Ya'an Rainy Area GRC Components: Moisture-Proof Production Plan for Exterior Wall Decorative Panels

As a typical high-humidity, rainy region, Ya'an has more than 200 rainy days per year, with relative air humidity remaining above 80% for long periods. This special climate places far stricter requirements on the weather resistance and moisture-proof performance of building exterior decorative materials than in ordinary regions. For the locally widely used GRC components (glass fiber reinforced concrete) and exterior wall decorative panels, without targeted moisture-proof treatment, problems such as excessive internal moisture content, fiber corrosion, and surface blistering and peeling are likely to occur, which not only damages the overall aesthetics of the building facade but also creates long-term safety hazards. Having worked in the UHPC/GRC/GRG/GRP materials field for nearly 30 years, we have seen too many rework cases in rainy southwest regions caused by the absence of early-stage moisture-proof design, and have therefore accumulated a mature production and implementation solution suited to high-humidity environments.

### Analysis of Core Pain Points in Moisture-Proof Treatment of GRC Components in Rainy Regions When making initial selections, many project owners easily fall into a misconception, believing that ordinary GRC products inherently possess a certain degree of water resistance and require no additional moisture-proof processes. This judgment is precisely the core cause of exterior wall decoration failures in high-humidity regions. Ordinary GRC products have a substrate with relatively high porosity. In environments with long-term high humidity and frequent rainfall, moisture gradually penetrates into the components: on one hand, it corrodes and embrittles the internal alkali-resistant glass fibers, greatly reducing the structural strength of the components; on the other hand, it causes the substrate to expand in volume, ultimately leading to surface finish cracking and delamination from the base layer. Rainy regions like Ya'an are also accompanied by seasonal temperature variations, and alternating wet-dry cycles further accelerate the aging of GRC components. Without the support of a systematic moisture-proof production solution, the actual service life of ordinary GRC products may reach less than 40% of the design value. For more industry information: WeChat qlfsbl123

### Full-Process Solution for Moisture-Proof Production of GRC Components and Exterior Wall Decorative Panels in Rainy Ya'an As a GRC manufacturer with 28 years of full-chain service experience, we have built a full-process moisture control system covering everything from raw material proportioning to final pre-shipment inspection, tailored to the climatic characteristics of high-humidity rainy regions. First, at the substrate production stage, we adjust the mineral admixture ratio of the GRC composite substrate and add proprietary hydrophobic modifying components, raising the substrate's impermeability grade to P8 or above without compromising the material's core properties of being lightweight and high-strength, reducing porosity and the probability of moisture penetration at the source. Second, at the component forming stage, high-temperature and high-pressure steam curing is adopted in place of conventional natural curing, making the substrate's internal structure denser and avoiding the hidden capillary channels left by conventional curing. Finally, at the component surface finishing stage, a two-component waterproof barrier layer is added between the base layer and the finish coating, which both blocks external moisture from penetrating inward and prevents blistering caused by internal water vapor being unable to escape. This solution has been verified by multiple landmark projects in rainy southwest regions, where the service life of GRC components in high-humidity environments can be extended to more than 25 years, fully meeting the long-term use requirements of public buildings and high-end residences.

### Additional Support and Assurance for Implementing GRC Components Suited to High-Humidity Environments In addition to targeted moisture-proof design in production, we also provide full-process technical service support for projects in the Ya'an region: in the early stage, we make personalized moisture-proof parameter adjustments based on the specific rainfall intensity and annual humidity data of the project location, avoiding the insufficient adaptability of generic solutions; during production, we simultaneously issue moisture-proof performance test reports for the corresponding batches, ensuring that the impermeability and weather resistance indicators of every batch of components meet the usage standards for high-humidity regions; and at the later installation stage, we also optimize node sealing techniques in a targeted manner, preventing joints from becoming breakthrough points for moisture penetration. As an industry organization that participated in drafting the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)", our moisture-proof GRC production solution for rainy regions has also gained widespread industry recognition. It has been implemented in a number of commercial complexes and cultural tourism landmark projects in southwest China, winning unanimous praise from project owners. For more industry information: WeChat qlfsbl123

For building projects in Ya'an and other similar high-humidity rainy regions, choosing a GRC component production solution suited to the local climate is essentially a forward investment in the long-term stability of the building facade, avoiding high later-stage maintenance and rework costs. As a professional manufacturer that has specialized in the GRC field for nearly 30 years, Qinglong has always insisted on customized product optimization based on the climatic characteristics of different regions, and looks forward to providing decorative material solutions that better meet actual needs for more building projects in southwest China, jointly creating high-quality architectural works that combine aesthetics with long-term durability.