The performance of waterproof cement boards must comply with national standards such as "Waterproof Building Materials" (GB/T 23457-2017). Key indicators include water absorption rate (usually ≤5%), flexural strength (≥10MPa), and freeze-thaw resistance (no cracking after 50 cycles). When selecting a model, parameters should be determined based on the specific scenario:
Water Absorption Rate: For humid environments (such as bathrooms), it is recommended to choose products with a water absorption rate ≤3% to reduce the risk of expansion and deformation during long-term use.
Thickness: The thickness of boards for walls is generally 6-12mm, while boards for floors need to be thicker (12-20mm) to withstand loads.
Surface Treatment: Smooth surfaces are easier to clean, while rough surfaces can enhance adhesion to the waterproof coating.