(Infiltration waterproof system (Shanghai) Co., Ltd., Shanghai 201108) The development status of single-layer roofing technology in Europe and the United States, and put forward the view of the development of China's current domestic single-layer roofing system.
System; Padding System; System Accessories; System Construction Process Standards and Engineering Methodology 1 Overview of Single-Layer Roofing Concepts 1.1 Overview A single-deck roofing system is a roofing system in which a single-layer membrane is a flexible waterproof layer. Single-layer coils refer to flexible coils mainly composed of synthetic polymer coils and mainly include two major categories, namely thermoplastic coils such as polyvinyl chloride (PVC), polyolefins (TPO), and thermoset coils such as three. Yuan ethylene propylene (EPDM). In the United States and Europe, high performance modified asphalt (SBS, APP) coils are also considered as a single layer roofing system material. The coils are joined together by different methods. They form a complete and durable roofing system with insulating materials and supporting structures.
1.2 Advantages of single-story roofing Asphalt and other on-site construction methods containing harmful ingredients are compared to single-story roofing using high-quality elasto-plastic composite coils produced under indoor plant conditions. The coils have better strength, Elasticity and long-term performance, and can be used in a wider range of applications through different fixing methods.
The membranes used in single-layer roofing are resistant to weathering, chemical oxidation, and UV radiation. Different coil formulations allow them to adapt to different climatic conditions and the coils can be directly exposed to the atmosphere. In general, no additional protective layer (except roofs) is required on the coil.
Single-story roofs provide the largest choice for new construction and maintenance projects in roof design, performance and appearance. According to different needs, a single-layer roof can be designed as a mechanical fixing system, a pasting system or a pressing system; its appearance can be selected from rich colors or light-colored sheets with environmental protection, energy saving and high reflectivity. The coils can also be beautifully welded. Decorative strips or laid wearable walkways. Single-layer roofs have a wide range of applications. They can be used not only in various low-slope large-span roofs, but also in inclined roofs and curved roofs.
The application of single-layer roofing (especially thermoplastic roll roofing, which is widely used in Europe) has its unique advantages: 1) quick and easy construction; 2) lower initial cost and maintenance operating cost in use; 3) multiple construction methods , Hot air welding, adhesives, and mechanical fasteners, etc.; 4) Rigid insulation with light weight and good heat preservation effect; 5) Effective control of air permeation to meet new energy saving requirements; 6) Small thickness of roof structure The design freedom of the architect is greater; 7) The repair is convenient. When the roof is partially adjusted or needs to be renewed, it is easy to handle; 8) The details are simple to handle and have strong adaptability.
Single-layer thermoplastic web roofing systems also have significant environmental effects: they have good durability. Single-layer thermoplastic coils have a long life, generally more than 20 years, and a durable roof system is the best protection for the environment.
Low energy consumption. Thermoplastic coils are easy to install and weld, require low energy consumption; and welds, mechanical fixation and bonding do not require open flame or hot melt bonding, will not produce waste; When the use of mechanical fixation 2006 Supplement China Building When the waterproof 754 system and the calender fixing system, the environmental conditions had little effect on the system construction. In the production process, the most commonly used 1.5mm PVC coils require less energy than most other roofing materials.
Low natural resource consumption. Thermoplastic coils are generally 1.14.8mm thick and 1.5Ukg/m2, and their energy consumption for transportation and the energy consumption of the light roof made of them are very low.
Easy to recycle. Single-layer thermoplastic roll roofs are easily removed.
After its useful life is completed, the coils can be easily stripped, recycled, and reused to avoid becoming garbage that needs to be disposed of. At the same time, the scrap produced during the production of thermoplastic coils can be re-established as a raw material for production. Some PVC manufacturers in Europe have been recycling waste thermoplastic coils since 1994 to save natural resources.
2Europe and the United States single-layer roof technology development status Single-layer roofing system technology in Europe and the United States is already quite mature, its fixed system is perfect, including mechanical fixing system, pasting system and pressing system; the market is mature, whether it is waterproof membrane or insulation material, or It is a fixture and adhesives system accessories, there are a large number of world-renowned suppliers; construction of a high degree of specialization, a professional contractor and trained professional construction workers; supervision in place, a variety of standards and corresponding testing agencies complete; industry With a high degree of transformation, there are currently three single-storey roofing associations: the European Single Waterproof Association (ESWA), the British Single Roof Association (SPRA) and the United States Single Roof Industry Association (SPRI).
2.1 Single-Layer Roofing System The single-layer roofing system is mechanically fixed, glued, and pressed. Each type of fixing system has its own unique advantages, as shown in Table 1. 2.1.1 Mechanical fixing system The mechanical fixing system uses special fixtures to mechanically fix single-layer waterproofing membranes and roofing materials such as insulation and vapor barriers. On the roof base, the web overlapped by welding or hot-melt bonding to connect the waterproof membrane into a complete integrated waterproof layer (fixed parts below the coil).
The system is based on the critical experimental protocol of the EOTA (European Technology Certification Organization) system, through the dynamic wind-borne destruction simulation experiment conducted in the wind load laboratory, to determine the allowable load value of the system under the comprehensive factors and use it as the basis for system design. . System fixing requirements Table 1 Advantages of various fixing systems Comparison of fixed methods Mechanical fixing Pressing and pasting systems Each layer can be constructed separately. Mutual effect Small systems are firmly fixed at all levels, have sufficient resistance to wind loads Surface exposure, easy to check energy Well adapted to the appropriate deformation of the elastic roof Self-weight Light to the low roof slope requirements Low climate requirements Demolition is simple, easy to material recovery Fire protection requirements Low durability, cost-effectiveness Successful application of several decades The number of fixtures in practice depends on local standards The results of wind load calculations.
The common structural hierarchy of the system is from the bottom to the top: the mechanical strength of the waterproof membrane in the mechanical fixing system of the structural layer (reinforced concrete, steel plate, etc.) insulation layer (rock wool, extruded polystyrene board XPS, etc.) under wind load Such as the tear strength, tensile strength and other requirements are very high, so generally used with high-strength reinforcement rib coil. The presence of stiffeners allows the coils to maintain excellent performance over long-term frequent temperature and climate changes, maintain relatively low deformation rates under long-term dynamic wind loads, and increase system stability.
The mechanical fixing system can be divided into a fixed point system and a fixed line system according to a fixed method.
The point fixing system is a mechanical fixing system that fixes the coil to the roof base layer with the special metal washers and screws as main fixing members. Fixtures are placed under the lap web or covered with a special web cover strip; the spacing between the fasteners is calculated based on the project's requirements for the air-float force.
The wire-type fixing system is a mechanical fixing system that fixes the coil to the roof base with a dedicated fixed bead, and the press-stick is fixed with a screw. The fixed bead is placed under the lap web or covered with a special web cover strip; the spacing between the fixed bead and the bead fastener is calculated based on the project requirements for the air-float force.
The mechanical fixing system is not limited by the wind load and slope. The construction is convenient and fast. It is suitable for new roof and roof renovation projects of any size. It is often used for roofs that are easily fixed such as steel plates and wooden boards. 2.1.2 Adhesive System Adhesion system, that is, single-layer waterproofing membrane adhesive is adhered to the base layer in accordance with the shape of the roof, and the adhesive force of the adhesive is used to resist the wind load. The overlapped portion of the coiled material is welded or hot-melt bonded to be waterproof. The web is connected into a complete waterproof layer.
The common structural layers of the system are from the bottom to the top: the structural layer (reinforced concrete, etc.), vapor barrier (polyethylene, asphalt, etc.), if required insulation (rock wool, extruded polystyrene board XPS, etc.) single-layer waterproof membrane Sometimes in order to ensure the cohesion of the web and the substrate, a concrete or mortar leveling layer is often placed under the web. When no insulation or vapour barrier is required, if the base layer is rough, such as a cast-in-place concrete base layer, a roll with a non-woven fabric is commonly used, which can overcome the poor quality of the surface of the base layer and can provide strong wind resistance. Tori and impact resistance.
According to the fixed form of each level, the paste system is divided into a local paste system and a complete paste system. In the local pasting system, only the web is pasted on the base layer, and the vapor barrier layer is blank, and the insulation layer is mechanically fixed. In the completely pasted system, all layers are fully adhered to the corresponding substrate.
The paste system is generally suitable for medium and small roofs. Its quality depends on the coil and the adhesive used. The finished surface is very smooth and is often used for colored roofs with beautiful appearance.
The paste roofing system is the perfect choice for modern architecture. The system gives architects free design space in appearance, color, and detail.
However, no matter how exaggerated the design of the building, the paste system can provide owners with reliable and high-quality roofing. The system's roof is durable and requires minimal maintenance.
2.1.3 Pressing system The single-layer waterproofing membrane is to be laid on the roof base and only fixed within a certain range with adhesives or fasteners. The overlapped parts of the coils are welded or hot-melt bonded to connect the waterproofing membranes. Integral waterproof layer, and then according to actual needs, laying a pressure layer on top of the use of waterproof layer on the press to resist wind load. General press products are human walkways, roof panels, gravel, and soil.
Pressing roofing system can meet different roofing functions and requirements of owners, and is divided into the following categories according to the actual application.
Master's roof: Mainly suitable for pedestrians, can withstand the weight of the roof. The waterproof membrane and the human walkway are separated by a barrier and a protective layer. Different walks are set according to the final function.
Driving roof: Mainly suitable for driving roofs that can withstand large weights. Between the waterproof membrane and the traffic surface is separated by a barrier and a protective layer.
Different types of travel boards are set according to the final function. A typical upper/roofing roofing system level is from the bottom to the top: structural layer insulation layer (high compressive strength) insulation layer (such as polyethylene products), such as the need for human walkways or concrete base planting roof : The roof of planting plants on the roof has the function of improving the ecology and beautifying the environment. According to the different types of roof vegetation, the structural levels are also different, usually include: structural layer vapour insulation insulation layer root penetration through the material moisture blanket drain plate filter layer growth medium 2006 supplement Chinese building waterproof inverted roof, will soon insulation layer Spread over the waterproof layer, the insulation layer protects the waterproof layer. However, this kind of house has higher requirements for the thickness of the insulation layer, and the insulation layer is limited to the use of extruded polystyrene insulation boards or similar products. Planting roofs can be used on inverted roofs, but insulation properties and moisture penetration factors of the insulation must be carefully considered. The level of the inverted roofing system under a typical press fabric is from the bottom to the top in the following order: Structural layer single-layer waterproof membrane insulation (non-woven, etc.) Insulation (higher compressive strength and hydrophobicity) Walkway or The concrete slab press system is the best choice when the roof structure is strong enough. It is suitable for small and medium-sized roofs that emphasize aesthetics or functionality, but is not suitable for roofs with slopes larger than 2/12 or higher and windy. .
2.2 Single-Layer Roofing System Materials The materials for a single-story roofing system include waterproof membranes, auxiliary materials such as heat insulation, sound insulation, and vapor barriers, and system accessories such as mechanical fasteners, adhesives, sealants, and drainage components.
2.2.1 Waterproofing membranes In Europe, thermoplastic membranes used for waterproofing of single-layer roofs include polyvinyl chloride (PVC), ethylene-vinyl acetate and asphalt blends (ECB) that began to develop in the 1950s. Ethylene-vinyl acetate copolymer (EVA), chlorinated polyethylene (CPE), and the increasingly mature elastomeric polyolefin (TPO) market from the 1980s. In order to ensure waterproof performance, the thickness of these single-layer roofing membranes is generally not less than 1.2mm. So far, PVC has accounted for about 2/3 of the share, and the rest accounts for the remaining PVC waterproofing membranes since the 1950s. Since it has a history of more than 50 years, its production technology and application technology are quite mature. With good material properties and resistance to various environments, the service life of PVC coils generally reaches 20 years or more, and the durability can pass. The inspection of the actual project; and, when the PVC coil reaches the end of its useful life, it can be easily peeled from the roof and returned to a dedicated factory for recycling.
The U.S. single-storey roofing industry association believes that coils used for single-story roofing mainly include thermosetting coils, thermoplastic coils, and modified asphalts.
There are several kinds of thermosetting coils, such as EPDM and neoprene, but the most important and most viable variety is EPDM, which is often called rubber roofing. EPDM membranes have a long service life, have the ability to continue exposure in strong sunlight, and resist the ability of other chemicals that cause membrane damage. The seams are generally connected with a special adhesive or adhesive tape. The shape of the rubber web remains good, but the cost of cleaning and repairing seams is very high.
Thermoplastic coils are plastic polymer-based materials, the most common being polyvinyl chloride (PVC) coils. The distinguishing feature of thermoplastic webs is the use of hot air welding or chemical welding of seams, with seam strength not less than that of the web. Most thermoplastic webs contain stiffeners to increase strength and dimensional stability. Common stiffeners are polyester webs and glass fibers.
Modified bitumen membranes are traditionally used for construction installation of laminated roofs.
Its material composition includes bitumen and rubber or plastic components (such as SBS and APP) used to "modify" and improve plasticity, as well as ribs used to increase strength and stability, and products are prefabricated at the factory. The type of modifier determines the method of coil installation. Some are coated with hot asphalt, some are hot melted with torches, and some are cold glued.
How to choose the right single-layer roofing membrane depends on many factors, but the most important is the cost. However, factors such as building height, wind load, expected roof traffic and aesthetics must be taken into account in addition to costs.
2.2.2 Auxiliary materials The auxiliary materials used in single-layer roofing systems include insulation materials, sound insulation materials, vapor barriers, and non-woven fabrics.
Insulation materials: Usually include extruded polystyrene board (XPS), rock wool board, polyurethane board, and polyurethane board, among which extruded polystyrene board (XPS) and rock wool board are the most common. Extruded polystyrene sheet is a foam material produced through an extrusion production process and has a cellular closed-cell structure; its thermal insulation performance depends on the thermal insulation of pores and cell walls in the cell structure; it is not easy to get wet and easy to construct. Rock wool is a non-combustible, fibrous material produced by melting mineral components at high temperatures (11,004,500*C). Its thermal insulation properties depend on the air that accumulates between fibers perpendicular to the direction of heat flow.
When the designer decides the type and thickness of insulation materials, the following factors should be generally considered: Compatibility with other roofing materials Roofing during construction and after construction Steam barrier: The vapor barrier is usually polyethylene and sealed with butyl tape. All lap sides. If bituminous vapor barriers are used, they must be hot melted or cold adhered to the substrate. All piercing components must be sealed. The vapour barrier reduces the wind pressure inside the roof and reduces the risk of condensation inside the roof.
Non-woven fabric: Non-woven fabric is a non-woven fabric composed of unsaturated polyester. It can be used as a protective layer, buffer layer or barrier layer to provide various forms of protection for waterproofing membranes. For example, in a press roofing system, the use of a protective layer can prevent mechanical damage to the coil.
2.2.3 System Components System components used in single-layer roof systems include mechanical fasteners, adhesives, sealants, drainage components, and so on.
Mechanical Fixtures: Mechanically fixed coils and insulation materials used in roofing systems are often used for special fixtures. These fasteners include screws, bolts, and the like, and are used to fix a bead, a gasket, a collecting bead, and the like on a suitable substrate such as a steel plate. Fixtures generally must have relevant anti-corrosion requirements.
Adhesives: Adhesives in elastomeric roll roofing systems are often used to hold coils, insulation boards, and floodings on various substrates, or for layer-to-layer, coil, and web overlaps. Different adhesives are available for different applications such as coils, insulation boards and flooding. Since the chemical composition of the coils varies, selecting materials compatible with the adhesive is the key to good bonding results.
Sealant: The sealant in the elastomeric roll roofing system is used to prevent water infiltration. Sealants are used in a wide range of applications, including web closures, flooded seams, and spout seals, cross-drain and downspout detailing for gap seals, and as the primary sealant for a variety of closures and piercing components. A wide variety of sealant materials, choose the right sealant for different applications to ensure construction quality.
Drainage prefabricated parts: accessories such as water intakes that drain or gather roof water. If there is no effective roof drainage, rainwater and cooling system water will gather together and increase roof load. In cold weather, frozen water will freeze, which may lead to adhesive failure and roof material damage.
Pavement panel: A panel that is placed on the surface of a pedestrian or a press system that is placed on a roll. Most decking panels are of the concrete type, and some are prefabricated polymer polymers or rubber materials. Paving panels are often used to increase the ability to resist wind loads or provide a non-slip walking surface.
2.3 In addition to the need for excellent waterproof materials and scientific and rational system design, the successful construction of a single-storey roofing system is not to be neglected. In Europe and the United States, the single-story roofing system technology is quite mature and the construction specialization level is very high. There are special roof construction contractors and professional construction teams, so as to ensure that the single-story roofing system technology can be installed and installed according to design requirements and serve the owners.
2.3.1 Professional contractors outside the country, roof contractors generally have to pass the coil manufacturer certification before they can install the coils produced by the manufacturer; certified contractors can also buy directly from the coil suppliers. Affordable, high quality coils.
The construction of roofing systems generally adopts the overall contracting mode, that is, all the materials (including waterproof materials, other roof layers such as insulation layers, vapor barriers, etc., system accessories such as fixed parts, etc.) used in roofing projects, and the materials for each roof level The construction and installation quality and construction progress are all responsible for a package of responsibility, avoiding the phenomenon of unclear and unreasonable responsibility for the occurrence of project quality problems due to various reasons in the waterproof project. The entire 2006 supplement of China Construction Waterproofing 794 body contraction enables the construction of the roofing system at all levels to cooperate effectively and ensure the construction efficiency and quality.
Professional construction workers In Europe and the United States, all personnel involved in the construction of the roofing system must undergo professional training and certification to meet the construction requirements for the installation of a particular coil. Other construction personnel at the roof level can only be constructed after corresponding professional training. All construction personnel hold certificates to ensure construction quality.
2.4 Supervision is in place, various standards and corresponding testing institutions are complete 2.4.1 Design Manual According to different products and fixed systems, European and American companies have corresponding design manuals. The European and American single-layer roofing three associations - the European single-layer waterproofing association (ESWA), the British single-story roofing association (SPRA), and the United States Single-story Roofing Industry Association (SPRI) have specified detailed system design manuals and technical requirements. For example, SPRA has published the "DesignGuide for Single PlyRoofing" on its website for use by those in need.
2.4.2 Material Standards Materials used in single-layer roofing systems have strict standards in Europe and the United States, such as Germany's DIN standards (since 1976), Swiss SIA standards (since 1977), British BS standards, and the United States. The ASTM standard (since 1985).
There are many corresponding testing and certification organizations for single-layer roofing systems of testing and certification organizations, such as EOTA (European Technology Certification Organization), BBA (British Board Assessment), material certifications such as EMPA (Swiss Federal Agency for Materials Testing), and SKZ (Germany Nande Plastics) (center), FLL (German Landscaping Research and Development and Construction Association), and the wind load standard of FM (American Ambrose Insurance Co.), the LEED green building evaluation system of USGBC (United States Green Building Council), and the adoption of *EnergyStar* ( * Energy Star "marks plans to play a role in the U.S. federal government and so on.
2.5 High degree of industrialization, there are currently three single-tier roofing associations 2.5.1 European Single-Layer Waterproofing Association (ESWA) The European Single-Layer Waterproofing Association (ESWA) is a non-profit organization headquartered in Brussels, Belgium, representing Europe's major thermoplastics. material supplier. ESWA's mission is to represent the interests of the industry, enhance the image of the industry and become the mouthpiece of the industry for the European government's public institutions. ESWA's goals include promoting innovation and safe and reliable system solutions from production to application, providing product users with optimal economic and ecological benefits. The European single-layer waterproof association administers three working groups: marketing and media, environment, and technical committees.
The ESWA Market and Media Working Group conducts effective communication with government agencies, mainly including the advantages of thermoplastic roofing membranes and the dynamic development of the thermoplastic roofing waterproofing industry in Europe; internally ensuring communication among internal members and interaction with other professional organizations.
The ESWA Environmental Working Group is concerned about EU environmental protection legislation, collecting and evaluating environmental market information, and supporting the association's participation in the environmental protection field. The life cycle analysis of the roofing system and the recycling of additives and thermoplastics are also the responsibility of the team.
The ESWA Technical Committee Working Group focuses on the European Standards and represents the participation of members in the formulation of major standards and regulations. It represents the association's exchanges with other professional associations, coordinates work, and promotes cooperation.
Sika and other internationally renowned companies. The combined sales of its members account for more than 85% of the European thermoplastic waterproof material market, and this figure is steadily rising. In 2001, Europe produced 65 million m2 of thermoplastic roofing and other single-layer roofing waterproofing materials, of which PVC accounted for about 2/3 of the total.
The European Single-Layer Waterproofing Association, which aims to promote cooperation between the European Community and the world, is devoted to the study and discussion of the problems of the synthetic polymer waterproof material industry in terms of science, technology, economy and systems.
2.5.2 British Single Roof Association (SPRA) The British Single Roof Association (SPRA) is the UK's leading authority on polymer waterproofing materials. Its purpose is to ensure that customers obtain high quality through cooperation with qualified manufacturers and contractors. Molecular material monolayer roofing system. Its cooperative members are divided into five categories: the coil manufacturers and their wholly-owned subsidiaries and distributors.
Auxiliary parts manufacturers, that is, manufacturers of auxiliary parts in single-layer roofing systems, such as insulation materials, sound insulation materials, vapor barriers, floor boards, lightning protection devices, drainage, factories, and safety equipment manufacturers.
Raw material suppliers are professional institutions, trade cooperation associations and suppliers that provide raw materials and production process products for the industry.
Installation contractor, a roof contractor that is certified or approved to install one or more coils.
Trained and certified installers are those who can hold one or more coil training certificates.
The British Single Roof Association has strict membership requirements and examination conditions. The following are some of the major provisions.
The coil manufacturer shall comply with the following provisions: All coiled products must be certified by BBA or Wimlas Laboratories in line with UK requirements and relevant design manuals. Design proposals are provided. On-site training and technical support staff are certified on-site training facilities and training certified by Association Committees. Content and assessment procedures Product and construction warranty period of at least 10 years For a project to be covered by warranty, a systematic and complete on-site inspection record shall be followed by the manufacturer. The product manufacturer shall meet the following requirements: The product complies with relevant British and European standards. Mechanically fixed nails must have separate According to UEAtc's anti-corrosion certificates, the Commonwealth-specific test facilities have on-site training and technical support personnel. The contractor shall meet the following requirements: The quality management system shall comply with ENISO's complete training records certified by the Association's coil manufacturer(s). Or the approved installation certificate has training and evaluation procedures that comply with national regulations. 2.5.3 The American Single-Layer Roofing Industry Association (SPRI) The American Single-Layer Roofing Industry Association (SPRI) is recognized as the authoritative technical and statistical agency for the single-storey roofing industry. It provides members with the best industry platform to focus on the latest technology and key topics in the industry. As a commercial institution, compared with each member, the association can focus on effectively improving product quality, installing technical and manpower training, and other common industry issues. As an industry platform, the association can help each member company to operate more effectively in the roofing market and gain greater market share for the entire single-storey roofing industry.
SPRI represents the supplier of waterproofing membranes and related accessories for the commercial roofing market. Founded in 1981, the association serves clients, architects, engineers, contractors and building maintenance personnel, providing them with targeted information about roofing systems and accessories.
The association spared no effort to conduct high-quality education in the industrial industry. The focus of its attention was: Actively promote technology to solve technical problems Intervene and influence the formulation of standards and test methods Focus on legislation and regulations related matters for energy conservation, recycling and other sustainable development The materials and systems provide accurate data for SPRI members ranging from roofing system solution providers (coil producers) to system parts manufacturers, from raw material suppliers to consulting companies and testing organizations including Carlisle, Firestone ( Firestone), seepage 2006 supplement China Building Waterproof 3 domestic development trend and some suggestions 3.1 The current domestic single-layer roofing system development and the challenges faced In China, the earliest introduction of a single-layer roofing system is Swiss Infiltration waterproof company. Infiltration China was founded in 1998. Over the years, Permead has continuously introduced new products, new technologies, new systems, and new processes, which has greatly promoted the development of single-story roofing systems in China. The famous model projects of Infiltration include: Jinan Spring City Plaza completed in 1999, a total of 280,000 m2, which is a publicly-built underground plaza, adopts an empty shop system; Zhejiang Jiaxing National Grain Reserve Bank, a fully-glued system with a total of 30,000 m2; Beijing Nokia plant 22,000 m2 is the first system in China to meet the typical mechanical fixed roof structure level. It was completed in 2001; three Bosch plants in Suzhou, Wuxi and Changsha totaled 120,000 m2, which is a mechanical fixed roof system; last year and this year The construction of Guangzhou Honda is currently the largest single single-story roofing project, with a total roof area of ​​180,000 m2, and it is also a mechanical fixing system.
At the same time, other foreign brand suppliers have also tried in the single-story roofing area. Well-known companies include Carryle, an EPDM supplier, and Firestone, a domestic company operating through an agency. , Icopal, etc. using thickened modified Zhejiang green coils. The single-layer roofing suppliers in China are mostly suppliers of PVC waterproofing membranes with relatively small scale.
In general, single-layer roofing is still a non-mainstream waterproof material and system in China, which is mainly reflected in the lack of clear national regulations. The requirements of the current GB 50345*2004 "Technical Specifications for Roof Engineering" and GB 50207*2002 "Code for the Acceptance of Quality of Roof Engineering" define the requirements for "reasonable service life of waterproof tiers" and "number of fortification requirements". Since the current "precautionary period of use of the waterproof layer" in the waterproof design is judged to be non-standard and difficult to judge in actual use, the designer will use the quantifiable "waterproof layer" as the basis. As a result, it often leads to a lack of quality, low-end materials are still popular due to the requirements of the number of waterproof layers, and the promotion of high-quality long-life single-layer new waterproof material is under great pressure.
Domestic single-storey roofing suppliers do not yet have their own industrial platforms. Each of the manufacturers is their own company. The promotion of the entire single-storey roofing industry and the propaganda in the construction industry are not enough.
At the same time, some relatively small-scale single-layer roof suppliers have poor system concepts. A considerable number of manufacturers still attach importance to the production and promotion of the main product material, namely coils, and disregard the supporting applications of accessories and other related materials of the system. Due to the short development time of single-storey roofs in China, the industry as a whole lacks professional contractors and construction teams.
All of this has led to greater resistance to the development of single-layer roofing systems in China, and the advantages of single-layer waterproofing cannot yet reach its due height.
3.2 Several suggestions Based on the current domestic actual situation, it is recommended that industry experts better interpret the requirements of the existing waterproof grades in GB 50345*2004 "Technical Code for Roof Engineering" and GB 50207*2002 "Code for Quality Acceptance of Roof Engineering". The so-called waterproof rating, its goal is "effective life", which is the ultimate concern of the customer. "Fortification Requirements"
(ie, the number of fortification layers) is only one of the means to achieve "effective years of use." We must not put the cart before the horse. As for how to judge the "effective period of use," it can be quantified by other methods. For example, the long-term performance of a coil used for exposed roofs can be judged by the length of time for the artificial weathering test, and the non-exposed type can be considered by the thickness of the coil. In addition, the length of the supplier's warranty period and the development of the maintenance contract for the roof system are also guarantees for the "effective period of use." Of course, in this case, customers should be more cautious when selecting suppliers, fully consider the supplier's reputation in the industry and their comprehensive strength, so that in the future, if the waterproof system fails, it can find the responsible person.
At present, industry experts have proposed that those well-known single-layer waterproof companies in China and abroad that have accumulated rich practical experience abroad and have successfully practiced in the domestic market should actively formulate system construction process standards for their respective brands or The construction method will lay a solid foundation for the long-term development of the single-layer roofing system in the domestic market.
At the same time, single-layer waterproof suppliers should exert their subjective initiative. With the strong support of the Waterproofing Association, China’s single-layer roofing waterproof professional committee should be established as soon as possible to establish an industrial platform. The single-layer roofing waterproof professional committee can learn from the European and American single-storey roofing associations, provide internal members with industrial information and exchange channels, participate in the formulation of external standards, strengthen cooperation with other professional organizations, and strengthen the concept of single-layer waterproofing system. Pay attention to the development of system accessories and research on construction application technology; push forward the construction contracting method for waterproofing and thermal insulation of the roof system; ensure the implementation of the “warranty period†system for the service life of the waterproof layer; promote professional contractors and construction teams and construction technology Workers' training and certification system; Strengthen self-promotion of single-storey roofing in the construction industry.
With the joint participation of associations, professionals and domestic and foreign brand system suppliers, a single-deck roofing system will surely be able to achieve great development in the domestic market, as soon as possible in line with the industrial development of developed countries and regions, and in the waterproof market, especially The steel structure roof market strives for a greater share.
European Single Waterproof Association (ESWA) official website: British Single Roof Association (SPRA) Official Website: SPRI Official Website: Ge Zhao, male, born in 1968, graduated from Tongji University in 1990. Professional in Civil Engineering and Civil Engineering. He received a master's degree in Industrial System Engineering from National University of Singapore in 1999. He once worked for Shanghai Jianshe No.2 Company, BRC Asia Limited. He is currently Director of Product Management of Permeation Waterproofing Systems (Shanghai) Co., Ltd.
Jiang Yonglin, male, born in 1980, product manager of Permeable Waterproofing Systems (Shanghai) Co., Ltd.
Contact address: No. 4555, Huaning Road, Xinzhuang Industrial Development Zone, Shanghai, 201108, Tel. 2006 China Building Waterproofing 834
Rock Reamer,HDD Hole Opener Rock Reamer ,HDD Drilling Tricone Rock Reamer,HDD Rock Reamer Bit
CANGZHOU GREAT DRILL BITS CO., LTD , https://www.pdcbits.nl