Can exterior wall paint replace exterior wall tiles?
On August 5, CCTV's Weibo revealed that the thermal insulation material on the outer wall of a new house on Binhe West Road, Taiyuan, Shanxi Province was plastic foam. This thermal insulation material was easy to ignite and caused many hidden dangers, which led to the joint refusal of hundreds of owners. On August 6, the "Guangyuan Evening News" reported that the external wall tiles of high-rise buildings fell off and lasted for two months without anyone paying attention. After a panic, the two incidents were exposed almost simultaneously, which aroused public attention. It is understood that building exterior wall bricks have gradually emerged in the 1980s and 1990s, and have now become the first choice for exterior wall decoration of many high-rise buildings. However, exterior wall bricks and exterior wall insulation materials have often become suspended in some cases. Hidden dangers on the heads of residents in the community.
The hidden dangers of external wall insulation materials and external wall bricks have always existed
According to Shanxi’s “foam wall” exposed by CCTV’s Weibo, major domestic media have paid attention to it. According to related reports, the external wall insulation material of the new house of the building is plastic foam, which is easily ignited, causing hundreds of owners to jointly refuse to accept it. room. According to regulations, the combustion performance of external insulation materials for civil buildings should not be lower than B2, and insulation materials above B2 are not easy to ignite. Then, shortly after the incident was exposed, on August 6, the "Guangyuan Evening News" spoke out. According to reports, bricks on the east side of a square building had fallen off, threatening the safety of pedestrians passing through the passage downstairs every day. Residents in the vicinity were frightened when they passed by here every day. This incident occurred for two months without anyone paying attention.
According to statistics from relevant media, news about external wall insulation facing tiles falling off occurs every year. According to incomplete statistics, there were more than 50 incidents of external wall tiles falling off that were exposed last year alone. In addition, fire accidents have occurred frequently in various places since January this year. Some people believe that this is related to the poor quality of building exterior wall materials, especially insulation materials. Although, afterwards, many insulation material manufacturers shouted injustice, but on August 5, the external wall insulation material of a new house in Binhe, Taiyuan, Shanxi was ignited at the scene. The clear pictures taken by relevant media reporters once again caused panic among the people.
External wall insulation materials have poor fire safety, so high-rise buildings should cancel the use of external wall bricks?
Some industry media have collected relevant knowledge of external wall insulation materials earlier. According to the media, the most commonly used organic thermal insulation materials in my country’s buildings are polystyrene and polyurethane rigid foam materials. Their biggest advantages are light weight, good heat preservation and heat insulation performance, but the biggest defect is fire prevention. The safety is poor. Therefore, the reason for the fire safety of the external thermal insulation system is that the organic thermal insulation material in the system has the risk of causing fire and accelerating the spread of fire.
As for the phenomenon of falling bricks on external walls of high-rise buildings, professionals from Hebei Academy of Building Research, Hebei Engineering Construction Quality Supervision, Inspection and Management Station, Hebei Architectural Design and Research Institute and other units introduced the possible causes of external wall bricks falling off There are many, but most of them are caused by various uncertain factors such as building materials, construction techniques and bad weather. It is understood that for energy conservation considerations, construction units use external wall insulation during construction. The external insulation materials are mainly foam materials, and then cement mixed adhesives are used on the foam materials to paste the external wall tiles. Therefore, ceramic tiles and The adhesion of the wall is not permanent, and it will age over time. Generally, the "safe life" of external wall tiles is about ten years.
In addition, the building materials used to paste the exterior wall tiles and the human factors of the construction personnel will affect the life of the exterior wall tiles. Moreover, there are many factors that cause the exterior wall tiles to fall off. For example, exterior wall tiles are generally thicker, have a higher weight, and are easier to fall off. In addition, some periods of severe temperature and climate change, such as frequent rains or sudden drops in temperature, or windy weather , Accidents of exterior wall tiles falling off are more common.
In this regard, since 1999, the Xiamen Municipal Government issued the “Administrative Regulations on the Decoration of Exterior Walls of Xiamen’s Buildings, which require that “the height of the exterior wall of the building from 24 to 50 meters above the ground is restricted to the use of veneer tiles, and the height of the stone veneer wall above the ground shall not be greater than 10 meters, and restrict the use of cement mortar on-site pasting stone veneer on the exterior walls of buildings.” So far, Jiangsu Province, Chongqing City and other provinces have also issued relevant policies to regulate the use of exterior wall tiles. In this regard, a media reporter suggested that instead of using ceramic tiles for exterior finishes, use exterior wall paint, real stone paint, and flexible facing bricks instead. He believes that the exterior walls of many foreign buildings are mostly decorated with paint.
In this regard, industry insiders said that although the accidents caused by exterior wall tiles have been exposed a lot in recent years, building exterior wall decoration materials have outstanding advantages in protecting the walls. The exterior wall tiles are durable and have great advantages. Good durability and texture, as well as easy cleaning, fire resistance, water resistance, wear resistance, corrosion resistance and low maintenance costs. Especially in areas with relatively large environmental pollution and dusty air, it undoubtedly has great advantages. Moreover, most of the current tile falling and other reasons are improper construction, not the problem of the tile itself, so the person believes that the exterior wall tiles have many advantages and cannot be killed in one shot.
It is understood that the national standard "Ceramic Tiles" (GB/T4100-2015) approved and issued by the National Standards Committee this year will further improve the material saving and energy consumption level of my country's building and sanitary ceramics industry and guide the ceramic industry to Innovation, creativity, branding and green development. In the future, I believe that with the efforts of ceramic companies, exterior wall tiles and their paving technology will continue to reform and progress, and such incidents will no longer occur.