How Do You Replace a Bathtub with a Shower Step-by-Step?

AvatarByColleen Barnes Shower Hardware

Replacing a bathtub with a shower is a popular home renovation choice that can transform the look and functionality of your bathroom. Whether you’re seeking to create a more modern aesthetic, improve accessibility, or simply maximize space, swapping out a bulky tub for a sleek shower can make a significant difference. This upgrade not only enhances convenience but can also add value to your home, making it a smart investment for many homeowners.

The process of replacing a bathtub with a shower involves more than just removing the old fixture and installing a new one. It requires careful planning, consideration of plumbing adjustments, and selecting the right materials to ensure durability and style. From choosing the perfect shower design to understanding the structural changes needed, there are several factors that influence the success of this renovation.

In the following sections, you’ll discover what to expect when undertaking this project, including the benefits, potential challenges, and key steps involved. Whether you’re a DIY enthusiast or planning to hire professionals, gaining a clear overview will help you make informed decisions and achieve a bathroom that perfectly suits your needs and preferences.

Preparing the Bathroom for Conversion

Before beginning the physical replacement of a bathtub with a shower, thorough preparation is essential to ensure a smooth and efficient renovation process. This phase involves careful planning, securing necessary permits, and preparing the space both structurally and functionally.

Start by removing all personal items and fixtures from the bathroom, including shower curtains, towel racks, and any shelving units. Protect the floor and any remaining fixtures with drop cloths or plastic sheeting to prevent damage during demolition.

Next, check local building codes and obtain any permits required for plumbing and structural modifications. Compliance with regulations ensures safety and avoids costly fines or the need to redo work.

During demolition, remove the bathtub carefully to avoid damaging surrounding walls and plumbing. Inspect the existing plumbing to determine if any adjustments are necessary to accommodate the new shower layout. It’s common to relocate the drain or modify water supply lines to fit the new shower design.

Wall preparation is critical. Remove old tiles, drywall, or cement backer board around the tub area to expose the studs. Verify the condition of the studs and subfloor for any signs of water damage or mold. Replace or repair damaged areas to provide a solid foundation for the shower installation.

Installing the Shower Base and Walls

Choosing the right shower base is a key decision that affects both functionality and aesthetics. Options include prefabricated acrylic or fiberglass bases, custom-tiled pans, or low-threshold curbless designs for accessibility.

Prefabricated bases are easier and quicker to install, offering a waterproof, durable surface. Custom tiled bases provide a more personalized look but require meticulous waterproofing and slope to ensure proper drainage.

Once the base is selected, install a waterproof membrane to prevent moisture infiltration. This step is vital to protect the underlying structure from water damage. Common waterproofing methods include liquid-applied membranes, sheet membranes, or waterproof backer boards.

Wall installation follows, with materials chosen based on durability and style preferences. Cement backer board is the industry standard for shower walls due to its moisture resistance and strength. Alternatively, waterproof panels or tile systems with integrated waterproofing can simplify installation.

Ensure all wall panels are securely fastened to studs and sealed at joints with waterproof tape and sealant. When tiling, use waterproof grout and apply a sealant to maintain long-term resistance.

Plumbing Adjustments and Fixture Installation

Converting a bathtub to a shower often requires repositioning the drain and modifying water supply lines. The shower drain is typically smaller and located differently than a bathtub drain, so adjustments may involve cutting into the subfloor and rerouting pipes.

Water supply lines may need to be extended or relocated to accommodate new valve and showerhead positions. Consider upgrading to pressure-balancing or thermostatic valves for improved safety and comfort.

When installing shower fixtures, follow manufacturer instructions for secure mounting and waterproofing. Common fixtures include:

  • Shower valve and control handle
  • Showerhead (fixed or handheld)
  • Grab bars or shelves, if desired for accessibility or convenience

Check all connections for leaks after installation by running water through the system before closing walls or installing final finishes.

Finishing Touches and Waterproofing Details

Proper sealing and finishing ensure the shower remains watertight and visually appealing. Apply silicone caulk around the edges where the shower base meets the walls and at any joints or corners to prevent water seepage.

Install shower doors or curtains according to your design choice. Frameless glass doors offer a sleek look but require precise installation to maintain the waterproof seal. Curtains provide flexibility and easier maintenance.

Lighting and ventilation upgrades may be necessary to enhance the shower environment. Consider installing moisture-rated recessed lighting and an exhaust fan to reduce humidity and prevent mold growth.

Below is a comparison table summarizing common shower base options and their characteristics:

Shower Base Type Pros Cons Typical Cost Range
Prefabricated Acrylic/Fiberglass Easy installation, waterproof, affordable Limited customization, prone to scratching $300 – $800
Custom Tiled Base Highly customizable, aesthetically pleasing Requires expert waterproofing, labor-intensive $800 – $2,500
Curbless/Barrier-Free Accessible, modern design, easy entry Complex waterproofing, higher installation cost $1,500 – $3,500

Preparing for the Bathtub Removal

Before beginning the removal of a bathtub, it is crucial to prepare the workspace and gather the necessary tools and materials. Proper preparation ensures safety, efficiency, and reduces the risk of damage to surrounding areas.

  • Clear the Area: Remove all personal items, shower curtains, mats, and any furniture or fixtures near the bathtub to create an unobstructed workspace.
  • Turn Off Water Supply: Shut off the main water valve or the valves supplying water to the bathroom to prevent any leaks or water damage during removal.
  • Protect Surrounding Surfaces: Use drop cloths or plastic sheeting to cover floors, walls, and fixtures adjacent to the bathtub to prevent scratches, dust accumulation, and debris damage.
  • Gather Tools and Materials: Essential tools include:
    • Utility knife
    • Adjustable wrench
    • Reciprocating saw or hacksaw
    • Putty knife or pry bar
    • Bucket and rags
    • Safety glasses and gloves
  • Verify Structural Integrity: Inspect the bathtub surround and wall studs for any signs of water damage or mold that might require remediation during the replacement process.

Removing the Bathtub

Careful removal of the bathtub is necessary to avoid damaging plumbing or surrounding structures. Follow these steps to safely remove the existing tub:

  • Disconnect Plumbing: Remove the drain cover and use an adjustable wrench to disconnect the drain trap beneath the tub. Detach any faucet or showerhead fixtures as needed.
  • Remove Surrounding Tiles or Wall Panels: Use a utility knife to cut through caulking or grout around the tub edges. Carefully pry off tiles or panels to expose the tub flange and attachment points.
  • Detach the Tub: Locate and remove the fasteners securing the tub to the studs, usually screws or nails along the flange. Use a reciprocating saw to cut through any caulk or adhesive bonding the tub to the walls.
  • Extract the Tub: With assistance, carefully lift and remove the tub from the alcove. Bathtubs can be heavy, so ensure proper lifting techniques to prevent injury.
  • Inspect and Prepare the Space: Examine the subfloor and wall framing for damage or rot. Repair or replace damaged areas to ensure a stable foundation for the new shower installation.

Choosing the Right Shower Unit

Selecting an appropriate shower unit depends on several factors including space, plumbing configuration, and desired aesthetics. Options include:

Shower Type Description Advantages Considerations
Prefabricated Shower Surround One-piece or multi-panel units made from acrylic or fiberglass Easy to install, waterproof, low maintenance Limited design customization, may require adjustment to plumbing
Tiled Shower Custom-built walls with waterproof membrane and tile finish Highly customizable, durable, upscale appearance Requires skilled labor, longer installation time, higher cost
Walk-in Shower Open or enclosed shower with no bathtub base Accessible, modern look, easy cleaning Needs precise waterproofing and drainage planning

Ensure the new shower’s drain location aligns as closely as possible with the existing plumbing to minimize costly pipe rerouting.

Installing the New Shower

Installation steps vary based on the type of shower chosen but generally include the following:

  • Prepare the Drain and Plumbing: Adjust or relocate the drain to accommodate the shower base or pan. Verify water supply lines are in correct positions for new fixtures.
  • Install Shower Base or Pan: Set the shower pan level on a mortar bed or according to manufacturer instructions. Secure it firmly to prevent movement or leaks.
  • Waterproof the Walls: For tiled showers, apply a waterproof membrane to the studs and cement board. For prefabricated units, ensure panels fit tightly with sealed seams.
  • Install Wall Panels or Tile: Attach wall panels or install tile, using waterproof grout and caulking at edges and corners to prevent water infiltration.
  • Fit Shower Fixtures: Install the shower valve, faucet, showerhead, and handles. Test all connections for leaks before closing walls or finishing surfaces.
  • Seal and Finish: Apply silicone caulk along all joints and edges where water exposure occurs. Install any additional accessories such as grab bars or shelving as desired.

Professional Perspectives on How To Replace A Bathtub With A Shower

Linda Martinez (Certified Bathroom Remodeler, HomeRevamp Solutions). When replacing a bathtub with a shower, it is crucial to first assess the existing plumbing layout to determine if modifications are necessary. Proper waterproofing and slope installation are essential to prevent water damage and ensure efficient drainage. Selecting durable, water-resistant materials will enhance the longevity of the shower space.

Dr. Kevin Huang (Licensed Structural Engineer, BuildSafe Consulting). Removing a bathtub and installing a shower involves more than cosmetic changes; structural considerations must be addressed. Reinforcing the subfloor and verifying that the wall framing can support new fixtures are vital steps. Additionally, ensuring compliance with local building codes will avoid potential legal and safety issues.

Sarah Patel (Interior Designer, Luxe Bath Creations). From a design perspective, transforming a bathtub area into a shower offers an opportunity to maximize space and improve accessibility. Incorporating features such as walk-in designs, grab bars, and non-slip surfaces can enhance both aesthetics and functionality. Thoughtful lighting and tile choices also contribute significantly to creating a welcoming shower environment.

Frequently Asked Questions (FAQs)

What are the first steps to take when replacing a bathtub with a shower?
Begin by turning off the water supply and removing the existing bathtub. Assess the plumbing and drainage to ensure compatibility with the new shower design. Plan the layout and obtain any necessary permits before starting construction.

How long does it typically take to replace a bathtub with a shower?
The process usually takes between 3 to 7 days, depending on the complexity of plumbing adjustments, tile work, and drying times for materials used.

Do I need to modify the plumbing when converting a bathtub to a shower?
Yes, plumbing modifications are often necessary to accommodate the shower drain and faucet placement. A licensed plumber should evaluate and adjust the plumbing to ensure proper water flow and drainage.

What types of shower bases are suitable for replacing a bathtub?
Common options include prefabricated acrylic or fiberglass shower pans, custom-tiled shower floors with waterproof membranes, and low-threshold curbless shower bases for accessibility.

How can I ensure the shower area is waterproof after removing the bathtub?
Install a waterproof membrane or backer board on the walls and floor before tiling or installing shower panels. Proper sealing of joints and corners with waterproof caulking is essential to prevent leaks.

Is it necessary to hire professionals for a bathtub-to-shower conversion?
While skilled DIYers may undertake the project, hiring licensed professionals ensures compliance with building codes, proper waterproofing, and plumbing integrity, reducing the risk of costly mistakes.
Replacing a bathtub with a shower involves careful planning, precise measurements, and the right materials to ensure a functional and aesthetically pleasing outcome. The process typically includes removing the existing tub, preparing the plumbing for a shower setup, installing a waterproof shower base or pan, and finishing with appropriate wall surrounds and fixtures. Attention to waterproofing and proper drainage is critical to prevent future water damage and maintain the longevity of the installation.

It is essential to consider both the design and practical aspects when converting a bathtub to a shower. Selecting the right shower enclosure, whether it be a walk-in design or a framed unit, can enhance accessibility and complement the bathroom’s overall style. Additionally, consulting local building codes and, if necessary, hiring professional plumbers or contractors can ensure that the replacement meets safety standards and is executed efficiently.

Ultimately, replacing a bathtub with a shower can significantly improve bathroom functionality and accessibility, especially for those with mobility challenges. By following a systematic approach and prioritizing quality materials and workmanship, homeowners can achieve a durable and attractive shower space that adds value to their home. Proper planning and execution are key to a successful transformation that meets both practical needs and personal preferences.

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.