April 28, 2025
Are you thinking about renovating your bathroom? Or perhaps you're building one from scratch and wondering how to make it last? One thing is certain for shower walls: proper water resistance is non-negotiable. Forget using regular drywall or plywood; these materials simply can't withstand the constant moisture exposure. Enter concrete boards (also called cement boards)—a game-changer in shower wall construction. This blog will explain why concrete boards are the ultimate choice for shower walls, how they differ from other materials, and what you can expect when installing them. Plus, we’ll share some tips to help you get the most from your investment. What Are Concrete Boards? Concrete boards are made up of cement reinforced by a fiberglass outer mesh. This combination makes them both water-resistant and incredibly durable. Unlike standard drywall or greenboard (a type of moisture-resistant drywall), concrete boards are specifically designed to handle the humid, wet environments of showers, tubs, and kitchens. Their rigid composition ensures they won't break down, rot, or swell when exposed to water. Popular brands like HardieBacker, Durock, and WonderBoard have become go-to standards for professionals and DIYers alike. How Are They Used? Concrete boards are installed as a backing material in showers, beneath tiles. This provides a strong, moisture-resistant surface for the tiles to adhere to. While they aren’t fully waterproof on their own, they don’t promote mold and mildew growth, making them ideal for wet environments when paired with a waterproofing membrane. Why Are Concrete Boards Essential for Shower Walls? 1. Unparalleled Moisture Resistance Showers naturally create a high-moisture environment. Without the proper materials, water can seep into the walls over time, leading to mold growth, structural damage, and expensive repairs. Unlike drywall, which softens when wet, concrete boards hold up against repeated exposure to moisture. Even in cases where minor leaks occur, concrete boards resist water absorption, preventing water from causing deeper damage. That extra layer of protection is something typical drywall or greenboard can't offer. 2. Prevents Mold and Mildew Did you know that mold can start growing in as little as 24 to 48 hours on damp drywall? With their inorganic composition and water-resistant properties, concrete boards significantly reduce the risk of mold or mildew growth. For added protection, experts recommend applying a waterproofing membrane, such as RedGard or a polyethylene sheeting like Schluter Kerdi, over the concrete board before tiling. Together, they create a moisture barrier that keeps your shower walls dry and mold-free for years. 3. Long-Lasting Durability Concrete boards are built to last and can handle the wear and tear of everyday shower use. Because they resist warping, buckling, or breaking under wet conditions, they provide a stable, solid foundation for your tiles. Not only will your tiles adhere better, but they’re much less likely to crack or loosen over time. This durability also means fewer repairs and more peace of mind for homeowners. 4. Fire Resistance Beyond water resistance, concrete boards offer added fire resistance. While rare, fires in bathrooms can happen due to faulty wiring or appliances (like space heaters). Concrete boards are non-combustible, providing an extra layer of safety for your home. 5. Easy Integration With Tiling Tiles lead the pack in terms of aesthetics and moisture-wicking properties for shower walls. Thankfully, concrete boards provide the perfect “underlayment” for tile installation. Tiles adhere firmly to concrete board surfaces due to their rough texture, making it easier to achieve that polished, high-end finish you’re after. Want to know the secret behind flawless shower wall tile designs? It almost always comes down to using the right backing material. How Do Concrete Boards Compare to Alternatives? You may be wondering how concrete boards stack up against other materials. Here's a quick breakdown of common options and why concrete boards reign supreme. Drywall Pros : Lightweight, easy to cut, and inexpensive. Cons : NOT water-resistant. Regular drywall is the worst option for showers since it absorbs moisture and breaks down quickly. Greenboard Pros : Slightly water-resistant, less prone to mold than regular drywall. Cons : Not designed for direct water exposure. While better than standard drywall, greenboard still lacks long-term durability in shower environments. Foam Backer Boards Pros : Lightweight, fully waterproof, and simple to cut. Cons : Expensive and less impact-resistant than concrete boards. Concrete Boards Pros : Affordable, durable, mold-resistant, impact-resistant, and designed for wet environments. Cons : Heavier than other options, requires waterproofing with a membrane. When balancing cost, durability, and moisture resistance, concrete boards strike the perfect balance for most homeowners and professionals. How to Install Concrete Boards for Shower Walls Installing concrete boards isn’t difficult if you follow these basic steps. Here’s a quick overview for DIYers. Measure and Cut the Boards Use a utility knife or scoring tool to cut concrete boards to size. Wear a mask, as cutting concrete boards can create dust. Secure the Boards Attach the boards directly to the wall studs using cement board screws or galvanized nails. Place screws/nails every 8 to 12 inches for secure installation. Tape the Seams Apply fiberglass mesh tape to the seams between boards. Coat the tape with thin-set mortar to create a smooth, uniform surface. Apply Waterproofing While concrete boards are water-resistant, they aren’t completely waterproof. Apply a liquid waterproofing membrane or a sheet membrane for maximum moisture protection. Start Tiling Once your waterproofing layer dries, you’re ready to start laying tiles! Use thin-set mortar as your adhesive for best results. Tips for Maximizing the Longevity of Concrete Boards Always Waterproof : Don’t skip the waterproofing layer. It may add a bit of time to the installation process, but it’s essential for protecting your walls from long-term water damage. Use High-Quality Products : Invest in reputable concrete board brands like HardieBacker or Durock for top-notch performance. Inspect Regularly : Check for cracks, leaks, or damaged tiles periodically to catch potential issues early. Enjoy a Worry-Free Shower for Years to Come Shower walls are one of the most moisture-prone areas of your home, so it’s worth investing in materials that can truly stand the test of time. Concrete boards provide a water-resistant, mold-resistant, and durable foundation for your tiles, ensuring your shower looks great and performs flawlessly. Are you ready to transform your shower walls from risky to resilient? Start your project off right with reliable, long-lasting concrete boards. Whether you're a DIY enthusiast or hiring a professional, now you know why they’re the must-have choice for any moisture-prone area. Say goodbye to water woes, and hello to peace of mind! Bathroom remodeling Austin, bathroom remodeling Austin Tx, Austin bathroom remodeling, bathroom remodelers Austin Premier Bathroom Remodel Austin Austin Tx 78745 512-706-9577 https://www.premierremodelaustin.com/