Who will pay for exterior paint?

With the frequent fall of high-rise building exterior wall bricks, many provinces and cities in China have begun to restrict or disable exterior wall tiles. Most of these areas that disable exterior wall tiles have used exterior wall coatings to decorate buildings. Exterior wall paints are gradually favored by developers due to their features such as simple construction, rich colors, and good decoration and protection of buildings. However, due to the fact that the implementation of exterior wall coatings in our country is not long, there are still drawbacks in the large-scale use of exterior wall coatings.

We saw such scenes on the external walls of the building, together with a wall drum bulge, and even some large walls were very ugly. Even after repair, it is difficult to be consistent with the original paint layer, leaving a patch on the outside wall.

The exterior of the building is like a person's makeup. Once "makeup" will seriously affect the appearance of the building. And now most of the real estate developers are contiguous developments, and each project has a great influence on each other. If the second phase of housing has not yet been completed, the external walls of the first phase of the house have changed beyond recognition. This will undoubtedly be a fatal blow to the sales of the subsequent projects.

Source: Coating companies are the main reason

Once the exterior paint falls off, most people will think that the quality of the paint itself is not enough. Although it is not absolute, it is one of the fundamental causes of paint shedding.

The reasons for the poor quality of paint products mainly include the following: First, some paint manufacturers are pursuing high profits for cutting corners or cutting down materials, or using inferior raw materials to reduce product costs; second, some production enterprises with poor equipment and weak technical strength , can not adjust the product formula according to the substrate conditions of the coating project, resulting in poor coating quality.

As China’s architectural exterior paints have been used for 2-3 years in building exterior wall decoration, they have experienced aging phenomena such as loss of light, discoloration, peeling, peeling, and chalking, which have seriously affected the decorative effect of the external walls. The coating has long been formed. A variety of low-grade decorations are not suitable for the consumption concept of high-end decorative exterior walls. From the perspective of consumer psychology, China's external wall decoration pays attention to one-time investment. Generally speaking, the service life of exterior wall decorative materials is required to be more than 10 years. The design life of super high-rise buildings requires 15-20 years, plus the serious environmental pollution in China, and the external wall decoration materials. The durability and anti-fouling requirements are even higher. As a result, no brand of exterior paint that can play a leading role in the Chinese market has emerged to date.

In recent years, exterior paint manufacturers have continuously worked hard to positively regulate market behavior, strengthen industry self-discipline, and vigorously developed high-performance exterior wall coatings such as weather resistance, stain resistance, and crack resistance. The quality of exterior paint has been greatly improved. . However, due to uncontrollable market behavior, paint companies still need to work hard to improve the level of production equipment, improve the production process, improve product quality, and constantly adjust the product structure. Based on the application of general-purpose architectural coating technology products, it constantly adjusts the product structure, develops new technologies and new products to enter the construction market, completes product serialization and supporting technologies, improves application technology and service levels, and resolves external wall coatings from the source. problem.

Controllable: construction management is the key

Paint on the wall must go through the painting process. Due to the uneven construction level of construction workers, site management, and other reasons, even if the selection of high-quality paint, it is difficult to guarantee the decorative effect of the later period. Therefore, the construction process is the key to affecting the decorative effect of exterior wall coatings.

The exterior wall paint construction includes three steps of design, grass-roots level, and exterior wall paint construction. Any loopholes or unsmooth connection at any step will directly lead to bulging and shedding of paint on the rear wall.

First of all, the construction process must be rigorous. Design is the basis of construction. As the saying goes, “The foundation is not solid and the earth is shaking”, so the design is particularly important. The external wall of a building is in direct contact with the external environment and fluctuations in temperature fluctuate. If the design separates a large area of ​​the facade, the external wall is susceptible to cracks when it is subjected to thermal expansion and contraction due to temperature. Therefore, the separation area of ​​the facade should be as small as possible. 3~5 m2 is good. In addition, various paints are available in different varieties and their performance and use requirements are different. Only designers understand the properties of various coatings, and fully consider factors such as the conditions of the substrate to which the paint adheres, the locations where the paint is used, and the natural environment in which the paint will be located in the future. In order to choose the right coating.

Plastering of the exterior wall is the base layer for coating adhesion, and plastering cracking is the main reason for coating cracks. Generally do not clear the wall before plastering, wall surface is too dry, some of the walls smooth, often lead to poor adhesion of plaster and grass, easy to empty or fall off. Therefore, before the plastering, the wall surface should be cleaned, the holes should be blocked, and the concrete that protrudes from the outburst film wall should be flattened. The concrete with honeycomb and honeycomb defects should be handled in advance. Secondly, attention should be paid to the timely maintenance of plastering during the construction process. Each plastering layer should be protected from exposure, quick drying, water rushing, impact and vibration before it is condensed to ensure that its ash layer has sufficient strength. As long as the mortar ratio is reasonable and construction is strict, cracking can be avoided.

The painting of the exterior wall should follow the principles of first and last, from the order of roofs, gutters, column tops, beams, and rafters to walls, doors, windows, and floors. Each of these parts must also be brushed from top to bottom. To achieve good painting results, skilled operation levels are necessary.

Second, the construction environment conditions. The construction, drying, and conjunctiva of architectural coatings must be conducted under certain temperature and humidity. Coatings usually have a minimum temperature of more than 5C, an optimum temperature of 10-35°C, and a construction humidity of 60-70%. Some exterior paint experts pointed out that the choice of construction season has an important impact on the quality of exterior wall paint construction. For example, in the summer, avoid construction under direct sunlight. Under direct sunlight, the surface temperature will be too high, and the water will evaporate too quickly and affect the coating film formation. The characteristics of winter climate and the cost of coatings determine that exterior wall decoration finishes are not easy to construct in the winter. Low winter temperatures, difficulty in operation, and difficulty in drying paints, and thus affecting the paint adhesion will cause problems such as layering and peeling of the paint. occur. Therefore, it should be ensured that the construction temperature is higher than the minimum temperature for the construction of the paint, and it is advisable to brush the temperature strictly according to the product description. The wind is not suitable for construction, it will accelerate the evaporation process of water, and the coating is easy to contaminate the dust.

In addition, the technology construction is people-oriented. In addition to the construction process and strict quality control, the construction personnel must have a certain amount of knowledge about building materials and have a good grasp of the properties and application scope of the coating. As coating companies continue to develop new products, the performance and construction requirements of different products will be different. Construction workers must also strengthen the learning of new products and perform construction according to different coating application requirements. They can not blindly rely on previous construction experience subjectively. To carry out the construction. If the construction is paralyzed and misuse of paint is caused, it will not only increase the construction cost, but also cause troubles of rework and delay the construction period. In short, as long as the architectural design is reasonable and the organization is properly constructed, the “safety first, quality-oriented” construction plan will be resolutely implemented, and the quality relationship between the raw material entering the site and the construction of the organization will surely control the quality of the external wall coating of the building. Let the exterior paint of buildings play its due role in the field of architectural exterior decoration.

External factors: erosion of the natural environment

Buildings rely on external walls, roofs, doors and windows to block the impact and erosion of the natural environment on the interior of the building. The outer walls of the building are subjected to the most severe natural erosion, and the outer wall finishes of buildings are in direct contact with nature. The natural factors determining the aging and loss of exterior coating materials are radiation, temperature, and humidity. These three factors have complicated synergistic effects on the aging of exterior wall coatings.

The first is the sun's irradiation, which will directly cause discoloration and peeling of the exterior paint. Followed by the erosion of wind and rain. This is more serious for high-rise buildings. There is dust and dust in the wind. There may be hail in the rain and snow. The accumulated erosion will cause the outer wall paint to fall off. So why does the same architectural paint fall off under the influence of different external environments? meeting. All kinds of natural influencing factors directly cause the paint to fall off, which is also an important reason for the frequent renovation of exterior paints.

There are many reasons for the detachment of the external walls of a building, and they are complex. It cannot be blamed simply on who is responsible for it. From the perspective of enterprises, how do coating manufacturers make trade-offs between cost and quality, innovative products innovate products for development, how do developers choose coating companies, and how companies effectively manage construction teams? Is the industry committed to actively addressing external walls? The fundamental problem of coating shedding is very important. In terms of construction management, how to grasp the construction season, how to resolve the conflict with the cost control construction schedule, design the construction plan in combination with the characteristics of the building itself, strictly control the construction process, and maintenance in the future, etc. How to minimize the erosion of the natural environment and so on in material selection.

Such tangled, whether the problem of peeling cannot be solved? Peeling is one of the common defects of paints, and it is also a stumbling block that affects the external wall paint market to seize the decoration of external walls of buildings. Paint companies need to work hard to break through the difficulties. For Party A, There are many advantages of exterior wall paint finishes, and companies are also eager to improve or completely solve this problem, and the problems of exfoliation can be better avoided under the premise of qualified materials and technology clearance, so whether it is the promotion of its own or external causes, There are reasons why we believe that the problem of building paint peeling will be solved in the future.