What is the allowable deviation of the national standard for the thickness of 4mm waterproof coiled material?

The allowable deviation of the national standard for the thickness of 4mm waterproof coiled material is 0.3, that is, between 3.7 mm and 4.3 mm. ..

Waterproof membrane is mainly used in building walls, roofs, tunnels, highways, landfills and other places, which can resist the leakage of rainwater and groundwater. As a leak-proof connection between the engineering foundation and the building, it is the first barrier of the whole project and plays a vital role in the whole project.

The waterproofing membrane has the following four properties: 1. Water resistance, 2. Temperature stability, 3. Mechanical strength, ductility and fracture resistance, and 4. Flexibility.

If you want to choose a professional waterproof brand, you can learn about Keshun waterproof brand.

The company has brands and business segments such as engineering waterproof brand "C K S Keshun", civil building materials brand "Keshun Family Waterproofing" and building repair brand "Keshun Repair", and its products cover waterproof materials; Mortar material; Sealing material; There are four categories of drainage materials 100 varieties. Keshun Waterproof Technology Co., Ltd. was established in 1996. After more than 20 years of steady operation and efficient development, it has grown into a comprehensive building materials company at home and abroad focusing on providing comprehensive waterproof solutions, integrating engineering building materials, civil building materials and building repair business. And the production strength is strong, with 9 production and R&D bases in Gaoming, Guangdong, Kunshan, Jiangsu, Nantong, Liaoning, Dezhou, Shandong, Changshou, Weinan, Chongqing, Jingmen, Hubei and Sanming, Fujian. The production capacity reaches 350 million ㎡, the polymer material is 36 million ㎡, and the waterproof coating is 680,000 tons (including uncured material 1 1 10,000 tons). At present, Dezhou, Jingmen and Gaoming plan to build the second and third phase factories respectively to expand the production capacity of each base.