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Waterproof Backing Board for Bathroom is a building material that integrates waterproofing, load-bearing capacity, heat insulation, and mildew resistance. It is suitable for laying on the base of ceramic tiles, stone, and other decorative materials, and is suitable for humid environments such as bathrooms and shower rooms. Waterproof Backing Board for Bathroom has a composite structure. The core material is extruded polystyrene (XPS) with a closed-cell rate of over 99%, forming a sealed structure that prevents moisture penetration at the source. Alkali-resistant high-strength fibers are used on both sides of the core material, improving the board's flexural and impact resistance and preventing cracking of the surface due to uneven stress after installation. The surface is covered with a coating that enhances adhesion to tile adhesive and further strengthens the surface's waterproofing.
Compared to traditional cement backing boards and gypsum boards, waterproof backing boards for bathrooms offer several advantages.
Waterproofing: The XPS core material has a water absorption rate of <0.8%, and the joints can be sealed with a snap-lock system and specialized sealant for seamless waterproofing, preventing dampness and leaks.
High Load-Bearing Capacity and Stability: With a compressive strength exceeding 400 kPa, it can withstand long-term loads from ceramic tiles, stone, and other finishes. Its coefficient of thermal expansion is ≤0.5×10⁻⁶/K, making it resistant to deformation and warping under varying temperature and humidity.
Lightweight and Easy to Install: Significantly lighter than cement boards of the same thickness, and the boards can be cut directly without specialized tools, improving installation efficiency.
Multifunctional Integration: Combining insulation, soundproofing, and mildew resistance, it can replace separate insulation and soundproofing layers, reducing construction steps and costs.
Environmentally Friendly and Durable: The product uses brand-new materials with strict quality control. It is also highly corrosion-resistant, maintaining stability even in humid and corrosive environments.
To meet the diverse needs of our clients, we offer customized waterproof backing board services for bathrooms, precisely matching materials, specifications, and functions to meet their specific requirements. Size customization: The standard size is 1220×2440mm, but can be adjusted to non-standard sizes according to client needs. We also support irregular shapes, such as curved and trapezoidal boards, suitable for bathroom corners and bathtub edges. Thickness customization ranges from 6mm to 50mm, with 6-12mm suitable for lightweight finishes like ceramic tiles, 15-25mm suitable for load-bearing areas, and 30-50mm suitable for use as partition walls or insulation layers. We have a standardized customization process that is simple, efficient, and precisely meets client needs. The specific process includes: needs communication, material/specification/functionality confirmation, sample production, and logistics transportation, ensuring timely, high-quality, and sufficient delivery to the destination.
If you have any recent needs for purchasing waterproof backing boards for bathrooms and would like to learn more about our products or related customization details, we can provide you with one-stop service. Please feel free to contact us anytime!



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