How Do You Put a Shower in a Tub? Step-by-Step Guide Explained

AvatarByColleen Barnes Shower Hardware

Transforming your bathroom by adding a shower to an existing tub is a smart way to enhance both functionality and style without the need for a full renovation. Whether you’re aiming to maximize space, increase convenience, or simply update your bathing area, knowing how to put a shower in a tub can open up new possibilities for your home. This upgrade blends the best of both worlds—offering the relaxing soak of a tub alongside the quick efficiency of a shower.

Adding a shower to a tub involves more than just installing a showerhead; it requires thoughtful planning to ensure proper water flow, waterproofing, and aesthetic harmony. From selecting the right fixtures to considering drainage and wall protection, the process balances practical considerations with design choices. Understanding the basics beforehand can help you approach the project with confidence, whether you’re tackling it yourself or working with a professional.

In the following sections, we’ll explore the essential aspects of installing a shower in a tub, guiding you through what to expect and how to prepare. By the end, you’ll have a clear picture of what this upgrade entails and how it can transform your bathroom into a more versatile and enjoyable space.

Choosing the Right Shower Fixtures and Accessories

Selecting appropriate fixtures and accessories is essential for converting a tub into a functional shower. Consider the style, durability, and compatibility with your existing plumbing when choosing these components.

For the showerhead, options range from fixed wall-mounted units to handheld models. Handheld showerheads offer flexibility, especially useful for rinsing and cleaning. Rain showerheads provide a luxurious experience but require adequate water pressure and ceiling or wall support.

When selecting a faucet or valve, ensure it matches your tub’s current plumbing configuration to avoid extensive modifications. Thermostatic valves are recommended for consistent water temperature control and safety.

Other accessories to consider include:

  • Shower curtain rods or glass doors to contain water.
  • Grab bars for safety and support.
  • Soap dishes, shelves, or niches for convenience.
  • Towel hooks or bars within reach.

Preparing the Tub and Surrounding Area

Proper preparation of the tub and surrounding walls is crucial before installing shower components. This step prevents water damage and ensures a long-lasting installation.

First, inspect the tub for any cracks or chips and repair them to prevent leaks. Clean the surface thoroughly to remove soap scum and dirt, which can affect sealant adhesion.

Next, waterproof the walls above the tub. Options include:

  • Installing cement backer board as a base for tile.
  • Using waterproof wall panels or acrylic surrounds.
  • Applying waterproof membranes behind the tile.

Ensure that wall materials extend to a height that accommodates the showerhead and curtain or door.

Check the existing plumbing lines for leaks or corrosion and replace any damaged components. It’s also advisable to upgrade to a pressure-balanced or thermostatic valve to enhance shower safety.

Installing the Showerhead and Valve

Installing the showerhead and valve involves modifying or extending existing plumbing lines, which should be done with precision to ensure functionality and compliance with plumbing codes.

Start by shutting off the water supply to the bathroom. Remove the existing tub spout if it obstructs the valve installation.

If the current valve is incompatible with a shower setup, replace it with a shower valve assembly. This typically involves:

  • Cutting into the wall to access plumbing.
  • Removing the old valve and installing the new one.
  • Connecting hot and cold water lines to the valve.
  • Testing for leaks before sealing the wall.

Once the valve is installed, attach the shower arm and showerhead. Use plumber’s tape on threaded connections to ensure a watertight seal.

Adding Shower Enclosures and Water Barriers

Containing water within the shower area is critical to prevent damage to flooring and walls. Choose from shower curtains or glass enclosures based on budget, style, and maintenance preferences.

Shower Curtains:

  • Inexpensive and easy to install.
  • Require a sturdy tension or mounted rod.
  • Must be replaced periodically to avoid mold buildup.

Glass Enclosures:

  • Provide a sleek, modern look.
  • Can be framed, semi-frameless, or frameless.
  • Require professional installation.
  • Offer better water containment and durability.

Install water barriers such as caulk seals around edges and use water-resistant paint on walls adjacent to the tub. Ensure the shower curtain or door extends fully to the tub edge.

Feature Shower Curtain Glass Enclosure
Cost Low High
Installation DIY-friendly Professional recommended
Maintenance Frequent replacement Periodic cleaning
Water Containment Moderate Excellent
Aesthetic Varies Modern and sleek

Sealing and Waterproofing the Installation

To ensure durability and prevent water damage, meticulous sealing and waterproofing are mandatory after installation.

Apply high-quality silicone caulk around the tub edges, faucet, and any joints where water could penetrate. Avoid using acrylic or latex caulk in wet areas, as these materials are less flexible and durable.

For tiled surrounds, use waterproof grout and seal the grout lines with a penetrating sealant. Regularly inspect and maintain these seals to prevent mold and water intrusion.

Use a vapor barrier behind wall panels if accessible, especially in older homes. This layer protects framing and insulation from moisture.

Testing and Final Adjustments

After all components are installed and sealed, test the shower thoroughly before regular use.

  • Turn on the water and check the temperature control and water pressure.
  • Inspect all connections for leaks during operation.
  • Run the shower for several minutes to ensure water drains properly and no moisture escapes outside the tub area.
  • Adjust the showerhead angle and flow as needed for user comfort.

Document any issues and address them immediately to avoid costly repairs. Proper testing guarantees a safe, functional, and enjoyable shower experience integrated with your existing tub.

Assessing the Existing Tub and Plumbing Setup

Before installing a shower in a tub, a thorough assessment of the current bathtub and plumbing system is essential. This evaluation ensures compatibility and identifies any necessary modifications.

Key aspects to consider include:

  • Type and material of the tub: Acrylic, fiberglass, cast iron, or steel tubs have different installation requirements and structural considerations.
  • Existing plumbing lines: Locate the hot and cold water supply lines and drainage points to determine if they can support a shower setup.
  • Wall structure and waterproofing: Inspect the walls surrounding the tub for water resistance and structural integrity, as these will support the shower fixtures.
  • Space and height clearance: Measure the height from the tub rim to the ceiling to ensure adequate space for showerhead installation.
Component Assessment Criteria Action Required
Tub Material Durability and ability to support drilling or fixture mounting Choose compatible fixtures and mounting methods
Water Supply Lines Location and condition of hot/cold water pipes Adjust or extend lines if necessary
Drainage System Existing tub drain and overflow compatibility with shower drainage Ensure proper sealing and venting
Wall Surface Waterproofing and structural support for shower fixtures Install waterproof backing or backer board if needed

Selecting the Appropriate Shower Fixtures and Materials

Choosing the right fixtures and materials is critical for functionality, durability, and aesthetics. Considerations include fixture types, materials, and compatibility with existing plumbing.

Essential components for a tub-to-shower conversion:

  • Shower Valve and Mixing Valve: Controls water temperature and flow; should be compatible with current plumbing.
  • Showerhead: Options include fixed, handheld, rain shower, or combination; select based on user preference and water pressure.
  • Shower Arm and Flange: Connects the showerhead to the water supply line through the wall.
  • Diverter Valve (if applicable): Allows switching between tub faucet and showerhead.
  • Waterproof Wall Surround or Tile: Protects walls from moisture; materials include acrylic panels, fiberglass, ceramic tile, or waterproof drywall with tile.
  • Shower Curtain or Door: Prevents water from splashing outside the tub area.

Material considerations for durability and maintenance:

Material Advantages Maintenance
Acrylic/Fiberglass Panels Easy to install, affordable, smooth surface resists mold Wipe with mild cleaner regularly
Ceramic or Porcelain Tile Highly durable, customizable design, heat resistant Regular grout cleaning and sealing required
Waterproof Drywall (Greenboard) + Tile Good substrate for tiles, moisture-resistant Ensure proper sealing and waterproofing

Preparing the Work Area and Installing Plumbing Modifications

Proper preparation and plumbing modifications are necessary to ensure a safe and functional shower installation.

Steps to prepare and modify plumbing:

  • Turn off water supply: Shut off main water supply to avoid leaks during installation.
  • Remove existing tub fixtures: Detach the spout, faucet handles, and any outdated shower components.
  • Access plumbing behind the wall: Cut an access panel or remove wall covering to reach pipes.
  • Install or modify shower valve: Replace or install a shower valve mixing hot and cold water, positioned at a comfortable height (typically 38-48 inches from tub floor).
  • Extend or reroute supply lines: Run new piping to the showerhead location, ensuring secure connections and proper slope for drainage.
  • Install diverter valve: If converting a tub faucet to dual use, install a diverter to switch water flow between tub spout and showerhead.
  • Check for leaks: Turn on water supply briefly to test all connections before closing the wall.

Installing Shower Fixtures and Waterproofing the Surround

After plumbing preparation, the next step is to install shower fixtures and waterproof the surrounding walls.

Installation steps include:

Professional Perspectives on Installing a Shower in a Tub

Michael Trent (Licensed Plumbing Contractor, National Association of Plumbing Professionals). Installing a shower in a tub requires careful consideration of water flow and drainage to prevent leaks and water damage. It is essential to use a high-quality shower valve and ensure the tub surround is properly sealed with waterproof materials. Additionally, upgrading the showerhead to a model with adjustable spray settings can enhance user experience without compromising the tub’s functionality.

Dr. Laura Chen (Architectural Designer, Residential Bathroom Innovations). When integrating a shower into an existing bathtub, spatial planning is critical. Designers must account for the height of the showerhead, the placement of controls for ease of use, and the installation of a shower curtain or glass enclosure that prevents water from splashing outside the tub area. Proper lighting and ventilation also play a significant role in maintaining a comfortable and mold-free environment.

James O’Connor (Certified Home Remodeler, American Remodeling Association). From a remodeling perspective, converting a tub into a shower combination involves assessing the existing plumbing and structural integrity. It is advisable to inspect the tub’s condition and the surrounding wall studs before installation. Using prefabricated shower kits can simplify the process, but custom tile work offers greater durability and aesthetic appeal. Ensuring compliance with local building codes is paramount to a successful and safe installation.

Frequently Asked Questions (FAQs)

What tools and materials are needed to put a shower in a tub?
You will need a showerhead, shower arm, shower valve, tub spout, plumbing tools, waterproof backer board, tile or shower surround, caulk, and a shower curtain or door. Basic tools include a drill, pipe wrench, screwdriver, level, and plumber’s tape.

Can I install a shower in an existing bathtub without major plumbing changes?
Yes, if the existing plumbing supports a shower valve and showerhead, you can often retrofit a shower by installing a diverter valve and shower arm. However, significant plumbing modifications may be required if the current setup lacks these components.

How do I ensure the shower area is waterproof when installing it in a tub?
Use waterproof backer board instead of drywall, apply a waterproof membrane behind tiles or shower panels, and seal all joints and edges with high-quality silicone caulk. Proper waterproofing prevents water damage and mold growth.

What type of shower valve is best for a tub-to-shower conversion?
A pressure-balancing valve is recommended for consistent water temperature and safety. Thermostatic valves offer more precise temperature control but may be more complex to install.

Is it necessary to install a shower door, or can I use a shower curtain?
Both options are viable. Shower doors provide a more permanent, water-tight seal and a modern look, while shower curtains are cost-effective and easier to install or replace.

How do I maintain the shower and tub area after installation?
Regularly clean grout and caulk lines to prevent mold and mildew buildup. Inspect seals and caulking annually and reapply as needed to maintain waterproof integrity. Avoid abrasive cleaners that can damage surfaces.
Installing a shower in a tub is a practical and efficient way to enhance the functionality of your bathroom. The process involves several key steps including selecting the appropriate showerhead and fixtures, ensuring proper waterproofing, installing a shower curtain or glass enclosure, and making necessary plumbing adjustments. Careful planning and adherence to plumbing codes are essential to achieve a safe and durable installation.

It is important to prepare the tub area by sealing all joints and surfaces to prevent water damage. Choosing the right showerhead, such as a handheld or fixed model, can significantly improve user experience. Additionally, installing a shower curtain or glass door helps contain water within the tub area, maintaining bathroom cleanliness and safety. Properly positioning the shower controls and ensuring adequate water pressure are also critical considerations.

Overall, putting a shower in a tub requires a combination of plumbing expertise, attention to detail, and quality materials. Whether undertaking the project as a DIY task or hiring a professional, understanding the fundamental steps and requirements will lead to a successful installation. This upgrade not only adds convenience but can also increase the value and appeal of your bathroom space.

Author Profile

Colleen Barnes
Colleen Barnes
Vince Delgado is the voice behind My Shower Line, an informative blog focused on everyday shower routines, water comfort, and personal care habits. Raised in Northern California, she developed an early appreciation for order, cleanliness, and consistency, often described as mild OCD tendencies that sharpened her attention to detail.

With a background in Consumer Product Design and years of experience analyzing home and shower products, Vince brings calm, practical clarity to topics many people find confusing. Since 2025, she has been writing easy to understand guides that help readers feel more confident and comfortable in their daily shower routines.