Step-by-Step Guide: How to Install a Walk-In Shower Base

Kelly Jul 01, 2026

Installing a walk-in shower base can transform your bathroom into a modern, accessible space. This guide will walk you through the process, ensuring you understand each step for a successful and safe installation.

The Easier Way to Build a DIY Walk in Shower
The Easier Way to Build a DIY Walk in Shower

Before you begin, ensure you have the right tools and materials. You'll need a level, tape measure, utility knife, caulk gun, silicone caulk, and a walk-in shower base kit, which includes the base pan, drain, and necessary hardware.

How to Install a Shower Base
How to Install a Shower Base

Preparation and Measurement

Accurate measurement is crucial for a perfect fit. Start by measuring the area where your shower will be installed. The base pan should fit snugly within the shower curb or wall surround.

How to Build a Walk-In Shower (Part 1: Wedi Shower Pan)
How to Build a Walk-In Shower (Part 1: Wedi Shower Pan)

Next, ensure the floor is level. If not, you may need to use shims or a self-leveling compound to create a flat surface for the base pan.

Removing the Old Shower Base

How to Install a Shower Base
How to Install a Shower Base

If you're replacing an existing shower base, carefully remove it. Use a utility knife to cut through any caulk or sealant, then pry up the base using a flathead screwdriver or pry bar.

Remove any remaining debris, including old nails, screws, or staples. Clean the area thoroughly to ensure a good bond with the new base pan.

Installing the Drain

How to Build Shower Pans
How to Build Shower Pans

Before installing the base pan, you'll need to install the drain. Position the drain assembly in the center of the base pan, following the manufacturer's instructions. Mark the drain hole location on the floor.

Cut out the drain hole using a hole saw or jigsaw, ensuring the hole is slightly smaller than the drain assembly to create a snug fit. Insert the drain assembly through the hole and secure it with the provided hardware.

Installing the Walk-In Shower Base

5 Reasons to use a One Level Wet Room Shower vs. a Shower Base with a Curb
5 Reasons to use a One Level Wet Room Shower vs. a Shower Base with a Curb

With the drain installed, it's time to place the base pan. Position the base pan in the shower area, ensuring it's level and centered. The base pan should rest on the curb or wall surround, not on the floor.

Use shims if necessary to level the base pan. Once level, mark the location of the base pan's lip on the curb or wall surround. This will help you ensure the base pan is properly positioned when you install the wall surround or curb.

112K views · 3.4K reactions | One step closer to finishing my dream shower! 🚿 Check out Parts 1-3 and save them to DIY your own curbless shower!  It’s not as hard as you’d think!  # | Theresa Vanderstar | DIY & Cabinetry Builds
112K views · 3.4K reactions | One step closer to finishing my dream shower! 🚿 Check out Parts 1-3 and save them to DIY your own curbless shower! It’s not as hard as you’d think! # | Theresa Vanderstar | DIY & Cabinetry Builds
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Securing the Base Pan

Secure the base pan to the floor using the provided hardware. Drill pilot holes through the base pan's lip, then screw it to the floor. Ensure the screws are long enough to penetrate the subfloor but not so long that they protrude through the bottom of the base pan.

Apply silicone caulk around the perimeter of the base pan, creating a watertight seal. Allow the caulk to dry completely before using the shower.

Installing the Wall Surround or Curb

With the base pan secure, you can install the wall surround or curb. Start by positioning the first panel or section of the curb, ensuring it's level and plumb. Secure it to the base pan using the provided hardware.

Continue installing the remaining panels or sections, ensuring each one is level, plumb, and properly aligned. Once all panels or sections are installed, apply caulk to any seams or joints to create a watertight seal.

Congratulations! You've successfully installed your walk-in shower base. Before using the shower, test it with water to ensure it's draining properly and there are no leaks. Regularly maintain your shower by cleaning the base pan and drains to prevent clogs and ensure optimal performance.