Cody Casey
A bath pan, or shower pan, is the foundation of your shower, designed with a slight slope to direct water towards the drain. Over time, it may need replacing due to significant movement, visible leakage, or large cracks. This can be a moderately complex project for DIYers, requiring demolition work and advanced plumbing skills. However, repairing cracks or holes in your bath pan can be a straightforward DIY job, saving you money on an expensive replacement. This article will provide a step-by-step guide on how to fix a bath pan, including identifying the cause of the issue, gathering the necessary tools and materials, and performing the repair or replacement.
How to fix a bath pan
| Characteristics | Values |
|---|---|
| When to fix a bath pan | When there are cracks, chips, or holes in the bathtub or shower pan |
| Materials | Epoxy, plywood, cellophane tape, protective gear (goggles, respirator, gloves), sandpaper, spatula, craft stick, toothpick |
| Steps | 1. Identify the cause of the issue. 2. Spread epoxy on the plywood and press it onto the crack from the unexposed side of the pan. 3. Apply an upper layer of epoxy on the exposed surface and sand it down. 4. Sand the area where you're applying the patching or refinishing compound. 5. Mix the two components of the epoxy kit together. 6. Smooth the mixed epoxy into the crack, chip, or hole using a spatula, craft stick, or toothpick. 7. Fill the damaged area, adding thin layers of epoxy one at a time. 8. Let the epoxy dry. 9. Sand the patched area gently until it feels smooth. 10. Repeat the process if necessary. 11. Seal any gaps between the pan and the floor with caulk. |
| Cost | $20 to $240 depending on the extent of repairs and whether you hire a professional or do it yourself |
| Tips | Prevent problems by regularly cleaning with mild soap or a paste of baking soda and water. Avoid using chemicals known to deteriorate the material of the pan, such as turpentine, mineral spirits, paint thinner, and acetone. |
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What You'll Learn
Repairing cracks, chips, and holes in a bath pan
You can repair cracks, chips, and holes in a bath pan with a few simple tools and some epoxy. Before you begin, identify the material of your bath pan—it could be fiberglass, acrylic, porcelain, enamel, or ceramic. This is important because different surfaces will require different types of epoxy. Epoxy repair kits are available for all these materials and come in various shades of white and cream to match common bathroom fixtures.
If you are repairing the floor of a fiberglass stall, you can fix and reinforce larger holes and pits with scrap plywood in addition to epoxy, but only if you have access to the back or bottom of the pan. Spread epoxy on the plywood and press it onto the crack or hole from the unexposed side of the pan to seal it. Then, apply the upper layer of epoxy on the exposed surface and sand it down.
If you are repairing small chips or cracks, you will need an epoxy compound repair kit, a disposable tool to apply it with, and painter's tape. Clean the area with a sponge and tub cleaner, and apply painter's tape around the chip. Follow the directions in your kit to mix the components—2-part kits require you to mix both components, while 1-part kits only require you to shake the bottle. Apply the compound to the chipped area with a disposable paintbrush, plastic knife, or spatula.
For larger cracks and pits, it may be necessary to purchase fiberglass mesh to reinforce the putty and make it less likely to dimple. Apply the mixed resin onto the cracked area and press the fibreglass cloth over it. Smooth out any air bubbles or wrinkles using a brush or roller. Finally, apply additional layers of resin and fibreglass cloth if necessary, to reinforce the repair.
If you are patching a crack or hole, be careful not to sand outside of the area you will be filling, as you could easily scratch the surface of the tub. The key to a successful repair is to make sure you are using the right repair or refinishing kit for your tub or shower surface.
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Using an epoxy kit to fix a bath pan
Using an epoxy kit is an effective way to fix a damaged bath pan. Epoxy kits are available for porcelain, enamel, ceramic, acrylic, and fiberglass bathtubs. They also come in various shades of white and cream, so you can choose one that matches your tub or shower. Before using an epoxy kit, ensure that you have the right kit for your tub or shower surface.
First, clean the surface to be repaired thoroughly. Wash away any soap scum and residue with an abrasive cleaner. Then, sand the area and clean it again with cotton swabs and rubbing alcohol to remove any remaining grime. If you're just repairing a small chip or crack, you don't need to clean the entire tub or shower.
Next, prepare the epoxy mixture. The two-component epoxy kit will come with instructions for mixing and applying the epoxy. Typically, you'll need to mix the two components together in a mixing tray with a small stirring stick. Some kits come with a tray and stick, but if yours doesn't, use a small disposable tray and a toothpick, craft stick, matchstick, or another small disposable stick. Always protect the surface from spills with a piece of cardboard.
Once the epoxy is mixed, use a small spatula, craft stick, toothpick, or another tool to smooth it into the crack, chip, or hole. Fill the damaged area by adding thin layers of epoxy one at a time and smoothing them in one direction. Be careful not to use too much, as it's easier to add small amounts than to remove excess.
After applying the patch, let it dry for the recommended time, which can range from a few hours to 24 hours. Once it's dry, sand it gently with 400- or 600-grit sandpaper until it feels as smooth as the rest of the tub or shower's finish. If the chip or crack is still noticeable, you can apply a second layer of epoxy.
By following these steps and allowing adequate drying time between each step, you can effectively repair your bath pan with an epoxy kit.
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Replacing a shower pan
With the old pan removed, you can now install the new one. Place the new acrylic shower pan on the floor and check its fit against the studs, adjusting them if needed for a snug fit. Mark the shower pan's drain hole location on the subfloor and ensure it aligns with the existing plumbing. If not, you may need to drill a new hole in the floor, but avoid placing it directly above a joist. Attach the strainer to the drain hole in the shower pan, ensuring a tight and secure fit. Set the shower pan into place and check for level in all directions using a 4-foot level. Adjust with shims if necessary to achieve perfect levelling.
If your shower pan is too heavy to lift alone, enlist help. Before placing the new pan, ensure the subfloor is clean and free of debris, old adhesive, or caulk remnants. Check the subfloor for any damage or rot and replace any damaged sections before proceeding. The entire bottom of the shower pan needs to sit on a flat, level surface. If the subfloor is uneven, apply a self-leveling compound following the manufacturer's instructions. When replacing a shower pan, some manufacturers call for the pan to sit directly in an adhesive or into small mounds of mortar. If adhesive is called for, spread it within the area where the pan will sit. If mounds of mortar are specified, mark the locations on the subfloor per the manufacturer's instructions and position the mounds accordingly.
Shower pans come in various sizes, types, and materials, which will impact the cost of replacement. Basic shower pans typically range from $530 to $2,000, while custom pans can cost up to $4,600. Additional costs may include junk removal, plumbing installation or relocation, and adding a new drain line.
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Fixing a flexing shower pan
One method to reduce or eliminate flexing is to reinstall the shower pan in a mortar bed. This provides a more solid base for the pan and can prevent movement. If the shower pan was designed to be set in mortar but was not installed correctly, the warranty may be void. In this case, you can pour self-levelling mortar mix between the shower pan and the subfloor. This can be done by drilling a hole in the wall surrounding the shower base and using a funnel to pour in the mortar.
Another option is to use non-expanding foam to fill the voids between the shower pan and the subfloor. This method is popular among rental property owners and house flippers as it is easy and inexpensive. However, it is not considered best practice by many contractors. If using foam, ensure it is rated for damp environments and apply weight to the shower pan until the foam is cured.
If the flexing is due to insufficient support ribs, you may be able to add additional support by sliding pieces of shimmed, treated wood under the pan. Composite shims are recommended over wood as they are not susceptible to water damage.
For minor flexing, you may be able to make stabilising repairs to protect the drain fittings. One such method involves cutting a half-inch ring out of the pipe below the shower and placing a Fernco fitting over the cut, secured with gear clasps. This adds a shock absorber to the piping when it flexes.
It is important to consult a professional if you are unsure about the best course of action, as incorrect repairs may void warranties or cause further damage.
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Fitting a bath panel
A bath panel is a piece of acrylic or wood that fits around the bottom of the bath to hide the unfinished underside. They are popular in the UK, where most types of tubs require bath panels, including shower baths, straight baths, and corner baths.
To fit a bath panel, follow these steps:
Firstly, measure the length and height of your tub. You can do this by running the tape measure along the top edge of the bath where the panel will go, and then from the floor up to just under the top edge of the bath.
Next, choose the type of panel you want. A bendable acrylic type is the easiest to install, especially if your tub has an awkward shape, but it is not as durable as other types. Rigid panels, which come in wood or acrylic, are more sturdy and waterproof, but they will only work on straight edges.
Once you have chosen your panel, cut it to size if necessary. It is better to trim the panel to size rather than cut the skirting board, as the plastic may crack.
Now, you can install the panel. For bendable acrylic panels, simply screw the clips included with your panel into the underside of the lip of the tub, placing one in the middle and at least one on each end. Then, press gently on various parts of the panel to ensure it is secure.
For rigid panels, you will need to build a wooden frame. If your panel has a plinth, lay it on the floor and place the edge of the panel on top so they overlap. Adjust the height of the panel by moving it up and down on the plinth until it reaches the correct measurement. Screw the panel into the plinth by placing screws every 1 foot (0.30 m) or so on both the top and bottom of the plinth. For added water protection, apply a layer of silicone between the plinth and the panel.
Finally, check that your panel is secure by pressing gently on various parts of it.
For an easily removable bath panel, you could try using Buttonfix Type 2. These clips are extremely strong but can be removed with the right amount of force and are easy to install.
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Frequently asked questions
A bath pan, also known as a shower pan or base, is the foundation of your shower, designed with a slight slope to direct water towards the drain.
Identify the cause of the movement, as this is nearly as important as the fix itself. Once you know the cause, you may be able to make minor repairs to stabilise the pan or protect the drain fittings. If the pan has sustained visible damage, you may need to replace it.
First, turn off the water supply to the shower and disconnect the plumbing components. Remove the shower drain cover and drainpipe, then cut through the drainpipe connected to the old shower pan. Remove any surrounding materials and carefully lift out the old pan. Clean the subfloor, checking for any damage, and install the new pan, ensuring a proper fit and drainage to avoid future leaks.
Use a two-component epoxy repair kit from your local hardware store. Sand the area you will be applying the epoxy, then mix the two components and smooth the epoxy into the crack, chip, or hole with a small spatula, craft stick, or toothpick. Allow the epoxy to dry, then sand it gently. If you can still feel the damage, apply a second layer of epoxy.
Place the panel against the bath and check that it is level and fits correctly with a spirit level. If you are attaching two panels, use wooden battens to connect them. If you are attaching a single panel, place shallow battens at the bottom to keep the panel upright.
