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New opportunities in the industry? The 10 billion-level building insulation and structural integration market has arrived!

Release date:2018-10-08 Author:绿建节能方向标 Click:

More than a decade ago, in response to the national energy conservation call and the protection of residential housing experience, governments across the country have successively requested the use of external wall insulation systems for civil buildings. However, in recent years, large-scale detachment of external wall insulation and fires have occurred frequently, which seriously threatens the lives of residents. Then, how to protect the lives and property of residents? The old traditional insulation can not be solved, the industry is waiting for new revolutionary technology!

First, traditional insulation and its defects

At present, most of the external wall insulation methods on the market are externally attached, that is, the thermal insulation material is attached to the surface of the wall through the bonding mortar and covered with a veneer layer. This practice is greatly affected by factors such as construction quality and external environment, resulting in a life expectancy that is far below the design requirements and will fall off in a few years. Not only affects the appearance of the building, but more serious is directly threatening the lives of residents. 

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In 2017, the outer wall insulation material of Junhewan in Luoyang City fell off due to the large outer surface of the thermal insulation board. There is no protective structure. Once a local fire occurs, igniting the outer thermal insulation material will cause the outer insulation material of the whole floor to catch fire. It seriously threatens the safety of residents' lives and property.


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Zhengzhou Greenland, the original international fire in 2018

Second, the traditional road of insulation innovation

The frequent occurrence of traditional external insulation and falling off fires has caused the government to attach great importance to it. The industry continues to innovate and develop new insulation systems for the Chinese insulation market. At this time, building energy-saving and structural integration technologies came into being.

Building energy-saving and structural integration technology, that is, the wall structure relies on thermal insulation materials to form a composite thermal insulation wall, thereby achieving the energy-saving work goal of the building envelope structure. In recent years, the world trend of energy conservation and emission reduction and national politics, building energy conservation and structural integration, solar building integration, building shading integration and so on, the discussion and practice of building integration has gradually warmed up. The goals of these research and practice directly point to the "reborn" of the traditional "Qin brick Hanwa" collection and make it carry more new functions for the benefit of mankind.

Third, the development of building energy efficiency and structural integration

The research and implementation of building energy-saving and structural integration technologies are related to the safety, economy and aesthetics of buildings. They are closely related to the construction of the currently well-known wall insulation system and the energy-saving renovation of existing buildings. The mainstream real estate enterprises represented by Vanke, Evergrande and Sunac also expressed close attention, long-term observation and follow-up research on this new product, and affirmed and highly praised the integration of thermal insulation structure in their pilot projects. They have achieved very dazzling results.



As of 2018, the Henan provincial government and local governments have issued documents to support the safety of citizens' lives and property, and mandatory use of thermal insulation and structural integration technologies.



Henan Province implements the implementation plan of building insulation and structural integration technology

The building insulation and structure integration technology (hereinafter referred to as “integrated technology”) integrates the functions of thermal insulation and enclosing structure, and has structural insulation and structural fireproof performance, which can effectively realize the same life of building insulation and wall; Chemical technology, in line with the national energy conservation and emission reduction industrial policy, is an effective way to do a good job in building energy conservation work and develop green buildings; to accelerate the application of new energy-saving insulation structure technology in the housing and urban construction areas of our province, and gradually limit the elimination of backward traditional external wall insulation Technology, the following embodiments are proposed.

First, the job requirements

Guided by the scientific concept of development, with the goal of energy conservation, emission reduction and environmental protection, with the transformation of urban and rural construction mode as the foundation, focusing on the development of green and energy-efficient buildings, we will firmly grasp the new urbanization of intensive, intelligent, green and low-carbon. In the new rural construction development opportunities, in accordance with the requirements of the "Henan Province Green Building Action Implementation Plan", efforts will be made to promote the modernization of the construction industry, promote the in-depth development of building energy conservation work, vigorously promote the integration of building insulation structure technology, and comprehensively improve the quality and safety performance of building energy conservation projects. Efforts will be made to achieve green development, circular development and low-carbon development in the housing and urban-rural construction of our province.

Second, the work target

1. At the end of the “Twelfth Five-Year Plan”, the province will adopt new buildings with integrated technology, and strive to reach more than 10% of the total urban construction projects. In 2020, strive to reach more than 40%. At the end of 2015, the proportion of public housing construction projects for housing and government investment in Zhengzhou City reached more than 30%, and the proportion of construction area of group projects in Hecun Township Project and new urbanization construction reached more than 20%.

2. Encourage cities and counties (cities) with integrated technology promotion conditions in the province. In 2014, new projects in the main urban area will vigorously promote integrated technology. Other cities and counties (cities) will launch pilot technologies for integrated technologies by the end of 2014.

3. Support all kinds of demonstration projects, government investment and key projects such as affordable housing, green building projects, renewable energy building applications, and take the lead in adopting integrated technology; other new residential buildings and public buildings projects are preferred to use integrated technology. Guide the green rural housing construction project to carry out pilot demonstration of integrated technology.

4. During the “Twelfth Five-Year Plan” period, five demonstration bases for thermal insulation structure integration with a certain scale will be built, and 10 key enterprises with large production scale, fine technical equipment and excellent product quality will be cultivated.

Third, the work focus

Key promotion technology: after thorough research and demonstration, and through engineering practice, composite reinforced concrete shear wall (CL) structural system, concrete thermal insulation curtain wall building system, laminated film sprayed concrete sandwich shear wall building structure technology, FS outer formwork cast-in-place Concrete composite insulation system, non-load-bearing self-insulation aerated concrete block structure system, cast-in-place foam concrete structure system, etc. as the key promotion and integration technology.

Key areas for promotion: First, government investment and key projects will go ahead. All kinds of government investment projects and key project construction projects will be built in the province. All projects applying integrated technology should be implemented first. The second is the first test of affordable housing projects. Newly built affordable housing in the province, where applicable integrated technology application projects, must take the lead in organizing pilot demonstrations. The third is to promote the overall implementation of cities and counties. National renewable energy building application demonstration cities and counties and green eco-city new construction projects should establish an overall promotion plan, clearly promote the goal, and promote the integration of technology applications in conjunction with the demonstration project. Fourth, commercial projects are encouraged to implement. Guide commercial real estate development projects to promote integrated technology, encourage real estate development enterprises to build integrated technology demonstration communities; support green farm housing construction and application integration technology. Encourage farmers to adopt integrated technology when building and renovating farm houses.

Henan Province implements the implementation plan of building insulation and structural integration technology

The building insulation and structure integration technology (hereinafter referred to as “integrated technology”) integrates the functions of thermal insulation and enclosing structure, and has structural insulation and structural fireproof performance, which can effectively realize the same life of building insulation and wall; Chemical technology, in line with the national energy conservation and emission reduction industrial policy, is an effective way to do a good job in building energy conservation work and develop green buildings; to accelerate the application of new energy-saving insulation structure technology in the housing and urban construction areas of our province, and gradually limit the elimination of backward traditional external wall insulation Technology, the following embodiments are proposed.

First, the job requirements

Guided by the scientific concept of development, with the goal of energy conservation, emission reduction and environmental protection, with the transformation of urban and rural construction mode as the foundation, focusing on the development of green and energy-efficient buildings, we will firmly grasp the new urbanization of intensive, intelligent, green and low-carbon. In the new rural construction development opportunities, in accordance with the requirements of the "Henan Province Green Building Action Implementation Plan", efforts will be made to promote the modernization of the construction industry, promote the in-depth development of building energy conservation work, vigorously promote the integration of building insulation structure technology, and comprehensively improve the quality and safety performance of building energy conservation projects. Efforts will be made to achieve green development, circular development and low-carbon development in the housing and urban-rural construction of our province.

Second, the work target

1. At the end of the “Twelfth Five-Year Plan”, the province will adopt new buildings with integrated technology, and strive to reach more than 10% of the total urban construction projects. In 2020, strive to reach more than 40%. At the end of 2015, the proportion of public housing construction projects for housing and government investment in Zhengzhou City reached more than 30%, and the proportion of construction area of group projects in Hecun Township Project and new urbanization construction reached more than 20%. Fourth, safeguard measures

(1) Scientifically formulate and promote programs. Through engineering practice and pilot demonstration, our province has already established the basic conditions for large-scale promotion of integrated technology. The municipal and municipal directly under the county (city) Housing and Urban-Rural Development Bureau (committee) shall strengthen organizational leadership, establish a target responsibility system, set up or rely on integrated promotion and application of specialized agencies, equip professionals, and combine scientific practice to develop and promote scientifically. Application planning plan. Through policy guidance and technical guidance, the application of building insulation and structural integration technology will be rapidly promoted.

(2) Improve the technical support system. Establish a sound technical support system, compile an integrated technology series standard, and provide technical support for the comprehensive promotion of integrated technology. The administrative departments of housing and urban and rural construction at all levels should vigorously promote the introduction and research and development of building insulation and structural integration technologies, increase investment in construction technology, improve the joint research and development capabilities of research institutes and production enterprises, and study and formulate different technical quotas and cost standards. Cultivate integrated technical service organizations. Research and development of new waste materials such as fly ash, coal gangue, industrial waste, construction waste and other waste materials as the main raw materials, support the production and technological innovation of non-sintered new wall materials, and gradually eliminate all kinds of backward technologies and transitional products. To lay a solid foundation for the comprehensive promotion of integrated technology and modernize the construction industry.

(3) Establish a technology certification system. The implementation of the identification system for integrated technology, the provincial government will formulate detailed implementation rules for the implementation of integrated technology, organize experts to demonstrate the integration of technology, meet the requirements of the issuance of certification, regularly publish the approved integrated technology catalogue, and report the application of integrated technology In the situation, the administrative departments of housing and urban and rural construction at all levels should reasonably determine the integrated leading technologies suitable for development and promotion, combining their own resource advantages, economic and technological conditions, architectural structure characteristics, and industrial development.

(4) Cultivate and establish a production base. In accordance with the principle of “reasonable layout, steady advancement, optimization mechanism, and innovative development”, we will guide and encourage production enterprises to strengthen technology integration and innovation, improve the level of process equipment, improve the quality assurance system, and cultivate large-scale production bases, based on local industrial bases. , resource endowment and market demand, rational distribution of production bases, focus on bigger and stronger a number of leading enterprises in production standardization, management modernization, equipment automation, and advanced products. Develop integrated technology products with local characteristics to ensure the quality and market supply of integrated technology products. During the “Twelfth Five-Year Plan” period, cities and counties with conditions shall establish an integrated technology production base that can meet the engineering needs of the jurisdiction.

(5) Strengthening process supervision. The competent departments of construction at all levels shall strengthen the process supervision of the production, construction and testing of integrated technical products to ensure the quality and safety of the project. First, under the premise of not reducing the building energy-saving design standards, the construction unit should give priority to the use of integrated technologies and products to reasonably control the incremental cost of building energy-saving projects. Second, the design unit should give priority to the use of integrated technology, and in accordance with relevant technical standards, combined with engineering projects, taking into account the operational operability and economic applicability of building energy-saving engineering design; the energy-saving articles in the design documents should clearly define the performance indicators of the integrated technology. The construction drawing should have a detailed structure of the node. Third, the construction drawing review agency should strengthen the review of structural measures between building insulation and structure to ensure that building insulation meets the requirements of energy conservation standards. Fourth, the construction unit should formulate special construction technical plans and strengthen construction organization and management in accordance with the building energy-saving design documents, relevant technical standards and technical points. Fifth, the supervision unit shall check whether the performance certification documents related to the constituent materials of the integrated technical system and the types, models, certificates, production dates and type inspection reports of the relevant constituent materials meet the requirements. Sixth, the project quality supervision agency should take effective measures to strengthen the supervision and management of the construction quality of the integrated project, and ensure the implementation of the building energy-saving project quality and energy-saving standards. Seventh, integrated technology product manufacturers should continuously strengthen technological transformation and technological innovation, strengthen product quality control, and ensure that products meet relevant technical standards.

(6) Strengthening policy incentives. Building energy conservation is a systematic project that requires coordination and coordination among various departments. The competent departments of housing and urban construction at all levels must establish and gradually improve the incentive mechanism for integrated technology policies, and further refine the implementation of existing incentive policies, from new wall materials. A special fund is arranged to support the development of integrated technology product research and development and demonstration projects; for the new wall material special fund prepaid by the integrated technology demonstration project unit, the return ratio is appropriately increased. For projects that use integrated technology to obtain star ratings for green buildings, priority is given to the evaluation of the Zhongzhou Cup and Luban Awards. All cities and counties are encouraged to promote the promotion of integrated technology incentive policies, and implement tax incentives for the approved integrated new wall materials and technologies. All departments should implement full-service services to the project implementation units, reduce the work process, simplify the approval process, and create a relaxed environment for promoting the application of integrated technology.

(7) Strengthen publicity and training. The housing and urban and rural construction departments at all levels should strengthen horizontal cooperation and jointly promote the promotion and application of integrated technologies. It is necessary to actively carry out various forms of propaganda activities, give full play to the role of public opinion orientation and supervision, vigorously publicize the advantages of integrated technology, and create a good mass foundation and public opinion atmosphere for promotion and application. For real estate development, design, construction, quality inspection, supervision and other practitioners, organize standardization, job training, technical seminars, on-site observation and other activities to improve the application ability and level of integrated technology. Through policy guidance and technical guidance, we will quickly promote the application of building insulation and structural integration technology in our province.


2. Encourage cities and counties (cities) with integrated technology promotion conditions in the province. In 2014, new projects in the main urban area will vigorously promote integrated technology. Other cities and counties (cities) will launch pilot technologies for integrated technologies by the end of 2014.

3. Support all kinds of demonstration projects, government investment and key projects such as affordable housing, green building projects, renewable energy building applications, and take the lead in adopting integrated technology; other new residential buildings and public buildings projects are preferred to use integrated technology. Guide the green rural housing construction project to carry out pilot demonstration of integrated technology.

4. During the “Twelfth Five-Year Plan” period, five demonstration bases for thermal insulation structure integration with a certain scale will be built, and 10 key enterprises with large production scale, fine technical equipment and excellent product quality will be cultivated.

Third, the work focus

Key promotion technology: after thorough research and demonstration, and through engineering practice, composite reinforced concrete shear wall (CL) structural system, concrete thermal insulation curtain wall building system, laminated film sprayed concrete sandwich shear wall building structure technology, FS outer formwork cast-in-place Concrete composite insulation system, non-load-bearing self-insulation aerated concrete block structure system, cast-in-place foam concrete structure system, etc. as the key promotion and integration technology.

Key areas for promotion: First, government investment and key projects will go ahead. All kinds of government investment projects and key project construction projects will be built in the province. All projects applying integrated technology should be implemented first. The second is the first test of affordable housing projects. Newly built affordable housing in the province, where applicable integrated technology application projects, must take the lead in organizing pilot demonstrations. The third is to promote the overall implementation of cities and counties. National renewable energy building application demonstration cities and counties and green eco-city new construction projects should establish an overall promotion plan, clearly promote the goal, and promote the integration of technology applications in conjunction with the demonstration project. Fourth, commercial projects are encouraged to implement. Guide commercial real estate development projects to promote integrated technology, encourage real estate development enterprises to build integrated technology demonstration communities; support green farm housing construction and application integration technology. Encourage farmers to adopt integrated technology when building and renovating farm houses.

Notice of the Department of Housing and Urban-Rural Development of Henan Province on Further Promoting the Application of Building Insulation and Structure Integration Technology

Yu Jian [2015] No. 88

 

Municipal and municipal directly under the county (city) Housing and Urban-Rural Development Bureau (committee), all relevant units:

Notice of the People's Government of Henan Province on Strengthening Building Energy Conservation (Yu Zheng [2010] No. 72), Henan Provincial Department of Housing and Urban-Rural Development, Notice on Implementing the Implementation Plan of Building Thermal Insulation and Structure Integration (Yu Jian (2014) Since the issuance of the No. 26), the competent departments of housing and urban construction at all levels in the province have actively carried out their work. Through the establishment of a promotion and application coordination mechanism, the introduction of support policies, the development of technical seminars and training services, and the strengthening of standards and regulations, and the implementation of supervision and other measures have formed The experience of Zhengzhou has promoted the promotion and application of building insulation and structural integration technology (hereinafter referred to as “integrated technology”), and achieved certain results, resulting in good social benefits.

With the in-depth development of building energy conservation work, the implementation of green building actions, the modernization of the building industry, and the adaptation of the Fire Protection Code for Building Design (GB50016-2014) to the fire protection requirements of building insulation systems, it is extremely urgent to comprehensively improve the quality and safety performance of building energy conservation projects. The composite thermal insulation wall technology in the building insulation and structural integration technology can effectively realize the same life span of building thermal insulation and structural wall, improve the thermal insulation and structural fireproof performance of the building engineering structure, and meet the "Code for Fire Protection of Building Design" (GB50016-2014). Claim. Now we will put forward specific requirements for further promotion and application of building insulation and structural integration technology.

I. Strengthen organizational guidance and improve the application mechanism

1. Establish a working mechanism. The competent departments of housing and urban construction at all levels should fully understand the importance of integrated technology to improve the quality and safety of engineering buildings, promote the progress of building energy-saving technologies and modernize the construction industry, establish a coordination mechanism for promoting integrated technical work, and strengthen organizational leadership and coordination. Coordination, formulate the promotion and application plan and implementation plan of the region, promote the application of “integrated technology” in a planned and deployed manner, carry out the “integrated technology” research and development and industrialization base construction, and guide the industrialized production of enterprises. Strengthen the target responsibility, incorporate the “integrated technology” promotion work into the annual building energy-saving target assessment system, and report to the units and personnel who have made outstanding contributions, and actively summarize and promote the regional innovation experience.

2. Clarify work goals. Since July 1, 2015, the province's government office buildings, government-invested public welfare buildings, and large-scale public buildings with a single building area of over 20,000 square meters, government-invested or led new-supported affordable housing, demolition and resettlement houses. Such projects should take the lead in adopting “integrated technology”; intensive public buildings such as schools, kindergartens, hospitals, elderly apartments, and welfare homes should give priority to “integrated technology”; encourage commercial real estate development projects to apply “integrated technology”; And the application of "integrated technology" for the reconstruction of rural houses, and the special requirements for fire safety performance or function use, the construction advocates the use of "integrated technology."

Second, strengthen process management and strengthen the main responsibility of all parties

The competent departments of housing and urban construction at all levels shall establish a closed supervision mechanism for building energy conservation, strengthen the supervision of building energy conservation processes, standardize the behavior of all parties, strengthen the main responsibilities of all parties, and ensure the quality, safety and energy saving effects of the project.

The construction unit shall not reduce the building energy-saving design standards, actively select “integrated technology” and products, and reasonably control the incremental cost of building energy-saving projects.

When the design unit selects “integrated technology”, it shall strictly follow the relevant standards and make clear requirements for the performance, construction, installation and use and maintenance of “integrated technology”; in combination with the actual project, ensure that the structural insulation system is reasonable, taking into account the economic application and clear insulation. Life expectancy; we must do a good job in designing the bottom and on-site services.

The construction drawing review agency shall strengthen the review of structural measures, structural systems, and technical parameters of the building insulation and structure to ensure that the performance indicators such as building insulation and fire protection comply with relevant standards.

When the materials are put into the field, the supervision unit shall check whether the performance inspection report of the “integrated technology” system meets the requirements; the supervision plan shall be formulated according to the specific conditions of the project.

The construction unit shall strictly implement the national mandatory standards for project construction, strictly follow the building energy-saving design documents, technical standards and technical points, and strengthen the construction quality process control. It is necessary to formulate special construction plans in accordance with the actual project, implement the design drawings and measures, and strengthen the construction organization. management.

The “integrated technology” holding units and product manufacturers must strengthen product quality control to ensure that products meet technical standards; innovative production models to adapt to industrial development.

The quality supervision agency shall intensify the inspection of the “integrated technology” project, focus on the product type inspection report and quality inspection report entering the construction site, and check the installation and construction of the construction measures. Wall insulation project implementation quality traceability and accountability system, building energy conservation special acceptance record form (including project structure form, external wall insulation technology name, thermal insulation system key technical indicators, construction unit, design unit, drawing review institution, construction unit The supervision unit, the technical responsibility unit responsible for the thermal insulation project and the responsible person shall be filed together with other completion materials for the construction project as the basis for the maintenance, replacement and accountability of the wall insulation project.

Third, strengthen capacity building and promote technology research and development and upgrading

All localities should gradually establish an "integrated technology" support service platform, strengthen the training of employees, improve the technical consulting team, provide full-process consulting services, rely on the green building, construction industry modernization engineering technology research center, build a technology research and development platform, and carry out The research and development of new energy-saving thermal insulation structural system technology, perfect production and application technology, and strive to achieve the "building design standardization, parts production factory, on-site construction assembly, operation management informationization" modernization development model of the construction industry, and promote the development of green building industry.

Fourth, strengthen law enforcement supervision to ensure the quality of engineering applications

Strengthen the closed management and strengthen the supervision of the project construction process. The Provincial Housing and Urban-Rural Construction Department and the relevant departments will regularly check the implementation of various standard measures for green buildings, and correct the changes in the design according to the requirements of the green building standards; Issues such as the management system and mandatory standards for engineering construction shall be investigated for responsibility according to law.

Strengthen the closed management, in accordance with the "Regulations on Energy Efficiency of Civil Buildings" and related standards, strengthen the closed management of the whole process of construction units, design units, review agencies, construction units, supervision units, and quality supervision institutions; departments that fail to perform relevant duties shall bear corresponding responsibility. Intensify law enforcement supervision, increase penalties for violations of laws and regulations on the subject of "integrated technology" application engineering quality, and seriously investigate and deal with projects that are not designed, constructed and constructed according to building energy conservation standards, and will "integrated technology" The energy-saving project is included in the special inspection of building energy-savings carried out regularly at the provincial level, and the inspection results are reported to the whole province.

V. Improve safeguard measures and establish incentives for promotion and application

Establish and improve the promotion and application of "integrated technology" incentive mechanism, increase capital investment, and focus on supporting "integration", modernization technology research and development and engineering application of the construction industry. The "integrated technology" and the modernization structure system of the construction industry will be added to the innovation content of the "Green Building Evaluation Standards of Henan Province". The green building awards and subsidy funds will be given priority to support the application of integrated technologies and achieve the green building evaluation and identification project; In accordance with the "Notice on Several Opinions on Promoting the Stable and Healthy Development of the Real Estate Market" (Henan Political Office [2015] No. 48) of the General Office of the People's Government of Henan Province, "actively support the development of green buildings, and the provincial finance will obtain the two-star operation logo. The affordable housing project will be awarded 20 yuan / square meter, 10 yuan / square meter for the guaranteed housing project with one-star running logo, and the use of housing provident fund loan to buy the two-star running logo and above "green" building For housing, the loan amount can be increased by 20%", and it is recommended to apply for the national green building award fund. The special fund for new wall materials at all levels should focus on supporting the R&D and upgrading of “integrated technology” products and the construction of green building demonstration projects, and the application of “integrated technology” new wall materials and the evaluation project of green building star rating. Timely return the special fund for new wall materials that has been levied, and increase the proportion of return to the first, second and third grades according to the policy; for the projects that have obtained the star rating for green buildings, give priority to recommending the evaluation awards such as Zhongzhou Cup and Luban Award. project.

6. Carry out publicity and education to improve the ability and level of technology application

The administrative departments of housing and urban-rural construction at all levels shall actively carry out multi-level and multi-form publicity activities to publicize the policies promulgated by governments at all levels in promoting the application of “integrated technologies”, and promote good experiences and good models throughout the country; The training plan, for development, design, construction, quality supervision, supervision and other practitioners, through the organization of meetings, organization of observation, distribution of information, etc., regularly carry out standard publicity, post technical training, so that practitioners are proficient in various "integration "Technology" application scope, technical characteristics, quality assurance measures, etc., and strive to improve the ability and level of application of "integrated technology."



Building energy efficiency and structural integration prospects

The trend is to do the future, building energy efficiency and structural integration is the development trend of building energy-saving insulation industry. In 2016, the General Office of the State Council “Guiding Opinions on Promoting the Stable Growth of the Building Materials Industry and Strengthening the Structure and Increasing Benefits” clearly stated that it is necessary to develop intrinsically safe, energy-saving and environmentally-friendly, lightweight and high-strength wall and roofing materials and exterior wall insulation materials. This has pointed out the direction for the development of the industry.


Housing industrialization, finished building components and assembly can be the mainstream way of building construction in developed countries. Building energy conservation and structural integration under the protection of residents' life and property safety, in line with the development trend of finished building products and on-site construction assembly, its building energy-saving and structural integration construction model represents the industry's leading solution, building energy efficiency The insulation industry is heading towards the road of new industrialization, with good development prospects and huge market potential.



There is value in the future, and there is demand in the market. Today, with more and more people paying attention to safety, with the strong support of the government, under the demonstration effect brought by mainstream real estate developers Vanke, Evergrande and Sunac, the tens of billions of markets for building energy conservation and structural integration have Created, and will soon rush to the next vent.


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