How to Replace a Bathtub and Wall Surround: A Step-by-Step DIY Guide

Bradley Jun 27, 2026

Replacing a bathtub and wall surround is one of the most impactful renovations you can make in a bathroom, instantly elevating both function and aesthetics. Whether you are dealing with outdated fixtures, surface stains, or significant damage, a full replacement offers a durable solution that enhances waterproofing and overall value. This guide walks you through the entire process, from initial planning to the final touches, ensuring a professional-quality result.

How to Install an Acrylic Bathtub and Surround
How to Install an Acrylic Bathtub and Surround

Before any demolition begins, meticulous planning is essential to avoid costly mistakes and delays. You must accurately measure the existing space, select materials that complement your bathroom’s moisture levels, and confirm that the new fixtures align with your current plumbing configuration. Taking the time to prepare the workspace, gather tools, and understand the sequential steps will save you time, effort, and potential frustration down the line.

Bathroom Makeover: Demo {Day 2-4}
Bathroom Makeover: Demo {Day 2-4}

Essential Tools and Materials for a Successful Replacement

A successful overhaul depends heavily on having the right equipment and supplies on hand. Gathering everything before starting prevents interruptions and keeps the workflow efficient. You will need a combination of general contractor tools and specialized bathroom finishing items to complete the job properly.

How to Install an Acrylic Bathtub and Surround
How to Install an Acrylic Bathtub and Surround
  • Reciprocating saw or utility knife for cutting through old fixtures
  • Adjustable wrenches and channel locks for plumbing disconnections
  • Tape measure, level, and pencil for precise layout work
  • Construction adhesive, thinset mortar, and grout for installation
  • Silicone caulk and waterproof sealant for moisture protection
  • Safety gear including gloves, goggles, and a dust mask

Step-by-Step Process to Remove the Old Fixture

a bathroom with the words 13 common bathtub remodeling mistakes you do not want to make
a bathroom with the words 13 common bathtub remodeling mistakes you do not want to make

The demolition phase sets the stage for the entire project. It involves safely disconnecting water lines, removing the old bathtub, and carefully taking out the existing wall surround to expose the underlying structure. Working methodically during this stage ensures that the framing and subfloor are left intact and ready for new materials.

Shut Down Utilities and Protect the Space

Begin by turning off the water supply valves located near the tub or behind the access panel. Open the faucet to drain residual water from the lines. Next, turn off the electricity to any fixtures or heaters in the area, and cover the workspace with drop cloths to contain dust and debris. Safety is paramount, so wear protective gear before proceeding.

Replace Bathtub: An Overview of an Acrylic Tub Installation - Small Bathroom Remodeling
Replace Bathtub: An Overview of an Acrylic Tub Installation - Small Bathroom Remodeling

Disconnect Plumbing and Remove the Bathtub

Locate the supply and drain lines connected to the faucet assembly. Use wrenches to loosen and detach these lines, having a bucket ready to catch any residual water. Once plumbing is clear, loosen the caulk seal around the tub edges and use a pry bar or reciprocating saw to cut through any fasteners. Carefully lift the tub, potentially requiring assistance due to its weight, and dispose of it responsibly.

Preparing the Substructure for New Materials

a bath tub sitting next to a white toilet in a bathroom under construction text reads remodeling basics how to demo a tiled shower
a bath tub sitting next to a white toilet in a bathroom under construction text reads remodeling basics how to demo a tiled shower

With the old fixture removed, you will see the subfloor and wall framing. Inspect these surfaces thoroughly for any signs of water damage, rot, or mold. Repair or replace compromised wood to create a solid, even foundation. This step is critical because imperfections in the substructure will translate to flaws in the new bathtub and surround.

After structural repairs are complete, install a moisture barrier if required by your local building code. Apply a waterproofing membrane to the wall studs behind the new tub area, ensuring complete coverage from the floor up to the height of the surround. This creates an additional layer of protection against moisture intrusion and prolongs the life of your renovation.

How to Install an Acrylic Bathtub and Surround
How to Install an Acrylic Bathtub and Surround
7 tricks to turn a tub into a walk-in shower
7 tricks to turn a tub into a walk-in shower
Bathroom Makeover: Demo {Day 2-4}
Bathroom Makeover: Demo {Day 2-4}
Bathtub Replacement in Old Bathrooms: Our Step-by-Step Guide
Bathtub Replacement in Old Bathrooms: Our Step-by-Step Guide
Easy Steps to Remove a Plastic Tub Surround | DIY Bathroom Renovation Tutorial! #DIYTutorial
Easy Steps to Remove a Plastic Tub Surround | DIY Bathroom Renovation Tutorial! #DIYTutorial
Replace or Repair a Mobile Home Bathtub - Mobile Home Repair
Replace or Repair a Mobile Home Bathtub - Mobile Home Repair
How To Remove A Fiberglass Bathtub And Surround
How To Remove A Fiberglass Bathtub And Surround
the bathroom is being remodeled and ready to be used as a bathtub or shower
the bathroom is being remodeled and ready to be used as a bathtub or shower
BEFORE & AFTER: Replacing My Fiberglass Bathtub
BEFORE & AFTER: Replacing My Fiberglass Bathtub
Semi-DIY Bathroom Remodel: Replacing a Tub Surround | replacing the bathtub surround tile
Semi-DIY Bathroom Remodel: Replacing a Tub Surround | replacing the bathtub surround tile
How to Fix Wet Drywall Next To a Bathtub. A Comprehensive Guide
How to Fix Wet Drywall Next To a Bathtub. A Comprehensive Guide
How I Saved $1500 in my Bathroom Renovation (and you can too)
How I Saved $1500 in my Bathroom Renovation (and you can too)
How to Refinish a Bathtub on a Budget - Erin Spain
How to Refinish a Bathtub on a Budget - Erin Spain
a bathroom with a black and white checkered floor, shower curtain, and bathtub
a bathroom with a black and white checkered floor, shower curtain, and bathtub
How to Install a Tub Surround
How to Install a Tub Surround
Lake House DIY Bathroom Renovation
Lake House DIY Bathroom Renovation
How to Update A Tub Surround - Lemons, Lavender, & Laundry
How to Update A Tub Surround - Lemons, Lavender, & Laundry
Ideas to Coverup Your Bathtub Surround  — The Decor Formula
Ideas to Coverup Your Bathtub Surround — The Decor Formula
Factors to Think About Before Converting Your Bathtub to Shower
Factors to Think About Before Converting Your Bathtub to Shower
Easy Bathroom Project: Tub Refresh Reveal
Easy Bathroom Project: Tub Refresh Reveal

Installing the New Bathtub and Wall Surround

With the prepared substructure drying and ready, you can begin installing the new bathtub. Follow the manufacturer’s instructions precisely for positioning the tub, ensuring it is level and properly anchored to the studs. Secure the tub with appropriate fasteners and reattach the drain assembly before moving on to the walls.

Once the tub is set, begin applying the wall surround panels or tile. Start from the floor and work upward, using thinset mortar to bond materials to the waterproof membrane. Maintain consistent spacing for grout lines and use tile spacers to ensure uniformity. Cut edge pieces to fit around the tub apron and faucet outlets with precision for a seamless finish.

Final Sealants and Restoration

The final phase involves sealing every joint and edge to prevent water from seeping behind the new surround. Apply a high-quality silicone caulk where the tub meets the walls and floor, smoothing it evenly to create a waterproof barrier. Reconnect the plumbing fixtures, turn the water supply back on, and test for any leaks before restoring the surrounding drywall or trim.

Finishing touches include cleaning the surfaces, replacing any necessary grouting, and allowing sealants to cure fully. Once the materials have set, you will have a fresh, resilient bathroom that looks and functions like new. By following these detailed steps, you ensure a durable, attractive result that stands up to daily use and moisture exposure.