Current status of building roof energy saving in my country At present, building energy saving has become a major issue that our country attaches great importance to. The central leadership has repeatedly emphasized: we must fully pay attention to the importance and urgency of saving energy resources, earnestly achieve development from resource saving, and vigorously develop energy-saving houses. , promote and popularize energy-saving technologies, and put energy conservation at the top of the energy strategy.
According to the analysis of relevant experts, by 2020, if all urban buildings meet the energy-saving standards, 335 million tons of standard coal can be saved every year; the peak load of air-conditioning can be reduced by 80 million kW, which is equivalent to the newly added power capacity of my country in five years from 1988 to 2002 The sum total, or the power generation capacity of 4.5 Three Gorges Dams, or the equivalent of saving 1 trillion yuan in power construction investment for the country every year. For the building materials industry, building energy conservation is an urgent task.
At present, the existing building area in my country’s urban and rural areas is about 42 billion m2. For the roof, the heat consumption of building heating is 2.5 to 5.5 times that of developed countries with similar climate conditions. The heat loss of the roof accounts for about 9% of the total heat loss of the building, and the energy consumption is too high. .
With the continuous improvement of people’s living standards, the requirements for building thermal comfort are getting higher and higher. However, most of the building roofs in my country cannot achieve energy-saving effects. To achieve indoor comfort, heating and air conditioning must be increased. The utilization rate, that is to pay more energy costs. Our country is facing relatively insufficient resources and poor recycling of resources. Therefore, it is a very urgent task to improve the thermal insulation and waterproof performance of roofs and effectively meet energy-saving standards.
Promotion and application of thermal insulation and waterproof roofing system Waterproof and thermal insulation is a complete system on building roofs. Since waterproof materials and thermal insulation materials are two systems, waterproof materials basically have no thermal insulation function, and thermal insulation materials cannot be waterproof. In practical application, the failure of insulation due to water leakage of waterproof quality, and the phenomenon of water in the insulation affecting or destroying the waterproof layer frequently occurs. The failed projects have caused strong dissatisfaction in the society and brought economic benefits that cannot be ignored. Since the roofing materials cannot be recycled, the renovation of the roofing project will also generate a large amount of construction waste, which will increase the overall cost. The popularization and application of waterproof and thermal insulation integrated roofing system is an effective way to solve this problem.
The application of rigid polyurethane waterproof and thermal insulation integrated materials started relatively late in my country. In 1997, German technology and equipment were introduced, and a Sino-German joint venture Sanli Waterproof and Thermal Insulation Engineering Co., Ltd. was established, which is dedicated to the promotion and application of rigid polyurethane waterproof and thermal insulation integrated roofs in China system. Several research and construction units in different regions of the country are also constantly exploring and practicing. So far, this material has been applied in China for more than 8 years, and millions of m2 roofing projects have been completed. The waterproof, thermal insulation and energy-saving effects are remarkable. Aspects of attention. The research and application show that the rigid foam polyurethane waterproof and thermal insulation integrated roof system is a successful model of the roof waterproof and thermal insulation system. The common problem of mutual influence of waterproofing also makes the roof have long-term energy-saving effect.
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