Cody Casey
Replacing a shower pan is a complex task that requires plumbing knowledge and careful execution to avoid costly mistakes. While it is possible to replace a shower pan without replacing the entire shower unit, there are several factors to consider, such as the type of shower pan and the potential need for customisation. The process involves plumbing connections, creating a level surface, marking and cutting drain holes, securing the pan, and installing the drain trap. The cost of replacing a shower pan ranges from $530 for a small, basic pan to $4,600 for a large, custom pan, with additional costs for junk removal and plumbing expertise. Improper installation can lead to water damage, mould, and structural issues, emphasising the importance of accurate replacement.
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What You'll Learn
Pros and cons of DIY vs hiring a professional
Pros of DIY:
Replacing a shower pan can be a satisfying DIY project, especially if you have plumbing experience. The basic function of a shower pan is to create a waterproof barrier that funnels water down the drain, and this simple concept means that the process of replacing one is straightforward. The pan is a separate component from the rest of the shower, so you won't need to replace the entire unit. This means that you can save on labour costs, which typically range from \$350 to \$570, and you'll also avoid the inconvenience of having to arrange for a professional to come to your home.
Cons of DIY:
Improper installation of a shower pan can lead to water damage, mould, and structural issues. The pan must be level, and the drain properly connected, or you risk leaks. An incorrectly installed shower pan will deteriorate faster and may not last the usual 10 to 15 years. Fixing water damage and mould remediation can quickly become more expensive than hiring a professional to do the job properly the first time.
Pros of Hiring a Professional:
Hiring a local shower installer ensures the job is done right and can save you time and stress. A professional will be able to efficiently assess and prepare the area for installation, including properly waterproofing the space. They will also be able to advise on the best type of shower pan for your needs and handle the disposal of old materials.
Cons of Hiring a Professional:
The main downside of hiring a professional is the cost. Aside from the labour expenses, you will also need to factor in the cost of the new shower pan, the drain assembly, and other materials. If your installer discovers mould or water damage beneath the old shower pan, or if your plumbing is difficult to access, you can expect the overall cost to be higher.
While it is possible to replace a shower pan yourself, there are several advantages to hiring a professional, including ensuring the job is done correctly and avoiding potential water damage and mould issues. Weighing the pros and cons can help you make an informed decision about which option is best for your specific situation.
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Cost of a new shower pan
The cost of a new shower pan varies depending on the size, type, and other factors. The price can range from $530 for a small, basic pan to $4,600 for a large, custom pan. Many showers are standard sizes, like 32 by 32 or 36 by 36 inches. Square shower pans for these dimensions cost $150 to $250 or $150 to $600, respectively. If you have a shower-tub combo and the space is 48 by 48, the cost is $200 to $700.
If your shower size is not standard, you will need a custom pan made to fit. Custom shower pans cost $900 to $2,000 or more, depending on the materials chosen. Traditional pans in muted colors are more affordable than luxurious, natural stone pans. The cost of the new shower pan itself typically ranges from $150 to $700.
Additional costs to consider include the shower drain assembly ($50 to $70), plumber's putty ($3 to $6), and mortar ($10 to $20). If you hire a professional, labor costs add between $350 and $570. Junk removal costs an average of $250, depending on the size of your shower pan.
It is important to note that replacing a shower pan in a tile shower may be more complex and require professional assistance. An improperly installed shower pan can lead to water damage, mold, and structural issues. Therefore, it is recommended to carefully consider the costs and potential challenges before deciding to replace a shower pan.
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Removing the old shower pan
Removing an old shower pan is a moderately complex project that requires some demolition work and advanced plumbing skills. It is important to prepare your workspace and gather the necessary tools and materials before beginning the replacement process.
First, remove the shower drain cover using a screwdriver. Disconnect the drain pipe from the existing shower pan by loosening the fittings. If necessary, cut through the drainpipe connected to the old shower pan using a reciprocating saw for easier removal.
To access the old shower pan, you may need to remove some of the surrounding materials. Use a reciprocating saw to cut through any old acrylic shower surround, being careful not to cut into any wiring or pipes behind the walls. Remove any tiles or flooring materials that extend beyond the length of the new shower pan to fully expose the base. Use a hammer and cold chisel to remove any tile, and enlist help if the pan is too heavy to lift alone.
Once the old shower pan is exposed, carefully lift and remove it by gently prying it up from the corners. With the old pan removed, you can begin preparing the area for the new installation, ensuring proper waterproofing, and creating a level surface for the new pan to sit on.
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Preparing the area for a new installation
Preparing the area for a new shower pan installation involves several steps to ensure a successful installation. Here is a detailed guide:
First, check the subfloor area to ensure it is completely flat and level. If the subfloor is uneven, apply a self-levelling compound following the manufacturer's instructions. This step is crucial to ensuring your shower pan has a stable and even base. Use a self-levelling compound that adheres to the substrate, such as OSB, cement board, or plywood. Allow the compound to cure according to the manufacturer's instructions.
Next, dry-fit the new shower pan in the opening to ensure a proper fit. Trace the edge of the pan onto the subfloor with a marker. If the pan extends beyond the footprint of the old pan, you may need to remove some flooring. Check if the shower drain hole lines up with the existing drain. Mark the location of the drain hole with the new pan in place, and set the pan aside.
Now, you will cut the drain hole. Use a hole saw of about 4 inches that fits onto your power drill. Cut the drain hole in the floor following the manufacturer's instructions for the appropriate size. Disassemble the drain strainer for the new pan. It typically comes with two gaskets: one that goes on top of the shower pan and another that fits underneath the drain.
At this stage, you can also prepare the slope. Calculate your floor slope by measuring the distance from the drain to the farthest wall. The target is a 1/4" slope per foot from the wall to the drain. You can use mortar or a pre-made slope product for this step. Ensure the slope is dry and free of debris before measuring and marking the length and width of the mortar bed.
Finally, install the drain base. Place the drain base into a pre-made hole (typically 4-1/2 inches for tile shower drains) and screw the flange to the subfloor. If your drain is pre-assembled, you will need to loosen the bolts connecting the clamping ring to the flange and remove the ring, leaving the drain plug in place.
By following these steps, you will have effectively prepared the area for a new shower pan installation, ensuring a proper fit and effective drainage.
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Installing the new shower pan
Installing a new shower pan is a complex process that requires plumbing knowledge and the right tools. Here is a step-by-step guide to help you with the installation:
Prepare the Surface:
Start by removing the old shower enclosure and any remaining walls or flooring that may interfere with the new shower pan. Use a reciprocating saw to cut away panels and a pry bar with a hammer to tear out the existing structure. Ensure you have access to the drain pipe underneath. Vacuum the debris to create a clean workspace.
Measure and Mark:
Place the new shower pan in the desired location. Trace the edge with a marker and check if any flooring needs to be removed or adjusted to fit the new pan. Mark the location of the drain hole with the new pan in place, and set the pan aside. The drain hole size will be specified in the shower pan's installation instructions, typically requiring a hole saw of about 4 inches attached to a power drill.
Cut and Assemble the Drain:
Cut the drain hole in the floor as marked. Disassemble the drain strainer for the new pan. The drain assembly typically includes a gasket that goes on top of the shower pan, with another gasket underneath the drain. Insert the strainer and screw tight the nut at the bottom.
Secure the Shower Pan:
Place the shower pan back in position and ensure it is level. If adjustments are needed, use shims to create a level surface. Drill pilot holes in the top edges of the pan against the studs, and drive galvanized screws into the studs to secure the pan in place.
Connect the Drain Trap:
Under the shower pan, dry fit the parts for the new drain trap. Secure these connections with PVC glue. Push the compression gasket through the drain opening from the top side to connect with the PVC pipe. Use a mallet to force the gasket down while someone holds the pipe steady from below.
Finalize the Installation:
Install the screen on the drain strainer. Ensure that all connections are secure and properly sealed. You can now proceed with installing the shower walls and any additional finishing work.
This guide provides a general overview of the process, and specific steps may vary depending on the type of shower pan and your unique installation. Always refer to the manufacturer's instructions for your new shower pan and seek professional advice if you are unsure about any part of the installation process.
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Frequently asked questions
Yes, you can replace your own shower pan, but it is a complex job that requires plumbing and construction skills. If you do not feel comfortable doing this, it is recommended to hire a professional.
First, you need to remove the old shower enclosure and pan. Then, you need to access the drain pipe underneath and saw it off. Next, set the new shower pan in place and mark where to cut the drain hole. Cut the hole and install the new drain and trap. Finally, secure the shower pan with screws and install the compression gasket and drain strainer.
You will need a reciprocating saw, a pry bar, a hammer, a vacuum, a power drill with a hole saw attachment, a sharpie marker, a utility knife or chisel, a drill, galvanized screws, PVC glue, a mallet, and a compression gasket. For materials, you will need a new shower pan, a shower drain assembly, plumber's putty, and possibly mortar.
The cost of a new shower pan ranges from \$150 to \$700, depending on the size and material. The labor costs for installation range from \$350 to \$570. So, the total cost of replacing a shower pan can be anywhere from \$500 to \$2000 or more.
Yes, an improperly installed shower pan can lead to water damage, mould, and structural damage. It may also deteriorate faster and not last the expected 10 to 15 years. Therefore, it is important to carefully consider whether you have the necessary skills and knowledge to undertake this project.
