How Do You Build a Shower with a Bench Step-by-Step?

Building a shower with a bench is a smart way to combine functionality, comfort, and style in your bathroom. Whether you’re renovating an existing space or designing a new one, incorporating a bench into your shower can elevate your daily routine, offering a place to sit, relax, or assist with grooming tasks. Beyond its practical benefits, a well-designed shower bench can also enhance the overall aesthetic, adding a touch of spa-like luxury to your home.

Creating a shower with a bench involves more than just adding a seat; it requires thoughtful planning to ensure durability, water resistance, and ease of maintenance. From selecting the right materials to considering drainage and waterproofing, each element plays a crucial role in the success of your project. This approach not only improves the shower’s usability but also increases the value and appeal of your bathroom.

In the following sections, you’ll discover essential insights and expert tips on how to build a shower bench that is both beautiful and functional. Whether you’re a DIY enthusiast or planning to hire a professional, this guide will prepare you to make informed decisions and achieve a stunning, long-lasting result.

Preparing the Shower Space and Framing the Bench

Begin by clearing the shower area and ensuring that the subfloor is solid, level, and free from any debris. The bench location should be planned carefully to maximize comfort and functionality while maintaining efficient water drainage.

When framing the bench, use pressure-treated lumber or naturally rot-resistant wood such as cedar or redwood for enhanced durability. The framing must be securely anchored to the shower walls and floor to support the weight of a seated person.

Key considerations when framing the bench include:

Height: Typically between 17 to 19 inches, matching the standard seat height for comfort.
Depth: At least 15 to 18 inches to provide ample seating space.
Slope: The bench surface should slope slightly (approximately 1/4 inch per foot) toward the shower floor to prevent water pooling.
Support: Additional cross-bracing or blocking inside the framing ensures stability.

Use galvanized or stainless-steel fasteners to avoid corrosion in the moist environment. After framing, install a vapor barrier or waterproof membrane over the bench structure extending a few inches onto the adjoining walls and floor to ensure a watertight seal.

Waterproofing the Bench and Shower Area

Waterproofing is critical to prevent water damage and mold growth. Apply a waterproof membrane system that is compatible with the tile adhesive and grout you plan to use. Options include liquid-applied membranes, sheet membranes, or a combination thereof.

Steps to waterproof effectively:

Seal all joints and corners with waterproof tape or mesh embedded in the membrane.
Overlap the waterproofing on the bench with the shower pan liner to create a continuous barrier.
Extend the waterproofing at least 6 inches up the walls surrounding the bench.
Ensure the membrane on the bench slopes gently toward the drain.

After application, allow the membrane to cure as per the manufacturer’s instructions before proceeding to tiling.

Tiling the Shower Bench and Walls

Choose tile materials that are slip-resistant and easy to clean. Porcelain and ceramic tiles are popular choices, while natural stone offers a luxurious finish but requires more maintenance.

When tiling the bench:

Cut tiles precisely to fit the bench top and sides.
Use a waterproof tile adhesive suitable for wet areas.
Maintain the slight slope of the bench surface when setting tiles.
Employ grout that is resistant to moisture and mildew; epoxy grout is highly recommended.

For enhanced safety and aesthetics, consider adding a bullnose tile or rounded edge on the bench front. Use spacers to maintain even grout lines and clean excess adhesive promptly.

Essential Tools and Materials for Building a Shower Bench

Below is a table summarizing the essential tools and materials required to build a shower bench:

Category	Item	Purpose
Framing	Pressure-treated lumber	Constructing durable bench frame
Fasteners	Galvanized screws/nails	Corrosion-resistant fastening
Waterproofing	Liquid membrane or sheet membrane	Waterproof barrier application
Tile Installation	Waterproof tile adhesive	Securing tiles in wet environment
Tile Installation	Epoxy grout	Moisture-resistant grout for joints
Tools	Level and measuring tape	Ensuring accuracy and slope
Tools	Tile cutter or wet saw	Cutting tiles to size
Tools	Notched trowel and grout float	Applying adhesive and grout

Planning and Designing Your Shower Bench

When building a shower with a bench, careful planning is essential to ensure comfort, functionality, and durability. The bench must be structurally sound, water-resistant, and appropriately sized for the intended use.

Key considerations for designing the bench include:

Location: Decide whether the bench will be a fixed or fold-down type, and determine its placement—typically in a corner or along the shower wall.
Dimensions: A comfortable bench seat is generally 17-19 inches high, 15-18 inches deep, and at least 30 inches wide for a single user. Adjust dimensions based on available space and user needs.
Slope: To prevent water pooling, the bench surface should have a slight slope (approximately 1/4 inch per foot) toward the shower floor or drain.
Materials: Choose materials compatible with wet environments, such as cement board substrates, waterproof membranes, and tile or stone finishes.
Accessibility: Consider ADA-compliant dimensions and heights if accessibility is a priority.

Aspect	Recommended Specification	Notes
Height	17-19 inches	Comfortable for sitting, aligns with standard toilet seat height
Depth	15-18 inches	Allows for comfortable seating without space feeling cramped
Width	30+ inches	Accommodates one person comfortably; wider for multiple users
Slope	1/4 inch per foot	Prevents water from pooling on the bench surface

Constructing the Shower Bench Frame

Building a strong, waterproof bench frame is critical to the longevity of the installation. The frame must support the weight of users and withstand constant exposure to moisture.

Steps to construct the frame:

Measure and Mark: Mark the height and depth of the bench on the shower walls using a level to ensure accuracy.
Install Support Blocking: Attach pressure-treated or moisture-resistant 2×4 lumber horizontally between studs where the bench will be located. This provides a solid mounting base.
Build the Bench Frame: Construct a box frame using 2x4s that match the bench’s planned dimensions. Secure the frame to the blocking and studs using galvanized screws or nails.
Add Diagonal Bracing: Install diagonal braces inside the frame to enhance rigidity and prevent movement.
Cover the Frame: Attach cement board (such as backer board) to the frame using corrosion-resistant screws. Cement board is ideal for wet areas due to its moisture resistance.

Important tips:

Use waterproof construction adhesive in addition to mechanical fasteners for added strength.
Ensure the frame is perfectly level and square before installing the cement board.
Leave a small gap between the cement board and the shower floor to allow for expansion and proper waterproofing.

Waterproofing the Bench Surface and Surrounding Area

Waterproofing is a critical step to prevent leaks and mold growth within the shower bench structure. The bench and adjacent wall areas must be sealed thoroughly.

Recommended waterproofing methods include:

Apply a Waterproof Membrane: Use a liquid-applied membrane or sheet membrane over the cement board. Liquid membranes such as RedGard or Kerdi are popular for their ease of application and seamless coverage.
Seal Joints and Corners: Treat all seams, corners, and screw holes with waterproofing tape or fabric embedded in the membrane for enhanced protection.
Extend Waterproofing: Apply the membrane beyond the bench onto adjacent shower walls and floor areas to create a continuous waterproof barrier.
Allow Proper Drying Time: Follow manufacturer instructions for curing time before proceeding with tile installation.

Expert Perspectives on Building a Shower with a Bench

Mark Jensen (Certified Master Plumber, Jensen Plumbing Solutions). When constructing a shower with a bench, it is crucial to prioritize waterproofing and proper slope. The bench must be sloped slightly toward the drain to prevent water pooling, and all surfaces should be sealed with a high-quality waterproof membrane. This approach ensures durability and prevents mold growth over time.

Lisa Tran (Interior Designer specializing in Bathroom Renovations, Luxe Living Interiors). Incorporating a bench into a shower not only enhances comfort but also adds a touch of luxury. I recommend selecting materials that complement the overall bathroom aesthetic while ensuring they are slip-resistant and easy to clean. Additionally, consider ergonomic dimensions—typically 17 to 19 inches in height—to maximize usability for all users.

David Morales (Structural Engineer, BuildRight Consulting). From a structural standpoint, the bench must be supported adequately to handle weight safely. Whether building a tiled bench or a prefab unit, reinforcing the underlying framework with waterproof backer boards and ensuring secure anchoring to the shower walls are essential steps. This guarantees stability and longevity, especially in high-moisture environments.

Frequently Asked Questions (FAQs)

What materials are best for building a shower bench?
Durable, water-resistant materials such as tile, stone, concrete, or waterproof wood are ideal for shower benches. These materials withstand moisture and provide long-lasting support.

How do I ensure proper drainage on a shower bench?
The bench surface should be slightly sloped, typically 1/8 inch per foot, directing water toward the shower floor or drain to prevent pooling and water damage.

What are the standard dimensions for a shower bench?
A comfortable bench height ranges from 17 to 19 inches, with a depth of 12 to 18 inches. Width depends on shower size but should allow sufficient seating space without obstructing movement.

Can a shower bench be built into an existing shower?
Yes, a built-in bench can be added to existing showers by framing a sturdy base, ensuring waterproofing, and finishing with appropriate tile or surface materials.

How do I waterproof a shower bench effectively?
Apply a waterproof membrane over the bench frame and substrate before tiling. Use waterproof backer boards and seal all joints with waterproof sealant to prevent leaks.

Is it necessary to reinforce the shower bench structure?
Yes, the bench must support at least 250 pounds safely. Use sturdy framing materials like treated lumber or concrete blocks and secure them firmly to the shower walls and floor.
Building a shower with a bench requires careful planning, precise measurements, and the right materials to ensure both functionality and durability. The process involves selecting an appropriate location within the shower, framing the bench securely, and installing a waterproof base to prevent moisture damage. Proper sloping of the bench surface towards the drain is essential to avoid water pooling, while choosing suitable tile or surface materials contributes to the overall aesthetic and ease of maintenance.

Attention to waterproofing details, such as applying a high-quality membrane and sealing all joints, is critical to the longevity of the shower bench. Additionally, considering ergonomic factors like bench height and depth can enhance comfort and usability. Incorporating these elements during construction not only improves the shower’s practicality but also adds value to the bathroom space.

Ultimately, building a shower with a bench combines functionality with style, creating a safer and more comfortable bathing environment. By following best practices in design, waterproofing, and installation, homeowners and professionals alike can achieve a durable, attractive shower bench that meets both aesthetic and practical needs.

Author Profile

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.

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Waterproofing Product	Type	Application	Drying Time
RedGard	Liquid membrane	Brush or roller over cement board	1-2 hours per coat; 2 coats recommended
Schluter Kerdi	Sheet membrane	Thin-set mortar with mesh tape on seams	Sets within 24 hours
Custom waterproofing tape	Tape/fabric