How Can You Build a Bench in Your Shower Step-by-Step?

AvatarBySusan Benton General Bath Queries

Adding a bench to your shower is a smart way to enhance both comfort and functionality in your bathroom. Whether you’re looking to create a relaxing spot to sit while you shower, a convenient place to shave or store toiletries, or simply want to elevate the overall aesthetic, building a bench can transform your daily routine. With the right approach, a shower bench can be a stylish and practical addition that suits your space perfectly.

Building a bench in the shower involves more than just placing a seat inside the enclosure. It requires careful consideration of materials, waterproofing, and design to ensure durability and safety in a wet environment. From choosing the right structure to integrating it seamlessly with your existing shower layout, the process balances craftsmanship with practical know-how.

In the following sections, you’ll discover the essential steps and expert tips to guide you through constructing a shower bench that meets your needs and complements your bathroom. Whether you’re a seasoned DIY enthusiast or a first-time builder, this guide will equip you with the knowledge to create a beautiful and lasting feature in your shower space.

Materials and Tools Required for Building a Shower Bench

Selecting the right materials is crucial to ensure durability, safety, and aesthetic appeal when building a bench in a shower. The bench must withstand constant exposure to water, humidity, and cleaning products without deteriorating or harboring mold.

Common materials include:

  • Waterproof plywood or marine-grade plywood: Provides structural strength and resists warping.
  • Cement backer board (e.g., HardieBacker or Durock): Offers excellent water resistance and a solid base for tile.
  • Waterproof membrane or liquid waterproofing: Applied over the structure to prevent water penetration.
  • Tile or natural stone: Used as the final surface covering, chosen for durability and slip resistance.
  • Silicone caulk: For sealing joints and edges to prevent water infiltration.

Essential tools for the project include:

  • Measuring tape and pencil
  • Level and square
  • Circular saw or jigsaw
  • Drill and screws (preferably stainless steel to prevent rust)
  • Notched trowel (for thin-set application)
  • Grout float
  • Rubber mallet
  • Sponge and bucket for cleaning grout

Constructing the Shower Bench Frame

The bench frame forms the structural foundation and must be securely anchored to wall studs to support weight safely.

  • Measure and mark the bench location on the shower walls, typically at a comfortable sitting height of 17 to 19 inches above the shower floor.
  • Locate and expose wall studs within the shower enclosure to attach the bench frame.
  • Cut pressure-treated lumber or marine-grade plywood into pieces for the bench seat and support braces.
  • Assemble the frame by attaching horizontal supports between the studs at the marked height.
  • Ensure the frame is perfectly level and square, adjusting as necessary before securing it with corrosion-resistant screws.

The frame should extend from the wall studs outward to the desired bench depth, commonly between 12 to 18 inches.

Applying Waterproofing and Surface Preparation

Waterproofing is a critical step to prevent moisture damage and mold growth beneath the bench surface.

  • Cover the entire bench frame with cement backer board, cutting it to size and securing with appropriate screws.
  • Seal all seams and screw holes with fiberglass mesh tape and thin-set mortar.
  • Apply a waterproof membrane over the backer board, extending it onto adjacent shower walls and floor to create a continuous barrier.
  • Allow all layers to dry and cure as per manufacturer instructions before proceeding to tile installation.

This multi-layer approach ensures the bench remains protected from the constant moisture within the shower environment.

Finishing the Bench Surface

The finishing surface not only enhances the bench’s appearance but also contributes to safety and longevity.

  • Select tiles or natural stone with a non-slip finish suitable for wet environments.
  • Mix and apply thin-set mortar evenly using a notched trowel, pressing tiles firmly onto the waterproofed bench surface.
  • Use tile spacers to maintain uniform grout lines.
  • After the adhesive cures, apply grout between tiles and clean excess grout promptly.
  • Seal the grout once dry to improve water resistance.

For added comfort and safety, consider incorporating rounded bench edges and a slight slope (about 1/8 inch per foot) to allow water to drain off easily.

Maintenance Tips for Shower Benches

Proper maintenance extends the life of a shower bench and keeps it hygienic.

  • Clean regularly with mild, non-abrasive cleaners to prevent buildup of soap scum and mildew.
  • Inspect grout and caulk lines periodically for cracks or gaps, repairing promptly to maintain waterproof integrity.
  • Avoid using harsh chemicals or acidic cleaners that can degrade tile sealers and grout.
  • Use a squeegee or towel to remove water from the bench after each use, reducing moisture exposure.
Maintenance Task Frequency Recommended Products
Surface Cleaning Weekly Mild detergent, soft sponge
Grout Sealing Every 6-12 months Penetrating grout sealer
Caulk Inspection Every 3 months Silicone caulk
Water Removal After each use Squeegee, microfiber towel

Choosing the Right Materials for a Shower Bench

Selecting appropriate materials is critical for building a durable and water-resistant bench in a shower. The materials must withstand constant moisture, resist mold and mildew, and provide structural integrity.

  • Waterproof Substrate: Use moisture-resistant backer boards such as cement board or fiberglass panels instead of traditional drywall. These provide a sturdy base and prevent water damage.
  • Framing Lumber: Opt for pressure-treated wood or naturally rot-resistant species like cedar or teak. These materials resist decay in high-humidity environments.
  • Surface Material: Choose tile, natural stone, or solid surface materials for the bench top. Porcelain or ceramic tiles with proper grout and sealant offer excellent water resistance.
  • Adhesives and Sealants: Use waterproof thin-set mortar for tile installation and silicone-based sealants to seal joints and edges, preventing water infiltration.
Component Recommended Material Key Properties
Frame Pressure-treated lumber or cedar Rot-resistant, strong structural support
Substrate Cement backer board or fiberglass panels Moisture-resistant, rigid base for finishing
Bench Surface Porcelain tile, natural stone, solid surface Durable, waterproof, easy to clean
Adhesives/Sealants Waterproof thin-set, silicone caulk Waterproof bonding and sealing

Constructing the Bench Frame and Support

Building a strong, stable frame is essential to support the bench safely and ensure longevity under constant use.

Start by identifying the bench location within the shower enclosure. Ideally, position the bench against existing studs to anchor the frame securely. If necessary, add additional framing to reinforce the area.

  • Measure and Mark: Determine the bench dimensions based on available space and ergonomic comfort. Standard height ranges from 17 to 19 inches, with a depth of 15 to 20 inches.
  • Cut Framing Lumber: Use pressure-treated 2x4s or equivalent lumber for the frame. Cut horizontal support pieces for the top, bottom, and any intermediate supports.
  • Assemble Frame: Attach the horizontal supports to the wall studs using corrosion-resistant screws or nails. Ensure the frame is level and securely fastened.
  • Add Diagonal Bracing: For additional rigidity, add diagonal braces or blocking between vertical and horizontal members.
  • Install Ledger Board: If building a floating bench, fix a ledger board to the wall studs at the desired height, then attach the bench frame to this ledger for support.

Verify the frame’s stability by applying pressure; it should not flex or move. Reinforce any weak points before proceeding to the next step.

Installing the Substrate and Waterproofing

Proper substrate installation and waterproofing are critical to prevent moisture penetration and maintain the bench’s integrity.

  • Attach Backer Board: Cut cement board or fiberglass panels to fit the bench frame. Secure them firmly using corrosion-resistant screws, ensuring joints are tight but not overly compressed.
  • Seal Joints: Apply fiberglass mesh tape over all seams and corners. Use thin-set mortar or waterproof joint compound to cover the tape smoothly.
  • Waterproofing Membrane: Apply a liquid waterproofing membrane or sheet membrane over the entire substrate surface, extending slightly onto the surrounding shower walls and floor. Follow manufacturer instructions for curing times.
  • Inspect Sealing: Ensure all edges, corners, and fastener penetrations are fully covered and sealed to prevent water ingress behind the substrate.

Applying the Finish Surface

The finish surface must be both aesthetically pleasing and functional, providing a safe, waterproof sitting area.

  • Tiling the Bench: Use waterproof thin-set mortar to adhere tile to the substrate. Begin with the bench top, then tile the front and sides to create a seamless look.
  • Grouting: After the tile mortar cures, apply grout between tiles. Use a high-quality, waterproof grout designed for wet environments.
  • Sealing: Once grout is fully cured, apply a penetrating grout sealer to reduce water absorption and prevent staining.
  • Edge Treatment: Install tile trim or bullnose tiles on exposed edges for a polished finish and to protect edges from chipping.
  • Alternative Surfaces: For stone or solid surface tops, ensure proper adhesive and sealant compatibility. Seal natural stone surfaces with appropriate stone sealer.

Ensuring Safety and Comfort Features

Incorporating ergonomic and safety features enhances usability and comfort.

  • Slope the Bench Surface: Slightly slope the bench top (about 1/8 inch per foot) toward the shower drain to prevent water pooling.Professional Insights on How To Build a Bench in a Shower

    Mark Ellis (Certified Bathroom Remodeler, Ellis Home Renovations). Building a shower bench requires careful planning to ensure proper waterproofing and structural integrity. I recommend using cement backer board as the base, covered with a waterproof membrane before tiling. The bench should be sloped slightly toward the shower floor to prevent water pooling, and framing must be reinforced to support weight safely.

    Dr. Linda Chen (Architectural Designer, Bath Innovations Studio). When designing a shower bench, it is essential to consider ergonomics and accessibility. The standard bench height ranges from 17 to 19 inches, providing comfort for most users. Additionally, integrating the bench seamlessly with the shower’s overall waterproofing system is critical to avoid mold and water damage over time.

    James Patel (Licensed Plumber and Shower Specialist, FlowPro Services). From a plumbing perspective, incorporating a bench in the shower must not interfere with proper drainage. I advise ensuring that the bench’s framing does not obstruct the slope of the shower pan and that all joints are sealed correctly. Using materials resistant to moisture and mold will extend the bench’s lifespan and maintain hygiene.

    Frequently Asked Questions (FAQs)

    What materials are best for building a bench in a shower?
    Use waterproof and durable materials such as cement board, marine-grade plywood, or concrete for the bench base. Cover with tile, stone, or waterproof panels to ensure longevity and resistance to moisture.

    How do I ensure proper drainage for a shower bench?
    Slope the bench surface slightly toward the shower drain, typically a 1-2% gradient, to prevent water pooling and promote efficient drainage.

    Can I build a bench in an existing shower without major renovations?
    Yes, you can install a pre-fabricated bench or build a simple framed bench using waterproof materials, but ensure proper sealing and waterproofing to avoid water damage.

    What are the typical dimensions for a comfortable shower bench?
    A standard shower bench is about 17-19 inches high, 15-18 inches deep, and at least 24 inches wide to provide comfortable seating and support.

    How should I waterproof a built-in shower bench?
    Apply a waterproof membrane over the bench frame and substrate before tiling. Use waterproof sealants on all joints and edges to prevent water infiltration.

    Is it necessary to reinforce the shower bench structure?
    Yes, reinforce the bench frame with sturdy materials such as treated lumber or metal supports to safely support weight and ensure durability over time.
    Building a bench in a shower is a practical and stylish addition that enhances both comfort and functionality. The process involves careful planning, selecting appropriate materials that can withstand moisture, and ensuring proper waterproofing to prevent damage. Whether opting for a built-in or a freestanding bench, attention to structural support and drainage is crucial to maintain safety and durability over time.

    Key considerations include choosing water-resistant materials such as tile, stone, or marine-grade plywood, and using waterproof membranes or sealants to protect the underlying structure. Proper slope and drainage design help avoid water pooling, which can lead to mold or deterioration. Additionally, adhering to local building codes and standards ensures the bench is both safe and compliant.

    Ultimately, a well-built shower bench not only adds convenience but also increases the overall value and aesthetic appeal of the bathroom. By following best practices in design, material selection, and installation, homeowners can create a durable, attractive feature that enhances their daily shower experience while minimizing maintenance concerns.

    Author Profile

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    Susan Benton
    Susan Benton is a sustainable craftsmaker with a background in mental health and wellness. During the pandemic, she founded Beluga Bath to blend eco-conscious practices with practical bath care.

    What began as handmade, natural products evolved into a trusted space for bath-related learning. Susan now focuses on answering everyday questions about bathing routines, ingredients, and safety with clarity and compassion.

    Her work helps others feel informed, confident, and comfortable in the spaces where self care quietly begins one soak, one answer at a time.