Chloe Zhang
Tiling over a plastic shower pan can be a complex process, with several factors to consider. The flexibility of a plastic shower base can cause issues with tile adhesion, as the weight of the tiles can cause the mortar to crack over time. This can be mitigated by using a Tile Redi shower pan, specifically designed for tiling, or a custom-built tile shower. Prefabricated showers are a popular choice, offering a range of textures, colours, and shapes, but they are not always suitable for remodelling projects due to their size. For a custom-built tile shower, carpenters first construct the alcove's structural frame, which tilers then finish with tiles or stonework. This process can be lengthy and labour-intensive, but the end result can increase the resale value of your home. Proper maintenance is also required to prevent grout lines from becoming prone to mildew, cracking, and leaking.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Tile material | Ceramic tile is a premium building material that increases resale value. |
| Tile appearance | Tile is an appealing material for a shower base. |
| Tile durability | When installed properly, tiles are hard-wearing and long-lasting. |
| Tile maintenance | Ceramic tile is straightforward to clean, but grout lines must be regularly sealed to prevent mildew, cracking, and leaking. |
| Plastic shower pan issues | Plastic shower pans are flexible and may not properly support the weight of mortar and tile, leading to cracking. |
| Mortar adhesion | Thinset mortars may not adhere well to the smooth surface of a plastic shower pan. |
| Alternative methods | Tile Redi shower pans are designed to replace plastic shower trays and provide a suitable base for tiles. |
| Installation process | Plan the tiling layout, use an adhesive to apply tiles, and seal the edges with silicone sealant. |
| Waterproofing | Use a waterproofing membrane to isolate the old tile before retiling. |
| Drain considerations | Ensure the new drain grate doesn't sit above the new tile and test for leaks before tiling. |
| Weight considerations | Custom tile showers can put hundreds of pounds of weight on the floor structure, potentially causing damage. |
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What You'll Learn
Tile adhesion issues
Tiling over a plastic shower pan can be challenging due to tile adhesion issues. The flexibility of plastic shower pans makes it difficult to achieve proper mortar adhesion, which is crucial for a durable tile installation. Here are some important considerations and techniques to address tile adhesion issues when tiling over a plastic shower pan:
The flexible nature of plastic shower pans can lead to mortar cracking. When weight or pressure is applied to the shower base during use, the mortar is likely to crack due to the flexibility of the plastic base. This can cause the tiles to crack or come loose over time. Therefore, it is essential to choose a suitable mortar that can withstand the flexibility of the plastic pan without cracking.
The smooth surface of plastic shower pans can also pose adhesion challenges. Standard thinset mortars may not adhere adequately to the smooth plastic surface, even if it is sanded down. As a result, the tiles may not bond securely to the shower pan. To overcome this issue, it is recommended to use a specialised adhesive designed for use with plastic shower pans, such as Tile Redi's Redi Poxy adhesive. This adhesive is specifically formulated to create a strong bond between the tiles and the plastic surface.
To ensure proper adhesion and a long-lasting installation, it is crucial to follow the correct installation procedures. Before applying the adhesive, it is important to plan the tiling layout to ensure a neat and even tile arrangement. Tile spacers can be used to achieve consistent spacing and alignment. Once the layout is determined, spread the adhesive evenly across the base using a suitable trowel, such as a 1/8 x 1/8-inch V-notch trowel. Then, firmly press the tiles into place, following the planned layout.
After tiling, it is essential to seal the edges of each tile with a silicone sealant. This step helps to waterproof the installation and protect the tiles and grout. Allow adequate drying time for the mortar, grout, and sealant before using the shower to ensure that the tiles are securely adhered and to prevent moisture-related issues.
By addressing the tile adhesion issues and following the recommended installation techniques, you can successfully tile over a plastic shower pan, creating a functional and aesthetically pleasing shower area.
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Using a Tile Redi shower pan
Tiling over a plastic shower pan can be challenging due to the flexibility of the plastic base and the difficulty of mortar adhesion. The plastic base may not adequately support the weight of the mortar and tiles, leading to cracking. Additionally, the smooth surface of the plastic shower pan can hinder the mortar's ability to stick.
To overcome these issues, you can use a Tile Redi shower pan, specifically designed for tiling. The Tile Redi range offers various options to suit different shower sizes and shapes. Before installing a Tile Redi pan, you must remove the old shower tray and replace the base frame with one compatible with your chosen Tile Redi pan. The Tile Redi pan replaces the plastic shower tray and provides a suitable surface for tile adhesion.
Once the Tile Redi pan is installed, you can begin tiling your shower tray. It is essential to plan your tiling layout beforehand to ensure a neat and even tile arrangement. Tile Redi recommends using their Redi Poxy adhesive. Spread the adhesive across the base using a 1/8 x 1/8-inch V-notch trowel, then press the tiles into place. After completing the tiling, seal the edges of each tile with silicone sealant to waterproof the joints.
Additionally, Tile Redi offers the Base'N Bench® shower kit, which includes a Ready to Tile Redi Base® Shower Pan and a Redi Bench® seat. This kit features an integrated drain, pitch, curb, and splash walls, providing a convenient and comprehensive solution for your shower installation.
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Isolating old tiles with a waterproofing membrane
Tiling over a plastic shower pan is not recommended due to the flexibility of the plastic base. The plastic base will not support the bed of mortar necessary for tile adhesion, and the mortar will likely crack as soon as pressure is applied to the shower base. This will cause the tiles to crack or come loose.
If you are set on installing tiles over your plastic shower pan, you will need to change the material of your backing. Tile Redi shower pans are designed for this purpose. You will first need to remove your old shower tray and replace your base frame with one suited to your Tile Redi pan of choice. Once your Tile Redi shower base is installed, you can apply tile to your shower tray.
Before you begin, it is important to take time to plan your tiling layout so you know where each tile will go. A tile spacer can help you ensure an even layout. Tile Redi recommends their Redi Poxy adhesive for this job. Spread the adhesive across the base using a 1/8 x 1/8-inch V-notch trowel and then press the tiles into place.
Once you have completed your tiling, seal the edges of each tile using a silicone sealant. While this step may not be necessary if your tiling is done perfectly, it is better to be safe than sorry. You can use a waterproofing membrane such as Kerdi, Hydroban, or Redguard, or a plastic liner to ensure your shower is waterproof. These products are designed to make showers completely waterproof and will last far longer than backer board alternatives.
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Using mortar to attach tiles
Tiling over a plastic shower pan can be challenging due to the flexibility of the plastic base and the smooth surface, which makes mortar adhesion difficult. Here is a step-by-step guide on using mortar to attach tiles to a plastic shower pan:
Prepare the Surface
Before you begin, ensure your plastic shower pan is clean and free of any debris. It is important to note that the flexible nature of plastic may cause the mortar to crack over time, so it is recommended to replace the plastic pan with a Tile Redi shower pan designed for tile installation. If you choose to proceed with tiling over the plastic pan, you will need to roughen the surface to improve mortar adhesion. You can use a sanding tool to create a rough texture on the plastic surface.
Apply a Waterproofing Membrane (Optional)
It is recommended to isolate the plastic pan with a waterproofing membrane, such as the Schluter-Kerdi membrane, to ensure a good bond between the plastic surface and the mortar. Apply a thin layer of latex-modified thinset to the pan and place the membrane over it, allowing it to cure for at least 24 hours.
Prepare the Mortar
Mix your chosen mortar according to the manufacturer's instructions. Modified thin-set mortars will require a longer cure time for proper bonding. Ensure you have enough mortar prepared to cover the entire area you plan to tile.
Apply the Mortar
Using a trowel, spread the mortar evenly across the shower pan, creating a bed of mortar thick enough for tile adhesion. Ensure the mortar is level and free of any lumps or air bubbles.
Set the Tiles
Once the mortar is applied, carefully set your tiles into the mortar bed, following your planned layout. Use a tile spacer to ensure even spacing and press the tiles firmly into the mortar. Make sure the tiles are level and aligned correctly.
Seal the Edges
After the tiles have been set, seal the edges of each tile using a silicone sealant. This will help prevent water intrusion and ensure a durable finish.
Remember that tiling over a plastic shower pan has its challenges, and the mortar may not adhere properly even with these steps. For a more reliable and long-lasting solution, consider installing a Tile Redi shower pan designed for tile application.
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Choosing the right tiles
Material
The material of the tiles is an important consideration. Ceramic tiles are a popular choice for showers due to their natural, premium look and straightforward maintenance. They are made from natural clay, which gives them a unique and elegant appearance. Ceramic tiles are also known for their durability and can increase the resale value of your home compared to synthetic shower materials. However, keep in mind that tile showers have grout lines that require regular sealing to prevent mildew, cracking, and possible leaking.
Size and Shape
Consider the size and shape of the tiles that will best fit your shower space. Larger tiles can make a small shower feel more spacious, while smaller tiles can add texture and visual interest. Choose a shape that complements the overall design of your bathroom, whether it's classic square or rectangular tiles or unique shapes like hexagons or arabesques.
Colour and Design
The colour and design of the tiles will have a significant impact on the overall aesthetic of your shower. You can choose from a variety of solid colours, patterns, or textured designs to create the desired atmosphere. Consider the existing colour palette of your bathroom and select tiles that complement the space. Remember that light-coloured tiles can make a room feel more open and airy, while darker tiles can add a sense of warmth and sophistication.
Texture and Slip Resistance
Safety is a crucial factor when choosing shower tiles. Opt for tiles with a slightly textured or matte finish to provide slip resistance, especially if you have young children or elderly family members. This will help prevent accidents and provide a safer showering experience. Some tile materials, such as natural stone, can also be treated with a slip-resistant coating to enhance traction.
Weight
Consider the weight of the tiles, especially if you plan to tile the shower walls as well as the base. Large ceramic tile showers can put hundreds of pounds of pressure on the floor structure. If your shower has a custom tile shower pan, ensure that the floor can bear the weight to avoid flexing and breaking the grout joints or tiles.
Remember, when tiling over a plastic shower pan, it is recommended to use a Tile Redi shower pan designed specifically for this purpose, ensuring proper adhesion and a stable base for your tiles.
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Frequently asked questions
It is not recommended to tile over a plastic shower pan due to the flexibility of the plastic base, which will not support the bed of mortar necessary for tile adhesion. However, there are Tile Redi shower pans designed to replace plastic shower trays and act as a suitable base for tiles.
First, remove your old shower tray and replace your base frame with one suited to your Tile Redi pan of choice. Then, plan your tiling layout and use a tile spacer to ensure an even layout. Next, spread the Redi Poxy adhesive across the base using a 1/8 x 1/8-inch V-notch trowel and press the tiles into place. Finally, seal the edges of each tile using silicone sealant.
Yes, one alternative is to isolate the old tile with a waterproofing membrane, such as the Schluter-Kerdi membrane, and set a new grate over the existing drain. This process involves scoring the old tile and drain assembly, covering it with a thin-set mortar, and then installing the waterproofing membrane, letting it cure for about 24 hours.
Tiles, especially ceramic tiles, can increase the resale value of your home compared to synthetic shower materials. They are also appealing, hard-wearing, and long-lasting when installed properly.
Tiling a shower can be a complex and labour-intensive project. The grout lines between tiles can be prone to mildew, cracking, and leaking if they are not regularly sealed and maintained. Additionally, the weight of a large ceramic tile shower can put a significant amount of pressure on the floor structure, potentially causing it to flex and break the grout joints or tiles.
