Regularity characteristics of the detachment of external wall insulation materials
1. From the time, it shows the phenomenon of “new and old”. That is to say, the probability of the outer wall insulation material falling off after the completion of construction in 2015 is far greater than that before 2015. Take the three projects with quality problems handled by the Shenyang Construction Committee as an example, the longest three years and the shortest one. And 10 years ago or even earlier, Shenyang City has a large number of XPS insulation systems, and most of them have been safe and sound.
There are two reasons for this phenomenon: First, the early external thermal insulation industry practitioners have not learned to make fraud; Second, the new thermal insulation system in the late stage is lack of scientific research support.
2. According to the classification of the system, the probability of falling off of the new material is much higher than that of the traditional EPS thin plastering system and the high-grade rock wool plastering system. Such as phenolic systems, extruded board systems and foamed cement systems. Low-grade rock wool shedding incidents have also occurred from time to time.
3. The proportion of building wall energy insulation materials with external building insulation materials is much higher than that of new buildings.