Alexei Volkov
Building a plastic shower wall is a great DIY project, but it can be challenging. The process involves waterproofing the walls, which is often considered the most difficult part of building a shower. While tile and cement board are not waterproof, there are various waterproof membranes that can be used behind shower walls, such as shower liners or vapor barriers. It is also important to have a clear plan for waterproofing the joints, especially the vertical joints at the corners and the bottom edge where the panels meet the shower pan. One option for creating a waterproof shower wall is to use FRP (fiberglass-reinforced plastic) sheets with FRP adhesive and polyurethane sealant. Another option is to use PVC panels, which are inexpensive and simple to install. For a mobile home, it is recommended to use a replacement similar to the original shower setup, as a large cement shower base may not be suitable for the floor and frame of a mobile home.
| Characteristics | Values |
|---|---|
| Materials | Plastic or fibreglass base, FRP sheets, PVC panels, polyurethane sealant, cement, tile, mortar, grout, wood, screws, glue, epoxy paint |
| Installation | Install a pre-fabricated polyurethane or fibreglass pan, or build a custom shower pan with tile on a mortar bed |
| Waterproofing | Use a waterproof membrane such as shower liners or a vapor barrier, seal vertical joints at corners and bottom edges, ensure proper drainage |
| Cost | FRP sheets ($24.97 each), PVC panels (inexpensive), one-piece fibreglass stall (low cost), tile (not expensive if not excessive use) |
| Maintenance | Tile requires maintenance and cleaning of grout, epoxy paint can be used for plastic stalls, keep shower clean and dry to prevent mould |
| Size | Ensure shower walls are the correct size for the space, with enough room for soap and shampoo |
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What You'll Learn
Planning the waterproofing system
Firstly, understand the weak points of waterproofing. These are typically the vertical joints at the corners and the bottom edge where the panels meet the shower pan. It is essential to have a clear and effective plan to address these areas. Avoid using a bead of caulk as it is not a reliable waterproofing solution and can lead to hidden issues like leaks and mould.
Next, select the appropriate waterproofing materials. You can choose from various options, such as shower liners, vapour barriers, or waterproof membranes like PVC or other polymer membranes. These materials will create a dependable barrier to prevent water from reaching the subfloor. Ensure that the materials you choose are compatible with your shower setup, whether it's a custom-built enclosure or a prefabricated unit.
Then, consider the layers of your shower pan or floor. The shower pan should have a pre-slope made of mortar or a similar material, creating a tapered slope towards the drain. This pre-slope is laid on tar paper and covered with a waterproof liner. Above the liner, apply another bed of mortar, following the contours of the pre-slope. Finally, set the tiles in a thin bed of mortar or thin-set and add grout to the tile seams.
Additionally, pay attention to the shower walls and their interaction with the shower pan. Ensure that the bottom of the walls, where the tiles meet the shower pan, is installed correctly. Any mistakes in this area can allow water to seep behind the tiles and damage the underlying structure. Follow the manufacturer's instructions for your chosen waterproofing materials and carefully install each layer to create a robust and watertight system.
By carefully planning and executing the waterproofing system, you can ensure a functional and durable plastic shower wall installation.
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Choosing the shower base
When choosing the shower base, also known as a pan or tray, you will need to consider the size, shape, material, and installation type.
First, measure the length and width of the space where you plan to install the shower base. Standard shower base sizes are 32 inches by 60 inches and 30 inches by 60 inches, but there are over 100 different base sizes available to accommodate various shower sizes. Ensure that the shower base you choose will fit in the allotted space, with the drain hole matching the location of the existing drain to avoid re-plumbing.
Next, consider the shape of the shower base. Common shapes include rectangular, square, and corner. A rectangular base offers a spacious shower experience, while a square base is versatile and fits various door styles. A corner base is an excellent option for saving space and is perfect for small bathrooms. Other unique shapes include round, semicircle, pentagon, and oval, with round being a trendy choice.
Regarding materials, common options for shower bases include plastic, composite, ceramic, and fiberglass. Plastic shower bases are often made from materials such as PMMA, polystyrene, ABS, and Cristalplant®. Composites like fiberglass and resin are also popular choices, with brands offering their unique compositions. Fiberglass, for example, is easy to install and inexpensive, while resin resembles stone but is lighter and less expensive. Acrylic shower bases are moderately priced, easy to install, and simple to maintain.
Finally, consider the installation type for your shower base. The most common installation methods are raised, recessed, and ready-to-tile bases. Raised bases are placed directly onto the floor surface, creating a step and requiring a built-in vertical evacuation. Recessed bases offer walk-in shower access and are ideal for new construction or complete bathroom renovations, requiring the installation of a vertical recessed siphon. Ready-to-tile bases are designed to be covered in tiles and are excellent for individuals with reduced mobility, featuring an integrated slope for shower evacuation.
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$399
Framing the walls
First, ensure you have the necessary materials, including lumber, cement boards, tiles, waterproofing materials, and plumbing components. Before you begin framing, it's essential to have the shower base in place. This base will serve as the foundation for your shower and should be level and sturdy.
Next, you'll build the walls themselves. For a standard shower, you'll need to construct two walls for the sides. Use 2x4 lumber to create the wall frames, ensuring that the studs are no more than 16 inches apart. This spacing is crucial for providing adequate support and attaching the necessary plumbing fixtures. On the plumbing wall, space the studs about a foot apart to accommodate the shower faucet.
As you frame the walls, remember to include horizontal braces that will support the weight of the faucet and showerhead arm. These braces add structural integrity to your shower and ensure that the plumbing fixtures are securely held in place.
After the wall frames are constructed, it's time to cover them with the appropriate materials. Install ½-inch-thick cement boards onto the studs, using backerboard screws to attach them securely. Ensure the wall surface is smooth and even, as any imperfections will be noticeable once the tiles are installed.
Finally, before you begin tiling, caulk the gap at the bottom of the walls, where they meet the shower base. This step is vital for waterproofing your shower and preventing water damage. Any leakages can cause damage to the underlying structure, so it's essential to be thorough with your waterproofing measures.
Remember to follow local building codes and regulations and always wear the appropriate safety gear when undertaking construction projects.
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Installing tiles
When installing tiles on a shower wall, there are several key steps to follow. Firstly, ensure that you have selected waterproof tiles for the walls and slip-resistant tiles for the shower floor. It is important to plan the tiling project before beginning any installation work. If you are retiling, start by removing the old tiles and cleaning up any remaining tile and mortar dust with a wet/dry vacuum. Ensure that the framing is structurally sound and adequately reinforced at the corners.
Next, determine the layout of the cement board, ensuring that the edges parallel to the frame are supported by a structural framing member. Install a plastic vapour barrier just above the shower pan and then install the cement backer board according to the manufacturer's instructions. Measure and cut the panels to fit the shower walls, smoothing the cut edges. Install the boards 1/4-inch above the floor or shower pan and caulk accordingly. Use the appropriate nails or screws to fasten the cement board, following the manufacturer's instructions, and set the fastener heads flush with the surface without overdriving.
When cutting tiles, ensure that your tile saw blades are sharp to prevent slipping and causing damage. Always measure twice to ensure accuracy, and fit the tile pieces together correctly to avoid gaps that can lead to water problems. Choose an epoxy-style grout to minimise the occurrence of mildew and mould stains. Finally, clean up any remaining debris and vacuum any leftover dust to complete the tile installation.
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Painting the shower
Painting a plastic shower wall is a great way to give your bathroom a fresh look without breaking the bank. While it may not be a long-term solution, it can be a quick and easy fix, especially if you're working with a tight budget. Here are some detailed instructions and tips to guide you through the process:
Surface Preparation:
Start by thoroughly cleaning the plastic shower wall to remove any dirt, soap scum, or mildew. Ensure that the surface is completely dry before proceeding. If there are any crayon marks or stubborn stains that won't come off, consider using a mould spray containing bleach or chlorine, or a specialised remover like Krud Kutter or Goof Off. It is important to test these products on a small area first and ensure proper ventilation during their use.
Priming:
To ensure that the paint adheres well to the plastic surface, using a primer is essential. Look for a bonding primer, specifically a spray can bonding primer, which will help create a strong base for your paint. Apply the primer evenly across the surface, following the manufacturer's instructions. Pay extra attention to any spots that might need an extra coat of primer. If your shower wall is made of PVC, consider using a Xim vinyl primer as suggested by a contractor on a painting forum.
Painting:
Once the primer is dry, you can move on to painting. Choose a paint that is suitable for wet environments, such as a highly waterproof top coat. You can use regular paint or semi-gloss white paint, applying it with a brush or roller as per your preference. Make sure to follow the paint manufacturer's instructions for the best results. If you want a pure white colour, consider using a Rustoleum kit.
Maintenance:
Keep in mind that painted plastic shower walls may not be as durable as other options. To prolong the life of your painted shower, avoid using abrasive cleaning tools or harsh chemicals. A gentle cleaner and a soft-bristled brush should be sufficient for regular cleaning. Additionally, be cautious of sharp objects that could scratch the paint.
Alternative Options:
If you're concerned about the durability of paint, there are other affordable options to consider. Retrobrite can be an effective way to address discolouration, although it may be expensive. Alternatively, consider using a product like Spread Stone by Daich Coatings, which offers different coatings suitable for various surfaces, including tiles.
Remember, while painting a plastic shower wall can be a creative and cost-effective solution, it may not provide a permanent fix. For a more long-lasting solution, you might consider other options like FRP sheets, tiles, or purpose-built shower wall panels.
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Frequently asked questions
You will need a plastic or fibreglass base, FRP sheets, FRP adhesive, polyurethane sealant, and plastic quarter rounds for the corners.
A cheap option is to use 4x8 PVC panels, which are inexpensive and simple to install.
If you are building on a concrete slab, you will need to consider a riser kit.
The waterproofing system for tiles can be used for plastic shower walls, but it is not cheap. You can also use a shower liner or a vapor barrier.
You can use special epoxy paint to make your plastic shower wall look better. Keeping it clean is also important.
