Traditional building waterproof materials refer to traditional petroleum asphalt paper felt, epoxy coal tar pitch coating and other waterproof materials. This kind of waterproof material has the disadvantages of temperature sensitivity, low tensile strength and elongation, and poor aging resistance. Especially for exposed waterproof engineering, its high and low temperature characteristics are not good, and it is easy to cause aging, dry cracking, deformation, fracture and decay. Although the waterproof method of "three felt and four oil" has been stipulated for this kind of waterproof material to appropriately extend its durability period, it is necessary to use "three felt and four oil" waterproof methods However, the thickness of waterproof layer is increased, and the labor intensity of workers is also increased. Especially for the roof with complex shape and more protruding roof parts, the construction is difficult, the quality is difficult to guarantee, and the maintenance difficulty is also increased. At present, the proportion of traditional asphalt paper-based sleeve felt used as waterproof layer in small and medium-sized cities is still very large, which accounts for about 85% of China's waterproof materials, including glass cloth based asphalt felt and glass fiber based asphalt felt.

Compared with the traditional waterproof materials such as stone sleeve asphalt felt and its auxiliary materials, the new building waterproof material generally has two meanings: one is the material "new", the other is the "new" construction method. It is an effective way to improve the performance index and waterproof function of traditional building waterproof materials, so as to make the traditional waterproof materials become "new" waterproof materials. For example, catalytic oxidation treatment of asphalt, the cold brittleness performance of asphalt at low temperature has been fundamentally changed, making it become high-quality oxidized asphalt, and the performance of paper-based asphalt felt has been greatly improved Glass cloth tire and glass fiber tire were used to gradually replace paper tire, so as to further overcome the shortcomings of paper tire such as low strength, poor elongation and low oil absorption string, and improve the quality of asphalt felt.

However, it is not enough to improve the performance index and waterproof function of traditional building waterproof materials to make them become "new" waterproof materials. In order to improve the current situation of waterproof engineering in China as soon as possible, the Ministry of construction has taken a series of comprehensive treatment measures and formulated policies and regulations for the development, promotion and application of new building waterproof materials and new waterproof construction technologies. In the "building technology policy" issued in 1986, it was formulated to "improve the quality of asphalt waterproof materials and waterproof coatings, develop medium and high-grade waterproof coiled materials, coatings and waterproof caulking sealing materials. During the" Seventh Five Year Plan "period, we should focus on the development of new varieties of waterproof, fireproof and thermal insulation materials, comprehensively carry out the research and development of application technology, and establish and formulate product series, standards and application regulations In the last 10 years, the construction engineering waterproof policy has reached the international level of 70's and 80's. it points out the direction and development goals for the development of new building waterproof materials in China, and these goals have been basically achieved.

After more than 10 years of joint efforts, a large number of new waterproof materials with various types and complete categories have been successfully developed and put into use successively, and gratifying achievements have been achieved. The new building waterproof materials mainly include synthetic polymer waterproofing membrane, polymer modified asphalt waterproofing membrane, waterproof coating, waterproof sealing material, plugging material, rigid waterproof material, etc. At present, the domestic waterproof materials can basically meet the requirements of the state key projects, industrial and agricultural buildings and other construction projects for high, medium and low grades of waterproof materials.