Grouting tile with small lines involves preparing the grout correctly, applying it effectively to fill the narrow gaps, and cleaning the surface properly. While the process is similar to grouting wider lines, using the right type of grout and ensuring it's thoroughly forced into the tight spaces is key.
Here’s a step-by-step guide based on standard practice, incorporating steps referenced from Mosa's guide on ensuring tight grout lines:
The Grouting Process
Successfully grouting tile with small lines requires careful execution of each stage, from mixing to final cleanup.
1. Prepare the Grout
The first step is crucial for achieving the right consistency, especially important when dealing with narrow gaps.
- Mix the grout: According to the reference, you should "Pour unsanded tile grout into a bucket and mix it with water, carefully following the instructions on the package." Unsanded grout is typically recommended for small grout lines (usually 1/8 inch or less) because the absence of sand allows it to penetrate and fill narrow joints more effectively without scratching the tile surface.
- Mix until the grout reaches a smooth, peanut-butter-like consistency.
2. Let the Grout Rest (Slake)
This step, noted as "Let the grout rest" in the reference, allows the water to fully hydrate the cementitious components of the grout.
- After initial mixing, let the grout mixture sit for about 5-10 minutes (check package instructions for the exact time).
- This resting period, known as slaking, improves the grout's workability and strength.
3. Re-Mix and Apply
After slaking, give the grout a brief re-mix before applying it to the tile surface.
- Scoop: As mentioned in the reference, "Scoop" the prepared grout onto the tile surface using a grout float.
- Spread: "Spread" the grout across the tiles, working it into the joints. Hold the float at a 45-degree angle to the tile surface.
4. Force Grout into the Lines
This is a critical step, especially for small lines, to ensure complete filling.
- Force the grout into the grout lines: The reference emphasizes this by stating, "Force the grout into the grout lines." Use the edge of the grout float to push the grout firmly into the narrow gaps, working in various directions (e.g., diagonally across the tiles) to ensure every part of the joint is filled without voids.
5. Scrape Off Excess Grout
Remove the bulk of the surplus grout from the tile surface.
- Scrape off excess: As per the reference, "Scrape off excess" grout from the tile surface. Hold the grout float almost perpendicular to the tile surface (at a high angle) and lightly skim it across the tiles diagonally. This technique removes excess material without pulling the grout out of the joints.
6. Apply More Grout (If Needed)
Inspect the grouted area for any thin spots or voids.
- Apply more grout: If you find any areas that were missed or not fully filled, the reference notes to "Apply more grout." Scoop a small amount onto the area and repeat the process of spreading and forcing it into the joints.
7. Let the Grout Rest (Before Cleaning)
Allow the grout to set slightly in the joints before beginning the cleaning process.
- Let the grout rest: The reference states again to "Let the grout rest." This second rest period allows the grout to stiffen in the joints, making it less likely to be wiped away during cleaning. The exact timing depends on humidity, temperature, and the specific grout product (usually 15-30 minutes).
8. Clean the Surface
Once the grout has firmed up, clean the tile surface.
- Using a damp (not soaking wet) grout sponge, wipe the tile surface with light pressure, working diagonally across the joints. Rinse the sponge frequently in clean water.
- Repeat this process until the tile surface is clean of grout haze.
- A final buffing with a clean, dry cloth may be needed after the grout has fully cured (check package instructions for cure time).
By carefully following these steps, paying close attention to using unsanded grout and ensuring it is firmly packed into the narrow lines, you can achieve a clean and durable finish.
