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

Building a shower bench is a practical and stylish way to enhance your bathroom’s functionality and comfort. Whether you’re looking to add a convenient spot for sitting, shaving, or simply relaxing under the warm spray, a well-crafted shower bench can transform your daily routine. Beyond its utility, a shower bench can also elevate the aesthetic appeal of your space, blending seamlessly with your existing design while providing lasting durability.

Creating a shower bench tailored to your needs might seem daunting at first, but with the right approach and materials, it becomes an achievable DIY project. From selecting the ideal size and shape to choosing moisture-resistant materials, there are several important factors to consider before construction begins. Understanding these foundational elements will help ensure your bench is both safe and comfortable, standing up to the humid environment of a shower.

In the following sections, we’ll explore the essential steps and tips for building a shower bench that suits your style and space. Whether you’re a seasoned DIY enthusiast or a beginner looking to add a personal touch to your bathroom, this guide will provide the insights needed to create a beautiful, functional bench you’ll enjoy for years to come.

Choosing Materials for Your Shower Bench

Selecting the right materials for your shower bench is crucial for durability, safety, and aesthetic appeal. Since the bench will be exposed to moisture and frequent use, materials must be water-resistant, non-porous, and easy to clean. Additionally, consider comfort and weight support when choosing materials.

Common material options include:

Teak Wood: Naturally water-resistant and durable, teak is a popular choice for shower benches. Its natural oils repel water, preventing warping and mold growth. It also offers a warm, natural look.
Marine-Grade Plywood: Treated plywood designed for wet environments, often used as a structural base. It requires a waterproof top layer such as tile or stone.
Solid Surface Materials: Composites like Corian or cultured marble provide a seamless, non-porous surface that resists water and stains. These materials are easy to maintain and come in various colors.
Tile and Stone: Durable and waterproof, but require proper sealing to prevent water damage and mildew growth in grout lines.
PVC or Plastic Composites: Lightweight, waterproof, and low maintenance. Suitable for simple, functional benches but may lack the aesthetic appeal of wood or stone.

When choosing materials, prioritize:

Water resistance and durability
Slip resistance for safety
Comfort (smooth edges, warm surface)
Maintenance requirements
Visual compatibility with your existing shower design

Constructing the Frame and Support Structure

A strong, stable frame is essential for a safe shower bench. The frame typically consists of wood or metal supports anchored securely to the shower walls or floor. Proper framing ensures the bench can support substantial weight without flexing or shifting.

Key considerations for constructing the frame:

Use pressure-treated lumber or water-resistant materials to prevent rot.
Anchor the frame to wall studs whenever possible for maximum stability.
Include cross-bracing to eliminate wobbling.
Ensure the frame height suits user comfort, typically between 17 to 20 inches.

A basic construction process includes:

Measuring and cutting lumber to the desired bench dimensions.
Installing vertical supports anchored into studs with heavy-duty screws or bolts.
Adding horizontal supports and cross braces to form a sturdy base.
Checking for level and stability before proceeding to the seat surface.

Installing the Bench Surface

The bench surface must be comfortable, slip-resistant, and waterproof. Depending on your chosen materials, installation methods vary.

For wooden benches:

Sand the surface smooth and apply a water-resistant finish such as marine varnish or oil.
Round the edges to reduce sharp corners.
Use stainless steel screws to prevent rust.

For tiled benches:

Apply a waterproof membrane over the frame.
Install cement backer board as a substrate.
Use thin-set mortar to affix tiles.
Seal grout lines thoroughly after installation.

For solid surface or stone benches:

Secure the slab to the frame with appropriate adhesive.
Seal edges with waterproof caulk to prevent water infiltration.

Important Considerations for Safety and Maintenance

Safety and maintenance are paramount in shower bench construction. A bench that is sturdy but slippery or difficult to clean can pose risks.

Best practices include:

Installing slip-resistant surfaces or adding rubberized mats.
Ensuring proper slope or drainage to prevent water pooling.
Regularly inspecting for mold, mildew, or damage.
Using waterproof sealants and reapplying them as needed.
Avoiding materials prone to splintering or cracking.

Material	Water Resistance	Maintenance	Pros	Cons
Teak Wood	High (natural oils)	Periodic oiling or sealing	Durable, attractive, warm surface	Higher cost, requires upkeep
Marine-Grade Plywood	Moderate (needs waterproof covering)	Minimal if covered properly	Strong structural base, cost-effective	Must be sealed, vulnerable if exposed
Solid Surface (Corian)	High (non-porous)	Easy cleaning	Seamless, customizable, low maintenance	Can be costly, less heat resistant
Tile and Stone	High (with sealant)	Requires grout sealing	Durable, elegant appearance	Grout can harbor mold, slippery if polished
PVC/Plastic Composites	High	Very low	Waterproof, lightweight	Less aesthetic appeal, can feel cold

Planning and Designing Your Shower Bench

Before beginning construction, it is essential to plan the shower bench’s dimensions, materials, and placement to ensure functionality, safety, and aesthetic harmony with the shower space.

Key considerations include:

Bench Dimensions: A comfortable bench height typically ranges between 17 to 19 inches, with a depth of 15 to 18 inches. Ensure the width fits your shower layout, generally between 20 to 48 inches.
Placement: Choose a location that does not obstruct shower doors or fixtures. Corners or along one wall are common choices.
Material Selection: Opt for water-resistant, durable materials such as teak, cedar, stone, or engineered waterproof composites.
Drainage and Slope: Design the bench with a slight slope (about 1/8 inch per foot) toward the shower floor to prevent water pooling.
Support Structure: Ensure the bench can support at least 250 pounds for safety.

Material	Advantages	Considerations
Teak	Natural water resistance, warm appearance, durable	Requires periodic oiling to maintain finish
Concrete	Highly durable, customizable shape, waterproof when sealed	Heavy, requires professional installation
Tile over mortar	Customizable design, integrates with shower walls	Grout maintenance needed, potential for water intrusion if not sealed properly
Acrylic or Solid Surface	Seamless, easy to clean, water resistant	Can be expensive, prone to scratches

Constructing the Shower Bench Frame

A robust frame is crucial for structural integrity and long-term durability of the bench. Follow these steps to build a reliable base:

Materials Needed: Use pressure-treated lumber or marine-grade plywood for framing to resist moisture damage.
Wall Attachment: Secure the frame to wall studs with galvanized or stainless steel screws to prevent rust.
Frame Dimensions: Build a rectangular frame matching the planned bench size, ensuring the height is precise.
Reinforcement: Add cross braces within the frame for added strength and to prevent sagging.
Waterproofing Preparation: Before applying surface materials, cover the frame with a waterproof membrane such as a liquid-applied waterproofing product or waterproof backer board.

Example framing structure:

Component	Material	Typical Dimensions	Purpose
Side Supports	2×4 Pressure-treated Lumber	Cut to bench height (17-19″)	Vertical support and attachment to wall studs
Front Frame	2×4 Lumber	Length of bench width	Provides front edge support
Cross Braces	2×4 Lumber	Spaced every 12-16 inches	Prevents frame sagging under weight
Top Platform	Marine-grade Plywood or Cement Board	Bench surface size	Base for surface finish materials

Applying Waterproofing and Surface Finish

Ensuring the bench is fully waterproofed is critical to prevent mold, rot, and structural failure.

Waterproofing Steps:
- Apply a waterproof membrane over the entire frame and top platform. Liquid waterproofing membranes, such as RedGard, provide seamless coverage.
- Install cement backer board over the frame as a durable substrate for tile or stone.
- Seal all joints and corners with waterproof tape or sealant to create a continuous barrier.
Surface Options:
- Tiling: Choose porcelain or natural stone tile with matching grout. Use epoxy grout for enhanced water resistance.
- Wood Bench: For teak or cedar, sand and treat the wood with waterproof oil or sealant designed for wet environments.
- Solid Surface: For acrylic or engineered stone, follow manufacturer instructions for installation and sealing.