Building waterproof backing board is a composite building material integrating waterproofing, moisture resistance, thermal insulation, sound insulation, and structural reinforcement. It is specifically developed for various damp, high-humidity, and water-adjacent building conditions and is widely applicable to home kitchens and bathrooms, balconies and basements, hotel swimming pools, hospital restrooms, outdoor terraces, and various industrial moisture-proof enclosure projects. Compared to traditional gypsum board, ordinary cement board, and multi-layer waterproofing construction processes, this integrated board offers more stable performance, easier construction, and a longer service life. It fundamentally solves common engineering problems in damp areas such as mold growth, efflorescence, tile hollowing and detachment, and base layer deformation and cracking. It is the preferred building material for modern dry and wet area decoration and overseas trade projects.
Superior waterproofing and moisture resistance are the core highlights of the building waterproof backing board. The board uses high-density XPS closed-cell extruded core material with extremely high closed-cell rate and extremely low water absorption rate, achieving long-term water and moisture resistance, completely different from the drawbacks of ordinary boards that absorb moisture, swell, and powder when exposed to water. The integrated composite structure of the panels provides bidirectional moisture barrier, preventing both external water accumulation and shower moisture from seeping inwards, as well as preventing underground moisture from seeping back upwards. Even under prolonged exposure to waterlogging, high salt spray, or humid conditions during the rainy season, it will not develop mold, delamination, deformation, or efflorescence. Thanks to its strong waterproofing capabilities, construction eliminates the need for additional waterproof coatings or waterproof membranes, completing the base waterproofing in one step, effectively simplifying the construction process and avoiding the leakage risks associated with multi-layer construction.
The panels also possess excellent thermal insulation properties, resulting in outstanding energy savings. The XPS core material has an extremely low thermal conductivity, providing excellent thermal insulation. When laid on walls and floors, it effectively blocks the exchange of hot and cold air between indoors and outdoors, reducing indoor heat loss and preventing the penetration of high outdoor temperatures, significantly reducing the energy consumption of air conditioning, underfloor heating, and other equipment. Whether for indoor insulation in cold regions or heat insulation and cooling in hot regions, it provides stable performance, meeting the construction standards and development needs of green and energy-saving buildings both domestically and internationally.
In terms of structural performance, the building waterproof backing is lightweight and high-strength, suitable for most building construction scenarios. The board's weight is significantly lower than traditional cement fiberboard, making it lightweight and easy for a single person to handle, cut, and install, greatly saving labor costs. Simultaneously, the board boasts excellent compressive and flexural strength, with a surface composite alkali-resistant fiberglass mortar layer, resulting in a stable structure, wear resistance, and impact resistance. It is less prone to dents and cracks after being covered with ceramic tiles, slabs, stone, or other finishing materials, effectively improving the structural stability of walls and floors. It is particularly suitable for construction scenarios with limited load-bearing capacity, such as older buildings and light steel villas, without increasing the building's structural load.
Excellent sound insulation and vibration damping properties further enhance the comfort of building use. The board's dense closed-cell structure effectively absorbs airborne noise, reducing the transmission of water flow noise, equipment operation noise, and environmental noise. At the same time, the elastic core material buffers structural vibrations and blocks transmitted noise from footsteps and heavy object impacts, making it perfectly suited for building scenarios requiring sound insulation, such as apartments, hotels, hospitals, and equipment rooms, optimizing the indoor living and working environment.
The board's installation is convenient and efficient, significantly shortening the construction period and reducing construction costs. The boards are suitable for dry construction methods, eliminating the need for wet work with cement mortar. On-site cutting, hole drilling, and grooving can be easily achieved using a utility knife and handsaw, facilitating precise construction such as pipe pre-installation, irregular joint finishing, and pipe edging. The operation is simple and produces minimal dust. The board surface features a rough, non-slip mortar layer, requiring no additional interface treatment. Various decorative tiles and stones can be directly thinly applied, or putty and latex paint can be applied, saving multiple construction steps and effectively shortening the construction period and saving labor and material costs compared to traditional methods. Furthermore, the boards exhibit excellent stability under cold, heat, dry, and wet cycles, with low expansion and contraction, making them resistant to warping, cracking, and deformation. Combined with specialized waterproof sealing tape and sealant to seal gaps, the integrity of the construction is further ensured, preventing future leaks.
The product range is extensive and highly adaptable, meeting diverse construction needs. The boards are available in standard, uniform dimensions, with thicknesses ranging from 6mm to 50mm. Thinner boards are suitable for standard wall finishes in kitchens, bathrooms, and balconies, while thicker boards can be used in long-term water-bearing areas such as swimming pool floors and basement walls. They are suitable for various damp conditions in residential, commercial, and industrial construction projects. The boards offer excellent compatibility, compatible with various tile adhesives, stone adhesives, and putties/paints without bonding issues, meeting diverse decoration and enclosure needs.
Regarding environmental protection and safety, the building waterproofing backing boards meet stringent quality standards and strict compliance requirements. The products are manufactured using formaldehyde-free and asbestos-free environmentally friendly raw materials, ensuring green and pollution-free production. They have passed multiple environmental tests, meeting domestic and international green building material standards, and are readily exportable. The boards exhibit excellent flame retardant properties; standard models meet the B1 fire-retardant standard, while A-grade flame-retardant versions can be customized for public buildings such as shopping malls, schools, and hospitals. They do not easily spread fire when exposed to open flames, produce no toxic fumes or molten drips, and can successfully pass various building fire safety inspections. Meanwhile, the board is resistant to freeze-thaw cycles, acids and alkalis, and corrosion, resisting long-term erosion from swimming pool disinfectants, kitchen and bathroom cleaners, and coastal salt spray. With a service life of over 25 years, it requires almost no maintenance or renovation, significantly reducing building repair costs.
For bulk export scenarios, this board also offers significant advantages. Its integrated, multi-functional design can replace multiple materials for waterproofing, insulation, and base support, simplifying building material categories and reducing ocean freight logistics costs. It is packaged with a protective film and wooden pallets at the factory, providing moisture and impact protection, and withstanding long-distance sea turbulence and condensation inside the ship, ensuring a high delivery rate. The product comes with complete testing reports and qualification documents, meeting the acceptance and customs clearance requirements of various countries. Sufficient stock and stable delivery times are available. Customized specifications and OEM services are supported, making it suitable for long-term bulk purchasing partnerships with various global engineering contractors and building material distributors.
