A Guide To Bathroom Waterproofing Under Tiles

By Author: Itile Bathrooms NT
Total Articles: 3
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Tiling improves the artistic appeal of many rooms’ floors and walls. However, it is necessary to take precautions to prevent the tiles from deteriorating over time. This is especially in wet or moisture-prone areas like the bathroom. Water and moisture that seep into the wall or floor can increase the probability of molting. This can then damage the construction over time. Before tiling, both wall and floor substrate must be waterproofed.

It is advisable to consult an expert tiling contractor, such as the Itile bathrooms NT team, to evaluate the issue or damage to waterproofing tiles. They will be able to identify if the issue is similar to failed waterproofing or cracked grout. If the waterproofing system fails, it is recommended to remove the tiles and begin the waterproofing and tiling procedure over.

Is it possible to waterproof over the bathroom tile?

Definitely, the answer to that is yes. It is possible to waterproof and tile over existing tiles. However, the existing tiles must be in excellent condition and securely attached to the substrate. Ensure that the tiles are not cracked, loose, or hollow-sounding. ...
... Moreover, make sure that the current floor level allows a height increase, particularly near door entrances.

How does bathroom waterproofing work?

Waterproof the substrate with a waterproofing compound like Tradies Choice WPM, a Grey Class III fibre reinforced water based polyurethane membrane that has been designed for a range of waterproofing applications for under Tile.

Step 1: Priming

The substrate must be in good shape, clean, and dry. After checking the substrate use Tradies Choice WPM. This product is appropriate for wet areas, balconies, and deck areas that will be tiled and not left exposed. Outstanding adhesion to concrete, masonry, renders, internal cement sheeting, and plasterboard sheeting. Then apply Tradies Choice Master Primer, a fast-drying water-based acrylic primer, which should be used on rough, porous surfaces.

Step 2: Application

For waterproofing, use Tradies Choice WPM this is a fast drying two component waterproof membrane that is suitable for a wide range of waterproofing applications.

Tradies Choice WPM should be tested on a small section of tile and grout to assess any potential discoloration.
The application should begin at the top of the structure and work its way down. Tradies Choice WPM should be carefully applied under tiles and grout. Finish by installing the bathroom base. Tradies Choice WPM should be properly applied to every surface.
Give at least 15 minutes for its first application to take effect before repeating the procedure throughout the entire area.
Require at least 15 minutes for the second application to penetrate before wiping away any excess on the tile surface with a dry cloth.
Allow Tradies Choice WPM to dry for 24 hours before showering.
Step 3: Drying Time

After the second application, let the Tradies Choice WPM to dry for at least 15 minutes before polishing off the surface with a clean soft cloth. Allow at least 24 hours before using it.

Guaranteed Bathroom Workmanship

Waterproofing over old tiles is a specialised job. We do not recommend to have it as a DIY project. To have the advantage of a guarantee, we highly recommend hiring Itile Bathrooms’ professional team.

We have over 20 years of tiling and waterproofing expertise and have been serving Darwin, Palmerston, and Humpty Doo. Itile Bathrooms NT is a licensed tiler and waterproofer of walls and floors.

Our team can handle full bathroom renovations, including tile demolition, waterproofing, tiling, and plumbing, as well as remedial waterproofing. You can be confident that our years of experience will meet all of your remedial waterproofing needs, including leaky balconies, showers, and tile-free bathrooms. Contact us today and let us know how we can help you.