HardieBacker, often referred to as HardieBacker board, is a popular brand of cement backer board used as a reliable substrate in construction and remodeling projects. Composed of cement, sand, and reinforcement fibers, it provides exceptional strength, moisture resistance, and stability, making it an ideal underlayment for ceramic tiles, porcelain tiles, and natural stone tiles in areas such as bathrooms, kitchens, and floors. Its durable and non-combustible properties also make it suitable for exterior wall sheathing, fire-rated assemblies, and high-moisture environments like showers and steam rooms. HardieBacker board is available in various thicknesses and is widely appreciated for its ability to prevent tile cracking and ensure long-lasting, secure installations.

HardieBacker is often used in pizza oven installations as the bottom form holding the Concrete Hearth, and as the material that defines the exterior walls of wall and roof Oven Enclosures. Typically installed with Metal Studs.