Recently, a large-scale accident occurred in a community in Huimin District, Hohhot City, where the insulation layer of the exterior wall fell off in a large area, and the community has only been handed over for less than half a year. This incident sparked complaints from the owners of the community, and demanded that the façade be re-eradicated and redone, and a third-party inspection agency was asked to test the quality of the house.
In fact, in recent years, accidents of external wall insulation falling off are not uncommon, especially in windy weather, the risk of falling off is even greater. The outbreak of this large-scale nationwide problem must have been due to problems in the construction process. First of all, from the perspective of construction acceptance, the hanging basket method is used in the external wall insulation construction, and in this case, the quality control of the construction process is more difficult, the operators work at high altitude, and the quality inspection personnel observe on the ground. Secondly, from the perspective of construction technology, the external wall insulation adopts the method of sticking anchor fixation, that is, bonding + anchoring. To put it simply, it is to first use mortar to bond the insulation board to the base surface of the exterior wall, then fix the anchor bolt (insulation nail) through the insulation board on the wall, and finally wipe the surface. Falling off means that the anchor structure has failed, and it must be that some links in the construction process are not in place. According to our test cases, the main reasons for falling off are: unqualified fixed anchor bolts, such as too large spacing, too shallow depth, bending deformation, etc.;The mortar construction is unqualified, such as low bond strength, small bond area, and poor processThe quality of the insulation board is unqualified, such as aging deformation, water absorption collapse, etc. The vast majority of these reasons boil down to "cutting corners".
Faced with the current situation of getting worse and worse insulation quality of exterior walls, we can't help but wonder what is the root cause of this industry. A veteran who has been engaged in the insulation industry for more than 20 years gave the answer: "Since 2001, when I started to do exterior wall insulation, the construction of EPS polystyrene board exterior wall was 180 yuan, and after 20 years, after many labor costs and raw materials, it will be reduced to 80 yuan in 2021"This shows that there is vicious competition in the industry, resulting in the loss of profit margins, and can only reduce costs in material procurement and construction technology, sacrificing quality to make up for benefits. What is the specific practice?Recently, a self-exposure complaint letter from an exterior wall insulation worker can let us know one or two: the project is low, the competition is bad, can such a project ensure quality?This has undoubtedly brought a lot of trouble to the industry.
Exterior wall insulation technology has been developed in China for more than 20 years, rapid progress, new technologies and new materials continue to be put into the market, people seem to be keen on the pursuit of new tricks, but ignore the core control of project quality. Now facing more and more quality hidden problems, how to reform the quality standards and construction methods, to achieve the goal of external wall insulation and building structure with the same life, is a difficult task.
This incident had a certain impact on society. First of all, the quality of exterior wall insulation has attracted widespread attention, which has triggered social concerns about the quality of the construction industry. Secondly, it also reminds relevant departments and industry associations of the importance of supervision and standard setting, and to strengthen the monitoring of key links in the construction process to ensure quality and safety. In addition, this has also triggered the enthusiasm of the owners of the community to protect their rights, and they require a comprehensive inspection of the quality of the first house, and rectify the problematic parts.
As for the latest developments, there are no detailed reports yet. But it is foreseeable that this incident will have a profound impact on the exterior wall insulation industry. All parties will pay more attention to the quality control of the construction process, and the industry will also face higher quality requirements and standards.
The occurrence of the accident of the external wall insulation layer falling off in a community in Huimin District, Hohhot City has aroused major social concern. The incident has raised concerns about quality issues in the construction industry and prompted relevant departments and industry associations to strengthen the supervision and standard-setting of the construction process. At the same time, the owners of the community also actively defend their rights and demand comprehensive testing of the quality of the houses. For the façade insulation industry, this event will have far-reaching implications, and the industry needs to re-examine quality control and improve the quality of construction processes and materials to ensure the safety and reliability of buildings.
Ask readers to share your thoughts on this event, whether you have had similar experiences or know of other similar eventsHow to look at the quality problems of the exterior wall insulation industry?How do you think the industry should be reformed and improved?