Cody Casey
Putting a tub over a shower pan is possible, but it is not a straightforward process. It is important to consider the weight distribution and the possibility of water getting trapped underneath, leading to mould. Additionally, the drain size requirements for tubs and shower pans differ, with tubs requiring a 2 drain due to the presence of an overflow, while shower pans do not have this feature. If you are thinking of converting a shower into a tub, it is recommended to consult a professional and consider the cost of installation.
| Characteristics | Values |
|---|---|
| Possibility of putting a tub over a shower pan | Yes, it is possible |
| Drainage | Requires a 2" drain line |
| Installation | Requires professional installation |
| Cost | Varies depending on the type of tub and shower pan |
| Difficulty | May be challenging for beginners |
| Support | Tubs and shower pans may require additional support, such as thinset or foam bottoms |
| Cleaning | May be difficult to clean around and under the tub |
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What You'll Learn
Drainage considerations
When considering the drainage for a tub installed over a shower pan, several key factors come into play. Firstly, it is essential to ensure that the shower pan is installed correctly and is level. This means checking that the subfloor is flat and level before installing the shower pan. If the subfloor is uneven, a self-levelling compound can be applied to create a flat surface.
Secondly, the shower pan must have proper drainage capabilities. Most precast shower pans come with a pre-drilled drain hole or an indented area for drainage. When installing the shower pan, it is crucial to ensure that the drain hole aligns with the existing shower drain. If the hole does not align, adjustments may be necessary, such as cutting a new hole in the subfloor for the shower drain pipe or relocating the P-trap for the shower drain.
The next step is to position the shower pan correctly. Some manufacturers recommend placing the shower pan directly into an adhesive or small mounds of mortar, ensuring that it sits level and is secure. This step is crucial as it ensures that the shower pan does not shift or move, affecting drainage.
Additionally, the choice of materials for the shower pan can impact drainage. While some higher-end units have foam bottoms that do not require supplemental support, most shower pans are supplemented with dollops of thinset to ensure proper drainage. This helps to create a level surface and prevent water from pooling or draining incorrectly.
Finally, it is important to consider the height of the tub and shower unit when planning drainage. A raised platform or pedestal may be required to accommodate the P-trap, with a minimum height clearance of about 5 inches. This allows for proper drainage without the need to break up the concrete slab.
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Temporary tub options
If you are looking for temporary tub options, a portable bathtub is a great choice. These tubs are foldable, collapsible, and freestanding, making them easy to store and move around. They are available in various sizes, ranging from 46 to 58 inches, and can accommodate both adults and children.
Some of the features of portable bathtubs include easy-fold designs, drain plugs, and thermal foam to maintain water temperature. They are also space-saving, making them ideal for small bathrooms or homes with limited space.
You can find portable bathtubs at various price points, with options available on Amazon and Walmart. Prices range from as low as $39.99 to a few hundred dollars, depending on the features and size of the tub.
When considering a temporary tub option, it is important to ensure that the product you choose has the necessary stability and safety features, especially if it is intended for use by children. Additionally, always refer to the manufacturer's instructions for proper use and care to ensure the longevity of your portable bathtub.
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Permanent tub installation
If you're looking to install a permanent tub over a shower pan, there are a few things you should keep in mind, and several steps to follow to ensure a successful installation.
First, consider the weight of the tub. While a normal bathroom floor should be able to support a freestanding tub without extra framing, it is important to ensure that your floor can bear the load. Additionally, consider the drainage. Draining water from a tub into a shower pan can be challenging, and improper drainage can lead to flooding or mould issues. You may need to break up concrete and dig down to install a P-trap and ensure proper drainage. It is also essential to use a flat-bottomed tub to facilitate drainage and avoid mould issues.
Next, you'll need to choose the right tub and shower pan. Measure the space you have available and select a tub that will fit comfortably, allowing for a few inches between the tub and the wall. You'll also need to consider the type of shower pan you'll be using. If your shower space is standard, a preformed pan is a good option. However, if your space is not standard, you may need to use a custom-made shower pan or explore other options like Kerdi board and tile or a vinyl pan.
Now, let's get into the installation process:
Step 1: Remove the Old Fixtures
Turn off the water supply to the shower. Remove the showerhead, shower walls, and any other fixtures. You may also need to remove the wet wall and replace it, depending on the type of shower you have.
Step 2: Prepare the Space
Clean the area and remove any debris, nails, or binding materials left over. Repair any damaged drywall or subfloor, and ensure that the necessary cut-out for the shower drain is in place.
Step 3: Install the Drain
Rough-in the location of the drain based on the dimensions of the new tub and shower pan. You may need to break up concrete and dig down to install a P-trap. Use a template or cardboard cut-out to ensure the correct placement of the drain pan and drain location.
Step 4: Install the Plumbing
Install the necessary pipes and fittings to connect the tub to the water supply. Cut and cement plastic or PEX pipes and fittings, or use copper pipes if you're confident in your soldering skills. Be sure to maintain the proper slope away from the shower when installing the pipes.
Step 5: Place the Tub
Lift the tub into place, ensuring it is level and secure.
Step 6: Finalize the Installation
Connect the tub to the plumbing, including the drain, overflow tube, and P-trap. Be sure to use watertight connections to avoid leaks. Install any necessary safety features, such as grab rails, to complete the installation.
By following these steps and choosing the right tub and shower pan, you can successfully install a permanent tub over a shower pan.
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Cost and contractor concerns
The cost of installing a tub over a shower pan can vary depending on several factors, including the size, materials used, labour costs, and whether you opt for a custom design.
If you're installing a new shower pan, costs can range from $220 to $3,500, with the average cost being $1,620. The type of material you choose will significantly impact the overall cost. For example, affordable options like vinyl and fiberglass can start as low as $150, while natural stone, cast iron, or custom tile shower pans can cost upwards of $3,500.
Labour costs for shower pan installation typically range from $350 to $570, but they can go as high as $2,000, depending on the contractor and the complexity of the project. You can save on labour costs by doing some of the work yourself, such as removing the old shower pan and preparing the subfloor.
If you're converting a tub to a shower or installing a new shower, you'll need to consider the cost of plumbing services, which can be $45-$200 per hour. Moving the drain and changing the layout of your shower can add to the overall cost. Additionally, if you're replacing an existing shower pan, you may need to budget for water damage repairs, which can range from $1,500 to $9,000.
To save money on your project, you can bundle it with other remodelling tasks and hire a single contractor to handle everything. This will not only save you money but also make the project more efficient. It's important to obtain the necessary permits for bathroom work, which can cost around $200 to $2,000.
When it comes to contractors, you may need to hire both a remodelling contractor and a plumber. Remodelling contractors typically handle demo, prep work, framing, and any wall or surrounding repairs. Plumbers, on the other hand, are more costly per hour and are responsible for setting the unit, drain, and plumbing. To save money, you can do some of the demo work yourself and let the plumber handle the more specialised tasks.
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Support and maintenance
To ensure your shower is watertight, you may want to consider installing a shower pan. A shower pan is a ready-made tray that fits into your shower and is easier to install than creating a shower floor using a pan liner and tile.
Before installing a shower pan, you must correctly measure the space to ensure a smooth installation process. Use a tape measure to get the accurate length and width of the space. These measurements will help you purchase the right-sized pan.
It is important to place your shower pan on a level surface. First, remove any debris from the bathroom floor. Sweep up loose particles with a vacuum or broom. Then, use a putty knife or paint scraping tool to remove old caulking or adhesive. Ensure the entire surface is free of standing water before installing the tray. Wet surfaces create a home for mildew and mold and interfere with the caulk, resulting in a defective seal.
Some shower pans have feet. If yours does, pay attention to where the feet should go. If your pan does not have feet, use a bubble level to verify that there are no slopes. Ensure the bottom of the shower floor pan sits on a level surface. Inspect the area to verify that it is flat. If it is, you can begin installing the shower drain flange.
If the subfloor is not level, you must complete an additional step. Use a self-leveling compound that sticks to the material you are installing it over. For example, verify that the compound adheres to the cement board before applying it to the surface. Position the self-leveling compound up to the line you drew during your test fit. Place another material, such as a 1x2 board, in front of the line to prevent the compound from running out of the shower floor pan area. Allow it to cure according to the manufacturer's instructions.
Many shower pans are supplemented with dollops of thinset, which is pressed into the unit to provide additional support. There are also higher-end units with foam bottoms that do not require any supplemental support.
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Frequently asked questions
Yes, it is possible to put a tub over a shower pan. However, it is important to consider the weight distribution and the possibility of water getting trapped underneath, which can cause mould. It is also crucial to ensure that the floor can support the weight of the tub and that the plumbing is compatible.
It is essential to use a waterproof membrane around the studs and a good levelling system. Additionally, you may need to break up the concrete floor to install a drain for the shower pan.
If you are looking for a temporary solution, you can consider using a plastic or fibreglass tub. Alternatively, you can opt for a Japanese soaking tub or a freestanding tub inside the shower. Another option is to convert the tub into a shower stall base, but it is important to consult with a professional plumber to ensure it is within the local code.
