The quality supervision department has taken action. Public walls require water-resistant putty.

According to the requirements of Weihai Quality Supervision Station in Shandong Province, starting from October 1, 2016, the design unit shall clearly use water-resistant putty in the construction drawings for the above-ground public parts such as stairwells and corridors of new residential construction projects that need to be scraped with putty, as well as the walls of stairwells and elevators of new public construction projects. For new public buildings, underground garages, basements and other public parts that need to be putty and are susceptible to damp, the design unit shall clearly use water-resistant putty or exterior wall putty in the construction drawings. (From Weihai Evening News)
The purpose is very clear: in order to prevent the wall of the public part of the building from falling off and destroying, and to ensure the durability and quality of the wall.
The Quality Supervision Bureau requires the implementation of this year's National Day "wall use water-resistant putty" policy, for you to analyze the reasons.
1. and ordinary putty ratio, water resistant putty mainly has the following characteristics
1. Water resistance, moisture resistance and mildew resistance
Ordinary putty afraid of water, dissolved in water, poor water resistance. If the eastern and southeast coastal areas have high environmental humidity and wide rain, especially in areas with many typhoons, ordinary putty is used. After the putty layer absorbs external moisture and moisture, it is easy to loosen and powder, providing conditions for mold to grow wildly, and the wall is extremely easy to mold and even peel. The water resistant putty hydrophobic, moisture, moisture blocking in the outside, solid putty layer, water resistance, moisture resistance, mildew, to protect the wall coating quality and service life.
After the last typhoon "Nibert", a resident of Bandong, Minqing, had his century-old house destroyed and soaked by the flood. When the flood rushed through, the first floor was basically soaked in water. The corner of the small building near the outer street had collapsed, while the central lobby was slightly damaged. The walls made in different periods had different endings-some rooms in the early stage used ordinary putty, which was severely pulverized and fell off, while some rooms in the later stage of painting used environmental protection putty, which was firm, smooth and intact, without mildew spots, just use a cloth to scrub away the traces of the flood to the wall. The resident repeatedly praised the water-resistant putty of the master's water-resistant performance is really good.
2, good durability, secondary decoration without eradication
Ordinary putty has poor water resistance, so it must be removed and cleaned together with the original paint when decorating later, and then putty shall be scraped again. Not only increase the cost of decoration (material costs, labor costs), but also cause waste of resources, difficult to recycle, but also pollute the environment. Water-resistant putty is once and for all. After several years, when decorating for two, three or more times, there is no need to shovel the putty layer, and the next process can be carried out after polishing the surface and partial repair, thus saving time and effort and protecting the wall.
3. Save the amount of paint
Traditional putty has strong water absorption, when the first time latex paint brush, the film is not fully leveling, the water in the paint is the bottom putty dry, so in the traditional putty surface brush latex paint because of fast water absorption, poor leveling. As a result, the coating film after brushing the finished product is not smooth and delicate enough, and latex paint is also consumed. The water resistant putty unique whiteness and density, so that its unit area coating adhesion, cover rate than the use of ordinary putty wall to save 25 to 30% of the amount of paint.
4. High bonding strength
JG/T298-2010 "Putty for Building Indoor Use" standard clearly stipulates the strength of putty. The bond strength of ordinary putty in the standard state is greater than 0.25MPa, and there is no requirement for the strength after soaking, while water-resistant putty requires the bond strength in the standard state to reach 0.50MPa, and the bond strength after soaking is greater than 0.30MPa. Through the standard can be seen, the strength of water resistant putty is higher than that of ordinary wall putty, so the use of water resistant putty is not easy to produce empty drum, fall off.
5. Low comprehensive cost
The use of water resistant putty, construction without any ingredients, just add water, there is no need to spend money to buy white latex, glue and other ingredients. The wall decoration effect and the service life of the water resistant putty are far less than that of the ordinary putty. And from the amount of paint and the cost of putty and construction costs of the second decoration, the cost of using water-resistant putty is lower than that of ordinary putty.
Comparison of environmental protection between 2. water resistant putty and traditional putty
Traditional putty not only poor water resistance (water immediately dissolved), and to reconcile the putty with the glue containing free "formaldehyde". "Formaldehyde" is a recognized carcinogenic chemical, volatile cycle for several years. Family decoration wall area accounts for about 70% of the whole house space. If the wall surface is to be filled with 2-3 times of traditional putty, a large amount of glue needs to be used. A household uses as little as a dozen barrels and as many as dozens of barrels. After the completion of the construction, the living air will be filled with a certain amount of free "formaldehyde", long-term life among them, inevitably bring harm to health.
Interior wall waterproof putty selection of world-class core raw materials-imported re-dispersible latex powder, the use of international advanced German environmental non-toxic formula, in line with international environmental standards, does not contain any free formaldehyde, benzene, harmful heavy metals and harmful volatile organic compounds. In addition, water can be added to the construction, saving labor and time. The wall surface coated with water-resistant putty is environmentally friendly and healthy, thus ensuring 70% of the healthy space of home environmental protection.
For example, Shandong, Jiangsu, Zhejiang, Shanghai, Guangdong and other eastern and southeast coastal areas, especially in typhoon prone areas, have abundant rain and high comprehensive humidity throughout the year. In the wet season, the walls are prone to mold. Moldy walls not only affect the appearance, cracking, falling off and other stubborn diseases are also very troublesome to deal with, but also bring a lot of inconvenience to life and living environment. Public building walls have begun to implement the use of water resistant putty, but also illustrates the importance of water resistant putty to protect the quality of wall coating.