How to Install Delta Shower Base: Step-by-Step Guide

Kelly Jul 01, 2026

Installing a Delta shower base can transform your bathroom into a modern, functional space. This comprehensive guide will walk you through the process, ensuring a watertight and durable result that stands the test of time. Let's dive in!

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

Before we begin, ensure you have the necessary tools and materials. You'll need a Delta shower base, silicone caulk, a trowel, a level, a rubber mallet, and a screwdriver. Safety first: turn off your water supply and drain the lines to prevent any unexpected leaks.

How to Install the Delta® EverEdge Shower Base (48x34)
How to Install the Delta® EverEdge Shower Base (48x34)

Preparation and Measurement

Start by measuring your shower area. Delta bases come in various sizes, so it's crucial to choose the right fit. Measure the width and length of your shower space, and compare it to the dimensions of your chosen Delta base.

a shower with the words how to install a shower base above it and below it
a shower with the words how to install a shower base above it and below it

Once you've confirmed the base fits, prepare the area. Remove any old materials, ensuring the subfloor is clean, dry, and level. If necessary, use a self-leveling compound to create a smooth, even surface.

Installing the Shower Base

a man is working on the wall in his home that's being built with drywall
a man is working on the wall in his home that's being built with drywall

Begin by placing the Delta shower base in position. Ensure it's level and centered in the shower area. If needed, use shims to achieve a perfect level.

With the base in place, use a rubber mallet to gently tap it into position. This helps create a tight seal with the subfloor. Be careful not to over-tighten, as this could damage the base.

Securing the Shower Base

a shower with the words the easy way to build a tile shower on it's side
a shower with the words the easy way to build a tile shower on it's side

Once the base is level and secure, it's time to fasten it down. Use the provided screws or appropriate fasteners, driving them into the pre-drilled holes around the base's perimeter. Ensure you're driving the screws into a stud or joist for maximum support.

After securing the base, apply a bead of silicone caulk around the perimeter. This creates a watertight seal, preventing leaks and moisture damage. Allow the caulk to dry completely before proceeding.

Connecting the Plumbing

how delta custom shower works in 4 steps info sheet with instructions on how to install it
how delta custom shower works in 4 steps info sheet with instructions on how to install it

With the base installed, it's time to connect your plumbing. Consult your Delta shower base's instructions for specific connection details, as they may vary depending on the model.

In general, you'll connect the drain and water supply lines. Use plumber's putty or a drain gasket to create a watertight seal around the drain. Tighten connections securely but avoid over-tightening to prevent damage.

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Testing the Connections

Before turning your water supply back on, perform a test run. Fill the shower base with water, checking for any leaks around the drain or supply lines. If everything is watertight, drain the water and proceed.

If you notice any leaks, tighten the connections further or apply additional caulk as needed. Once you're confident there are no leaks, turn your water supply back on and test the shower again.

Final Touches

With the shower base installed and tested, it's time for the final touches. Apply a bead of silicone caulk around the top edge of the base, creating a seal with the surrounding walls or shower pan. This prevents water from seeping behind the base and causing damage.

Allow the caulk to dry completely before using your shower. This ensures a watertight seal and protects your new Delta shower base from potential damage.

Congratulations! You've successfully installed your Delta shower base. Enjoy your updated bathroom and the peace of mind that comes with a high-quality, professionally installed shower base. If you have any questions or need further assistance, don't hesitate to reach out to Delta's customer support.