Installation of Tile on a Plastic Shower Base

Quck answer

To install tile on a plastic shower base, follow these steps:

1. Prepare the surface: Clean the plastic base thoroughly and ensure it is dry. Remove any existing caulk or sealant.

2. Apply primer: Use a tile primer specifically designed for plastic surfaces. Apply it evenly on the base and let it dry completely.

3. Plan the layout: Measure and mark the center of the base. Use a chalk line to create guidelines for the tile installation.

4. Apply thinset mortar: Spread a layer of thinset mortar on a small section of the base using a notched trowel.

5. Set the tiles: Press the tiles into the mortar, following the guidelines. Use spacers to maintain even spacing between the tiles.

6. Grout the tiles: After the mortar has dried, remove the spacers and apply grout between the tiles using a grout float. Wipe off excess grout.

7. Seal the grout: Allow the grout to cure, then apply a grout sealer to protect it from moisture and stains.

8. Clean up: Remove any remaining grout haze with a damp sponge.

9. Enjoy your tiled shower base!


Tile is an attractive material for a shower base. In addition to its appealing appearance, tiles are highly durable and long-lasting when installed correctly. To save money, you might consider installing tile on a plastic shower base. However, installing tile over a plastic shower pan can be more challenging than it appears.

Flexible Plastic Shower Pans

The main issue when attempting to install tiles on a plastic shower pan is the flexibility of the base. A plastic base cannot adequately support the mortar bed required for tile adhesion. Once pressure is applied to the shower base through use, the mortar is likely to crack.

Cracked mortar will result in cracked or loose tiles. While tiling over an existing shower base may seem like a quick solution to enhance the appearance of your shower, it is better to take a longer approach to achieve a functional and attractive outcome.

Challenges with Thinset Mortar

Another challenge you may encounter when trying to install tiles over a plastic shower pan is getting the mortar to adhere. Many thinset mortars are unable to stick to a plastic shower pan. The surface is too smooth, and no matter how much you sand it, it is not designed to bond with mortar.

If you do wish to install tile on an existing shower base, you will need to change the backing material. Fortunately, there are Tile Redi shower pans available on the market. They are specifically designed for this purpose. Using a Tile Redi shower pan ensures that you can tile over your shower base and achieve a functional and aesthetically pleasing result.

The Tile Redi Shower Base

Tile Redi shower pans are designed to replace plastic shower trays and serve as suitable bases for tiles. First, you must remove the old shower tray and replace the base frame with one suitable for your chosen Tile Redi pan. The Tile Redi range is extensive, ensuring that you can find one that perfectly fits your shower size and shape.

Next, align your Tile Redi base with the drain and attach the drainage pipe. Apply mortar and press the shower tray into place, focusing on the area around the drain. Once the mortar is cured, apply the backer board and use silicone sealant to waterproof the edges.

Tiling over Your Shower Base

After installing your Tile Redi shower base, you can begin tiling the shower tray. It is important to carefully plan the layout of the tiles before starting to ensure that each tile is placed correctly. Using a tile spacer can help you achieve an even layout.

Tile Redi recommends using their Redi Poxy adhesive for this task. Spread the adhesive on the base using a 1/8 x 1/8-inch V-notch trowel and then press the tiles into place.

Once the tiling is complete, it is essential to seal the edges of each tile using the same silicone sealant as before. Allow sufficient time for the mortar and grout to fully dry before using your shower.

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