With the increasing incidents of high-rise building exterior wall bricks falling, many provinces and cities in China have started to restrict or eliminate the use of exterior wall tiles. In these areas, developers have largely turned to exterior wall coatings for building facades. These coatings are becoming popular due to their ease of application, vibrant colors, and protective properties. However, despite their growing popularity, there are still challenges associated with large-scale use of exterior wall paints.
One common issue is the peeling or flaking of paint on building exteriors, which not only affects aesthetics but also raises concerns about quality and durability. After repairs, it’s often difficult to match the original paint color and texture, leading to visible patches that detract from the building’s appearance. This problem is particularly concerning in real estate developments where multiple phases are built consecutively. If the first phase of a project already shows signs of wear while the second phase is still under construction, it can significantly impact future sales and property value.
The root causes of paint peeling are multifaceted. One major factor is the quality of the paint itself. Some manufacturers cut corners by using inferior materials or reducing costs, which compromises the performance of the product. Additionally, some companies lack the technical expertise and advanced equipment needed to adjust formulas according to specific project conditions, leading to poor adhesion and premature failure.
China's architectural coatings have been in use for about 2-3 years, and as a result, they are now experiencing aging issues such as fading, chalking, and peeling. These problems have led to the emergence of low-quality finishes that no longer meet the expectations of modern consumers. People today expect long-lasting, durable, and aesthetically pleasing exterior finishes. For high-rise buildings, the expected lifespan of exterior materials is typically over 10 years, sometimes up to 15-20 years. Given the harsh environmental conditions in China, including pollution and extreme weather, the demands on exterior coatings are even higher.
Despite these challenges, many paint manufacturers are working to improve product quality and develop more advanced solutions, such as weather-resistant, stain-resistant, and crack-resistant coatings. However, ongoing efforts are needed to enhance production processes, upgrade equipment, and refine application techniques. The industry must continue to innovate and ensure that both material quality and construction practices meet the highest standards.
Construction management plays a crucial role in ensuring the success of exterior paint projects. Even the best paints can fail if applied incorrectly. The painting process involves several key steps, including design, base preparation, and actual coating application. Any mistake at any stage can lead to issues like blistering, cracking, or peeling. Proper design is essential—facades should be divided into smaller sections to prevent stress-related cracks. Choosing the right type of paint based on environmental conditions and substrate characteristics is also critical.
The base layer, or plastering, is equally important. Poorly prepared surfaces can lead to adhesion problems and eventual paint failure. It’s vital to clean walls thoroughly, fill in gaps, and properly prepare the surface before applying paint. During the painting process, attention must be paid to temperature, humidity, and weather conditions. Painting in direct sunlight or during cold, windy weather can negatively affect the drying and curing process, leading to poor results.
Skilled labor and proper training are also essential. Construction workers need to understand the properties of different coatings and follow manufacturer guidelines closely. Relying solely on past experience without considering new product requirements can lead to mistakes and costly rework.
Finally, external factors such as sunlight, wind, rain, and pollution play a significant role in the degradation of exterior coatings. These natural elements contribute to the aging process, making it harder for coatings to maintain their integrity over time.
In conclusion, while paint peeling remains a complex issue, it is not insurmountable. With better materials, improved construction practices, and increased awareness of environmental factors, the industry can work together to solve this problem. As technology advances and standards improve, we can expect a future where exterior paint performs reliably and enhances the beauty and value of buildings.
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