Waterproofing Already Fitted Tiles in Your Bathroom

When it comes to bathroom waterproofing, it's often best to plan ahead and apply waterproofing membranes before laying tiles. However, what if you've already got tiles installed and now you need to protect them from water damage? Here's how you can waterproof already fitted tiles through a series of careful steps and techniques.

Steps to Waterproof Already Fitted Tiles

1. Clean the Surface

A thorough cleaning is essential for effective waterproofing. Remove all dirt, soap scum, and any mold or mildew from the tiles. Use appropriate cleaning agents suitable for the type of tiles and grout you have.

2. Inspect for Damage

Check for any cracks or loose tiles that might need repair. Address any structural issues before applying waterproofing materials. Cracked tiles can be a significant entry point for water, making them more vulnerable.

3. Choose the Right Product

Use a waterproofing membrane or liquid waterproofing product specifically designed for use over existing tiles. Ensure the product is compatible with your tile and grout type. It should be able to create a robust barrier to water penetration.

4. Apply the Waterproofing Layer

Follow the manufacturer's instructions for application. Typically, this involves applying a primer followed by one or more coats of the waterproofing membrane. Ensure even coverage and allow for proper drying between coats.

5. Seal Grout Lines

Pay special attention to the grout lines, as they are common areas for water infiltration. Some waterproofing products may come with a specific grout sealer. Thoroughly clean the grout lines and apply the sealer as recommended.

6. Allow Curing Time

Allow sufficient time for the waterproofing material to cure properly before using the bathroom. According to most manufacturers, this can range from 24 to 48 hours. Follow the specific instructions provided for the product you are using.

7. Regular Maintenance

Inspect the waterproofing periodically and reapply as necessary to maintain its effectiveness. Regular maintenance helps prolong the life of your tiles and substrate.

Alternative Solutions: Sealing Grout Lines and Painting Walls

While a full waterproofing membrane is highly recommended, there are alternative methods to protect your already fitted tiles:

Sealing Grout Lines

For impervious tiles, sealing the grout lines with an effective sealant can be sufficient. To do this:

Cut the grout joints using a dustless diamond cutting wheel on a grinder. Clean the grout lines thoroughly. Apply an ASTM C920 sealant caulking. Ensure the sealant covers the entire perimeter of the tiles.

Note: Ensure the sealant is compatible with your tile and grout.

Painting with a Liquid Rubber Membrane

To create a sealed area that prevents water penetration, you can paint the walls using a liquid rubber membrane. This method involves:

Sealing the edges and corners using a polyester fabric bandage. Painting a layer under the edges to ensure the waterproofing membrane soaks up water effectively and adheres well to the wall or floor. Painting the waterproofing membrane across the walls and floors using a roller. Typically, two coats are applied: the first coat vertically and the second horizontally.

The liquid rubber membrane creates a barrier that makes your tiles fully waterproof while maintaining the appearance and structural integrity of the tiles and grout.

Conclusion

The best way to waterproof your bathroom is when construction is taking place, as you can layer the waterproofing membrane effectively then. If you have tiles already installed, focus on making the area water-resistant through careful preparation and application of waterproofing materials. By following the steps outlined above, you can significantly enhance the protection of your tiles and substrates from water damage.

Keywords: Waterproofing Tiles, Bathroom Waterproofing, Sealing Tiles, Grout Sealer