Market mixed with poor quality waterproof material

According to a recent investigation and interview conducted by the reporter, there are multiple quality problems in the waterproofing industry, such as mixed material markets, and non-standard construction projects, which pose a huge hidden danger to the leakage of building materials.

On October 18th, the reporter visited Beijing Sihuiqiao Building Materials Wholesale Market Paint Hardware Zone under the name of 'Renovation of Bathroom Decoration to Make Waterproof'. There are about 30 to 40 merchants selling paint and paint. Similar to what was learned in the Jiuxianqiao building materials decoration market, there are many kinds of waterproof materials. Take waterproof coatings as an example. From the viewpoint of names, there are waterproof coatings, waterproof pastes, and waterproof mortars. The same brand, the same specifications of waterproof coatings, different business prices can be as good as nearly 100 yuan.

A merchant recommended three types of waterproof coatings to reporters: one is a polyurethane waterproof coating, and the price of 20kg is 300 yuan; the one is acrylic waterproof coating, and the price of 20kg is 230 yuan; and the other is JS waterproof coating, and the price of 20kg is 180. yuan. From the sample of the three coatings, their elasticity and flexibility feel different. One of the businesses told reporters that if large-scale use of waterproof coatings, it is best not to choose a brand we are familiar with, because this paint is selling well, the counterfeit goods on the market are also more, and it is easy to run into accidents. In addition, 'SBS' waterproof membranes sold on the market also have a lot of fakes.

According to the results of the AQSIQ's random inspection of the quality of construction waterproofing membrane products in recent years, the qualified rate of physical quality sampling of products was 94.6% in 2008, 85.7% in 2009 and 85.3% in 2010. Mainly manifested as soluble content, impermeability, tensile strength, elongation, etc. do not meet the requirements of the standard, and the product quality of waterproofing membranes is not optimistic.

A marketing director of a professional waterproof company told reporters that waterproof coatings currently do not have production license requirements, although environmental protection, standards and other requirements are more stringent, but compared with waterproof membranes, waterproof coating companies are smaller, more scattered It is even more uncontrolled and the market conditions are more chaotic.

The "Technical Specification for Waterproofing of Building Interiors" (CECS 196:2006), which began in April 2006, specifies the waterproofing of bathrooms, kitchens, and swimming pools. Waterproof materials required for use in architectural interior projects shall have product qualification certificates and factory inspection reports. The varieties, specifications, and performance of materials shall comply with the current national product standards and design requirements; the waterproof material package shall have obvious signs, and the content of the marks shall include the product name. , plant name address, lot number, shelf life and implementation standards.

In addition to the waterproof quality of the waterproof material, the waterproof construction personnel are not professional, and the construction quality is not up to the standard. This is also an important cause of water leakage.

Around the Sihuiqiao building materials wholesale market, the reporter discovered that there are many workers who are branded with 'professional waterproof'. They usually take the initiative to negotiate with passers-by to ask if they want to do waterproof works. When the reporter came up to one of them to chat, when asked if he could do toilet waterproofing, the master from Henan promised, "I'm sure there is no problem. 'The price was about 300 yuan. When the reporter asked what brand of paint and coil materials to use, he vowed to the reporter: 'Rest assured, you do not control what material, as long as you can ensure that you do not leak water, after the leak free warranty. 'The reporter proposed to use a waterproof coating that consumers have recognized as being of better quality. Master Zhang Lima changed his mouth and said: 'If we come to buy materials, the price is not 300 yuan, at least 800 yuan, because the kind of paint light to buy Three or four hundred yuan, plus the money of the coil. '

Master Zhang’s card to reporters shows that his company is a waterproof construction team approved by the Beijing Municipal Construction Committee. However, the reporter did not find the company’s relevant information in the Beijing Construction Committee’s official website.

Are waterproof construction personnel required to have the appropriate qualifications? What are the specifications for construction? Zhang Dingli, dean of the School of Civil Engineering and Architecture at Beijing Jiaotong University, said that waterproof construction has a series of strict norms and standards. Taking large-scale construction projects as an example, before the waterproof construction of the bathroom, the “waterproof construction scheme for toilets” shall be formulated by the general contractor. After the supervision and approval of the toilet and the approval of the engineering department of the project company, the waterproof construction of the toilet may be carried out. The unit or subcontractor that undertakes the waterproof construction shall have corresponding waterproof professional construction qualifications. The construction personnel shall go through professional technical training and hold certificates. Firstly, the construction of the model was conducted. After Party A and the supervisor checked and passed the inspection, the construction could be fully carried out.

One Mr. Chen, who is engaged in architectural design in Shanghai, told reporters that a major reason for the difficulty in controlling the quality of building waterproofing is subcontracting, and subcontracting can easily cause construction quality problems. In addition, some bids for waterproofing projects, in the tendering companies, many purchasers in order to save expenses, do not set a threshold, tend to adopt the 'lowest bid winning' standard. After a successful low-price bid, in order to earn more profits, materials are shoddy, and counterfeit and inferior products are manufactured and sold. It is easy to leave hidden risks for the quality of the project.

Zhang Zixin, a professor in the Department of Underground Architecture and Engineering at Tongji University, said that waterproofing is a systematic project. There are various causes of water leakage. Building construction, construction, and later operation and management, and problems at any one stage, may cause leakage of water. Therefore, when doing waterproof engineering and waterproof maintenance, we must pay attention to the construction of the entire life span, the entire process of maintenance, pay attention to the integrity of the project, systemic.

The quality supervision department reminds consumers to purchase and use waterproof materials. First of all, they must pay attention to the instructions for use of the product, understand its use situation and application scope, and choose the right product for construction. Should not use rough packaging, container shape is skewed, use instructions and other characters printed fuzzy products. And try to go to the formal construction market or supermarket to buy.