6mm Waterproof Board

The core structure of the board uses a closed-cell extruded core with a double-sided waterproof mortar protective layer, and the surface layer is embedded with alkali-resistant fiberglass mesh. The entire board has no interconnected water absorption channels, achieving true overall waterproofing. This is fundamentally different from semi-waterproof or low-absorption boards on the market. Even under prolonged immersion and continuous moisture fumigation, the board will not absorb water, swell, soften, or deform, maintaining its dimensional stability. Moisture cannot penetrate the board and corrode the walls and floors behind it, protecting the building structure from water vapor corrosion and preventing the tile adhesive from becoming damp and failing. This significantly extends the overall lifespan of the renovation and reduces the manpower and material costs associated with later repairs.

Many customers are initially concerned about the potential for collapse and cracking after installing stone or thick tiles on lightweight boards. This board features a double-layer crack-resistant reinforcement treatment. The surface mortar combined with fiberglass mesh forms a stable load-bearing layer, providing sufficient impact and pressure resistance to accommodate various surface materials. The board surface is precisely leveled at the factory, eliminating the need for extensive on-site cement mortar leveling. After a simple dust removal, thin tiles can be directly applied, reducing the drying time of wet construction and consequently decreasing labor and material consumption. The board is easy to process; grooving and drilling can be done on-site using ordinary cutting tools, allowing for flexible installation of water and electricity pipes and the creation of niches, lowering the construction threshold.

Construction Precautions (Limitations specific to 6mm): High substrate requirements: The 6mm thickness is relatively thin, making it more dependent on the flatness and rigidity of the underlying substrate. If laid on wooden floors or soft substrates, a full layer of tile adhesive must be applied for thin-set installation, and secure with dense screws to prevent localized bending and tile cracking. Cement-based 6mm boards also require reduced deflection when used in flooring.

Not suitable for single-sided load-bearing walls: 6mm boards have limited overall flexural strength and are not recommended as a single substrate for high-load suspension (such as heavy bathroom hardware). They must be used in conjunction with wooden joists or have expansion bolts inserted into the original wall.

Joint treatment: Regardless of material, leave a 2-3mm gap between boards, and apply alkali-resistant mesh tape and waterproof sealant. XPS board joints especially require special waterproof tape for sealing to prevent moisture from seeping into the original wall.

The entire board installation process is highly forgiving and simple. Leave a 3-5mm expansion gap at board joints to prevent cracking caused by thermal expansion and contraction. After cleaning the gaps, apply the matching waterproof grout mortar, embed fiberglass sealing tape, and smooth it again. All wall-floor junctions and internal/external corners are rounded for a smooth transition, reinforced with widened waterproof sealing strips to strengthen vulnerable areas. Pipes and drains are sealed with flexible waterproof adhesive, eliminating the need for repeated application of thick waterproof membranes, simplifying construction and reducing the risk of leaks due to human error. A variety of thicknesses are available: thinner versions are suitable for standard bathroom walls, while thicker versions can be used for floors and underfloor heating systems. Non-standard sizes can be custom-made according to project drawings.

The factory implements a complete set of outgoing testing procedures. Samples from each batch of boards are randomly selected for waterproof immersion, pressure resistance, and high/low temperature cycle durability tests. Only boards that meet all performance standards are packaged. Each board is printed with a unique model number for easy warehouse classification and project acceptance verification. Individual boards are wrapped in a moisture-proof film, and the outer packaging is thickened and reinforced to prevent moisture and impact damage during domestic short-distance transportation and overseas ocean shipping. A complete set of material testing and environmental certification documents is included with each shipment for convenient domestic project acceptance and overseas customs clearance. We maintain a large inventory of standard specifications and can quickly schedule production for small-batch samples and large-volume orders with large tooling. We also support thicker sheet materials and custom logo printing. We welcome global building material distributors and engineering contractors to discuss long-term cooperation.