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How to Convert Bathtub to Walk in Shower

·10 min read·by
How to Convert Bathtub to Walk in Shower

That old bathtub might be taking up valuable space and be a tripping hazard as you get older. Converting it to a modern, accessible walk-in shower is a fantastic way to update your bathroom’s look and functionality. It’s a project that can significantly improve your daily routine, especially for those with mobility issues.

Let’s dive into how you can make this bathroom transformation happen.

Why Convert to a Walk-In Shower?

A walk-in shower offers several benefits over a traditional bathtub. First, it’s much easier to get in and out of, making it a safer option for seniors and people with disabilities. Gone are the days of stepping over a high tub wall!

Second, walk-in showers can make your bathroom feel more spacious and luxurious. They often feature sleek designs, ample showering space, and can be customized to your heart’s content. Finally, they can be a real selling point if you plan to move.

Many buyers prefer the convenience and modern aesthetic of a walk-in shower.

Is a Bathtub to Walk-In Shower Conversion Right for You?

Before grabbing your tools, let’s assess if this project fits your needs and capabilities. DIY conversion is possible, but it’s a significant undertaking. It involves plumbing, tile work, waterproofing, and potentially structural considerations.

If you’re not comfortable with these tasks, or if your plumbing and subfloor aren’t in good shape, hiring a professional contractor is wise. A good contractor can ensure the job is done correctly and up to code, saving you headaches down the line. Their expertise for tasks like ensuring proper drainage or tackling complex plumbing issues is invaluable.

The good news is that many of the core steps can be managed with careful planning and execution, even for a seasoned DIYer. We’ll break down the process step-by-step so you can see what’s involved.

Planning Your Walk-In Shower Conversion

This is arguably the most crucial phase. Get this right, and the rest of the project will flow much smoother.

1. Design and Layout

Think about your ideal shower. What size will it be? Where will the shower head, controls, and any benches or shelves go?

  • Size: The standard bathtub footprint is roughly 30 inches by 60 inches. You can often use this space for a walk-in shower, but you might have room to expand slightly, creating a more comfortable experience. Remember to allow enough space in your bathroom for the shower door to open (if you’re installing one). Consider a curbless shower for ultimate accessibility, which means the shower floor is flush with the bathroom floor.
  • Drainage: A crucial element is the shower drain. It needs to be positioned correctly to handle water flow effectively and prevent pooling. A linear drain can offer a modern look and efficient drainage.
  • Shower Head and Controls: Decide on the type of shower head (rain shower, handheld, standard) and where you want the controls. Placing them within easy reach is key.
  • Seating and Shelving: Will you include a built-in bench or corner shelves for shampoo and soap? These additions enhance functionality.

2. Material Selection

Your choices here impact durability, aesthetics, and maintenance.

  • Shower Base: Will you use a pre-fabricated shower pan or build a custom tiled base? Prefabricated pans are generally easier for DIYers. For a curbless shower, you’ll likely need a custom base with a sloped floor.
  • Walls: Tile is the most popular choice for shower walls, offering endless design possibilities. Ceramic, porcelain, and natural stone are common options. Ensure proper waterproofing behind the tile is non-negotiable. Cement board or a dedicated waterproof wall panel system are excellent choices.
  • Flooring: The shower floor needs to be slip-resistant. Small mosaic tiles or textured porcelain are good options. If you’re going curbless, this ties into your shower base slope.
  • Shower Door/Enclosure: You can opt for a frameless glass enclosure for a high-end look, a semi-frameless design, or even a shower curtain for a more budget-friendly approach.

3. Budgeting

Walk-in shower conversions can range from a few thousand dollars for a DIY job with basic materials to $10,000 or more for a high-end custom installation by a professional. Factor in:

  • Demolition costs (if any)
  • Plumbing supplies and fixtures
  • Shower base or materials for a custom pan
  • Wall and floor tiles, grout, and adhesive
  • Waterproofing materials
  • Shower door or curtain rod and curtain
  • Ventilation fan (if upgrading)
  • Labor costs (if hiring professionals)

4. Permits and Codes

Check with your local building department. You might need a permit for this type of renovation, especially if you’re altering plumbing or structural elements. Following local building codes is essential for safety and to avoid issues if you sell your home.

Step-by-Step Guide: Converting Your Bathtub to a Walk-In Shower

Now that the planning is done, let’s get to the nitty-gritty.

Step 1: Demolition and Preparation

This is where the mess happens.

  1. Turn off the Water: Locate the main water shut-off valve for your home and turn it off. Open a faucet on the lowest level of your house to drain the pipes.
  2. Remove the Bathtub:
    • Disconnect the faucet and handles.
    • Remove the tub spout and any overflow plate.
    • Carefully cut away caulk around the tub where it meets the walls and floor.
    • Identify how the tub is secured. It might be held in place by screws or nails along the top flange, or it might be set in mortar. You may need to carefully pry it out. Bathtubs can be heavy and awkward, so get help if needed.
    • If it’s a cast-iron tub, be prepared for its immense weight. You might need to break it into smaller pieces to remove it safely.
  3. Remove Surrounding Walls (if necessary): If the tub is an alcove tub surrounded by tile or drywall, you’ll need to remove this to access the studs and prepare for the new shower walls. Cut back the material several inches beyond the tub edge.
  4. Inspect and Repair Subfloor: Once the tub is out, you’ll expose the subfloor. Check for any signs of water damage, rot, or mold. Repair or replace any damaged sections. This is critical for the longevity of your new shower.
  5. Inspect Plumbing: Examine the existing drain and supply lines. If they are old, corroded, or not configured for a shower drain, you’ll need to address them. This might involve replacing sections of pipe or rerouting.

Step 2: Install the Shower Base and Drainage

This is where your shower starts to take shape.

  1. Rough-in Plumbing: If you’re moving or installing new drain and water supply lines, this is the time to do it. Ensure the drainpipe is properly connected and pitched correctly towards the main sewer line. Consult local codes for the required slope.
  2. Install the Shower Base:
    • Prefabricated Pan: Follow the manufacturer’s instructions precisely. This usually involves setting the pan in a bed of mortar or adhesive and ensuring it’s level. Connect the drain assembly to the pan and the P-trap.
    • Custom Tiled Base: This is more complex. You’ll need to build a sloped subfloor using a mud pan (a mixture of sand and cement) over a shower pan liner (a flexible waterproofing membrane). This requires careful attention to achieving the correct slope for drainage.
  3. Test for Leaks: After the base is in and connected, temporarily plug the drain and fill the base with a few inches of water. Let it sit for at least 24 hours to check for any leaks. This is a vital step before moving on.

Step 3: Waterproofing the Walls

This is your primary defense against water damage in the walls. Skipping or skimping here is a recipe for disaster.

  1. Install Backer Board: Screw cement board or a waterproof wall panel system onto the studs. Ensure all seams are staggered and fasteners are flush with the surface. Leave a small gap at the bottom to prevent it from sitting directly in any residual water from the pan.
  2. Apply Waterproofing Membrane: This is crucial. You can use a liquid-applied membrane, sheet membrane, or a vapor barrier system. Roll or trowel it onto the backer board, paying special attention to corners, seams, and around any pipe penetrations. Overlap seams according to the product manufacturer’s instructions. It’s often recommended to apply two coats.

Step 4: Tile the Shower

Now for the aesthetic part!

  1. Layout Your Tile: Plan your tile layout on the walls and floor to minimize cuts and ensure a balanced look. Start at the most visible corner. For wall tiles, often beginning at the height of the shower head or faucet is a good strategy.
  2. Apply Tile Adhesive: Use a notched trowel to spread the adhesive evenly onto a small section of the wall or floor.
  3. Set the Tiles: Press each tile into the adhesive with a slight twisting motion. Use tile spacers to maintain consistent grout lines. Work in small sections to prevent the adhesive from drying out.
  4. Cut Tiles: Use a tile saw or nippers for cuts around corners, fixtures, and edges.
  5. Grout the Tiles: Once the adhesive has fully cured (usually 24-48 hours), remove the tile spacers and apply grout with a grout float. Force the grout into the spaces between tiles, then wipe off the excess.
  6. Clean and Seal Grout: After the grout has cured slightly, use a damp sponge to gently clean the tile surfaces. Once the grout is fully cured (check the grout manufacturer’s recommendations), apply a grout sealer to protect it from stains and moisture.

Step 5: Install Fixtures and Shower Door

Finishing touches that make it functional!

  1. Install Shower Valve and Trim: Connect the shower valve to the water supply lines. Then install the trim kit, shower head, and handle controls.
  2. Install Shower Door or Curtain Rod:
    • Glass Door: This requires precise measurements and installation. Follow the manufacturer’s instructions very carefully. Ensure the frame is plumb and level before securing it. Proper sealing is essential.
    • Shower Curtain: Install a curtain rod according to its instructions.
  3. Install Accessories: Add any shelves, grab bars, or benches you planned for. Ensure grab bars are securely anchored into wall studs, this is a critical safety feature.

Step 6: Final Touches and Cleanup

  1. Caulk: Apply a good quality, mold-resistant silicone caulk around the base of the shower, where the walls meet the shower pan, and around any fixtures or the shower door frame. This provides a final barrier against water.
  2. Clean Everything: Give your new shower a thorough cleaning.
  3. Turn Water Back On: Slowly turn the main water supply back on and check for any leaks at the fixtures. Test the shower to ensure proper water flow and drainage.

Maintaining Your New Walk-In Shower

A walk-in shower requires regular cleaning to keep it looking its best and to prevent mold and mildew.

  • Daily: Rinse down the walls and floor after each use. Squeegeeing the glass doors can prevent water spots.
  • Weekly: Clean the walls, floor, and fixtures with a mild bathroom cleaner. For tile grout, a grout brush can be very effective.
  • Monthly: Deep clean the shower, paying attention to grout lines and any corners where soap scum might build up. Consider using a specialized tile and grout cleaner. Remember when how often to replace vacuum filter is important for a clean home, regular shower cleaning is equally vital.

Choosing the Right Professional

If you’ve decided to hire a pro, here’s what to look for:

  • Experience: Look for contractors with specific experience in bathroom renovations and shower conversions. Ask for references and see examples of their work.
  • Licensing and Insurance: Ensure they are licensed and insured. This protects you in case of accidents or shoddy workmanship.
  • Clear Quote: Get a detailed written quote that breaks down all costs, including materials, labor, and any potential contingencies.
  • Communication: Choose someone you feel comfortable communicating with. They should be able to explain the process clearly and answer all your questions.

Converting your bathtub to a walk-in shower is a significant project, but it can dramatically improve your bathroom’s safety, functionality, and aesthetic appeal. Whether you tackle it yourself or hire a professional, the result is a more accessible and modern bathing experience. It’s an investment that truly pays off in daily comfort and convenience.

For more home improvement insights, you might find our other articles on DIY repairs and home maintenance helpful.

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