar by mixing the powder with water. Be sure to respect the dosage carefully to avoid mistakes.
Using a trowel, spread a layer of mortar over the tiles, paying particular attention to the joints. To smooth it, you can use a rubber squeegee. It is advisable to work diagonally relative to the tiles.
The drying time of tile joints occurs in 2 phases. First, wait 30 to 45 minutes after application.
A temperature above 20 °C accelerates the hardening of the grouting mortar. Once done, clean the joint with a damp sponge without pressing to avoid digging it out.
The second step is to wait at least 24 hours for the material to dry completely. Once this is achieved, wipe the surface with a dry, clean cloth to remove joint traces. Then the floor can be opened to pedestrian traffic.
How to choose the color of tile joints?
Dirty tile joints harm the overall appearance of the tiles. To ensure their aesthetics, the selection of their shade should not be taken lightly. Like flexible floors and coverings, they come in a number of colors.
If traditional products are sometimes beige, gray, and white, they can get dirty more quickly. However, whitening tile grout takes a lot of time. You scrub the grout with a brush from time to time.
🌍 Did you know? Tile grout is not just for aesthetics. It absorbs the micro-movements of the building, thus preventing your tiles from cracking under the pressure of temperature variations.
Know that black and brown tile grout products are available on the market. Even though they do not require more frequent cleaning, their dark shade may create a gloomy atmosphere in the kitchen or bathroom.
If you wish to choose them, try to create a contrast with light-colored wall paint and furniture. They bring light and energy into the home.
Besides that, you can find tile grout in warm shades like yellow, pink, and red on the market. They are perfect for providing a feeling of optimism to the room. As for blue and green, these colors evoke relaxation and calm.
Whatever your choice, the important thing is to decide on a shade that matches the decoration style and the atmosphere you want to create. Generally, it is recommended to favor a shade close to the color of the tiles.
If the latter imitates wood flooring, brown tile grout works well. For white or beige tiles, opt for products of the same color. As for stone or gray floor or wall tiles, choose grout in a slightly light gray.
Calculez la quantité de joint nécessaire (basé sur un carreau standard 30×30 cm) :
How to clean excess grout mortar?
Do you want to restore the original shine of your floor covering? Cleaning is an essential step. Dirty tile grout is not pleasant to look at.
💡 Tip: To clean cement haze without damaging fresh grout, use a barely damp sponge and change your bucket water very regularly. A final pass with a dry microfiber cloth will remove the last white traces.
Also, during tile installation, grouting often leaves residues of grout mortar. Fortunately, it is easy to get rid of them.
It should be noted that many natural or chemical products are available to make bathroom tiles shine. White vinegar is one of them.
To use it, mix it with a small amount of water. The next step is to soak a cloth with this product and wipe the surface. Then rinse with clear water and let the surface dry.
Besides white vinegar, the cement haze remover is designed to eliminate unwanted excess tile grout. First, spread it on the floor. Then gently scrub the grout with a brush. That said, let the solution act and finish the operation by rinsing with water.
If the stains seem stubborn, you can use a chemical product like hydrochloric acid. It is very effective for whitening tile grout.
But before using it, remember to protect your hands with household gloves. Do not forget that this solution can be harsh on the skin.
Because of this characteristic, it must be mixed with water in a reasonable proportion. Once this step is completed, soak a brush or sponge with this mixture. You scrub the joints with the brush and finish the cleaning with a rinse of clear water.
⚠️ Common mistake: Making a mixture that is too liquid. A mortar too rich in water will lose its mechanical strength when drying, which will cause cracks and premature crumbling of the joints.
What is the ideal width for joints between tiles?
The Technical Specifications Notebooks or CPU and the Unified Technical Document or DTU have set standards for the tile joint width. It varies depending on the tile installation, its type, and its dimensions.
The size of the floor tile joint is different from that of a wall tile. It is not the same for indoor and outdoor installation either.
If you plan to apply grout for a wall covering in the kitchen or bathroom, the ideal tile joint width is 4 mm. And for rectified edge tiles, 2 mm is the minimum size.
And when it comes to an outdoor floor covering, opt for a width of 5 mm. Despite these standards, it is still possible to make thick joints. However, if you are looking for modernity, nothing beats a thin tile joint.
How to prevent mold on tile joints?
Although it seems easy to clean mold on walls, this is not the case for tile joints in the kitchen or bathroom.
It should be recalled that these fungi are unpleasant to see. Worse yet, they are dangerous to health. With their production of mycotoxins, they cause allergic reactions. To avoid this kind of situation, it is essential to prevent their appearance.
Mold prefers to develop in cracked tile joints. To prevent its invasion, it is imperative to replace them once and for all.
With new grouting, be sure to take care of it regularly. You should clean and whiten floor tile joints at least once a month using a neutral pH product. This also helps to restore their original shine.
And during their installation, it is recommended to use a sealer, preferably latex-based. It mainly serves to protect the tiles from mold.
Indeed, this product can often be expensive. However, it is very cost-effective for keeping your bathroom tiles always in good condition and free from mold for a very long time.
Are there specific products for grouting outdoor tiles?
Compared to bathroom tile grout, outdoor grout requires particularly strong and robust products.
Since they are installed outside the house, they must withstand climatic conditions such as humidity, frost, rain, wind, and even sun for a long time.
Tile joints must have high resistance to standing water as well as temperature variations. They are easy to find in stores. Their packaging clearly indicates that they are specially designed for outdoor use.
When you have made the right choice, know that this product also helps guarantee the lifespan of the tiles. The double gluing method is highly recommended to ensure its durability.
Whether it is the floor tile grout or exterior wall tile grout, the powder tile grout mortar is a better option. Besides its ease of application, it is valued for its resistance to weather conditions.
