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22 types of thermal insulation materials

Updated: Apr 30, 2023

Thermal insulation materials are classified into organic materials, inorganic materials, and composite materials according to their properties. Different thermal insulation materials have different properties and prices, here we will rank them by their thermal conductivity and introduce their composition, effect, application for you to choose the right option.

1. vacuum insulation board, thermal conductivity 0.008 W/(m · K)

The top ranked panel is definitely vacuum insulation board, which is a high-efficiency thermal insulation board made of inorganic fiber core material and high gas resistance composite film through vacuum packaging technology, and coated with special interface mortar.

insulation material 1

The thermal conductivity of air is approximately 0.023 W/(m · K). Only vacuum is possible to achieve a lower thermal conductivity than air. Therefore, there is no doubt that the thermal conductivity of vacuum insulation panels is the lowest among existing insulation materials. Its biggest advantage is that its thermal insulation performance can surpass all other types of thermal insulation materials. However, this material also has shortage such as the problem that it is difficult to maintain the vacuum degree, if there is damage, the thermal insulation performance will plummet, secondly, construction flatness requirements are also high, and arbitrary cutting is not allowed. Of course, almost all thermal insulation systems have different defects, and the above-mentioned defects of vacuum insulation panels cannot conceal their excellent thermal conductivity index and fireproof performance. This is enough to make it stand out from all types of insulation materials in the world.

Although vacuum insulation materials originated abroad, china domestic enterprises are the most daring to attempt to use this material for exterior wall insulation systems. Thanks to a group of domestic thermal insulation panel manufacturers that have taken the lead in the research and development of professional vacuum panels and have made bold innovations and attempts in the field of building energy conservation, the vacuum thermal insulation panel external insulation system has become one of the important solutions for building exterior walls in some regions of China, and has even been applied in passive low energy consumption buildings in the north. The performance of this thermal insulation board is good, and there are individual problems with the overall thermal insulation system. However, the safety issues of building exterior wall thermal insulation and energy conservation are always accompanied by building energy conservation projects, and more enterprises in China must continue to explore and innovate!

2. aerogel thermal insulation material, thermal conductivity 0.02 W/(m · K)

Aerogel material is called the lightest solid in the world. With Nano silica aerogel as the main material, it is compounded by a special process. It has excellent properties such as high temperature resistance, low thermal conductivity, low density, high strength, green environmental protection, waterproof and incombustible. At the same time, it has excellent sound insulation and shock absorption performance. It is an indispensable efficient heat insulation material in metallurgy, chemical industry, national defense, aerospace and other fields.

insulation material 2

This product combines thermal insulation and fire resistance, making it a rare material. However, even in Europe, this material has not been widely used in the field of construction projects, since firstly the cost of this product is really too expensive, secondly, for the main components of the external insulation system that withstand the cold and heat cycles, this product still needs to undergo more tests. Currently, there is no domestic engineering case to prove the reliability of its application for external insulation of external walls. According to the national conditions of china, aerogel materials will remain in the laboratory for a long time, and it seems very unlikely to be applied in the field of external thermal insulation.

3. foamed polyurethane, thermal conductivity 0.024 W/(m · K)

Among the single organic thermal insulation materials, polyurethane thermal insulation materials have the best performance. According to the process, it is divided into injected polyurethane and factory prefabricated rigid polyurethane board.

insulation material 3

Injected polyurethane is a two-component hard foam material with thermal insulation and waterproof functions, which is made of isocyanate and polyol (combined polyether or polyurethane) as the main raw materials and added with additives.

Injected polyurethane has excellent integrity and waterproofing, so it is very suitable for thermal insulation and waterproofing of roofs and basement walls covered with soil. It is applied to thermal insulation within dry hanging curtain walls, facilitating construction and operation, and minimizing thermal bridge effects. Rigid foam polyurethane board is a derivative product. Due to poor dimensional stability, there is no significant difference compared to expanded polystyrene board. Some manufacturers have provided composite polyurethane coated with mortar on both sides to pass grade A fireproof test reports before, but after the introduction of the new fire inspection standards, this composite insulation board covered with mortar on both sides cannot be tested as fire rated A.

4. extruded polystyrene board, thermal conductivity 0.028~0.030 W/(m · K)

Extruded polystyrene board is also a type of polystyrene board, but the production process is extrusion molding. Extruded polystyrene board, also called XPS board, is a rigid foam plastic product with closed cell structure made by heating extrusion molding with polystyrene resin or its copolymer as the main component and a small amount of additive.

insulation material 4

Currently, it seems that only the Chinese market uses extruded panels as a material for external thermal insulation and thin plastering. It can be said that extruded polystyrene board is also a combination of waterproofing and thermal insulation, with high stiffness, good compressive performance, and low thermal conductivity. It is very suitable for thermal insulation in roofs, floors, and basement wall coverings. However, this type of plate has poor vapor permeability, poor dimensional stability, and poor adhesiveness to inorganic bonded mortar. It is commonly used for quality accidents such as system peeling and surface cracking in external wall insulation. Due to its inexpensive cost, this material has no greater advantage than expanded polystyrene plate in the field of external insulation applications. The use of extruded polystyrene boards in exterior wall insulation systems is not recommended.

Considering the requirements of environmental protection, the regulations for the production of extruded panels in foreign standards are carbon dioxide foaming. In China, due to the excessively stringent thermal conductivity standards, most manufacturers use Freon foam. From the perspective of green building materials, what is the environmental benefit of this kind of insulation board produced at the cost of destroying the ozone layer? In the future, as environmental protection becomes increasingly important, the country will definitely recommend using carbon dioxide foam extruded panels. Of course, the thermal conductivity of this panel is only 0.035 W/(m · K) or above, which means it does not have the current good ranking.

5. inorganic polymer insulation board, thermal conductivity 0.030 W/(m · K)

insulation material 5

This is a thermal insulation material that has not been used in the field of external wall thermal insulation projects. The inorganic polymer board is surrounded by a strong and tough calcium carbonate film using polyvinyl chloride resin, and has an extremely well insulated closed space assembly. It is an inorganic foam material that will not burn or melt under the flame. It forms carbonization in a small part of the area under long-term flame, and maintains its original shape. It is a Class A fireproof material.

This material has excellent thermal insulation performance, fire resistance, and low water absorption, but due to its cost, it has no price advantage in the field of thermal insulation materials. At present, there is no insulated panel manufacturer that has widely promoted the use of panels in the field of building external insulation. According to the visual inspection samples, it can be inferred that such thermal insulation materials have poor dimensional stability and will cause cracking and water seepage of the surface when used in external thermal insulation projects.

6. phenolic board, thermal conductivity 0.032 W/(m · K)

insulation material 6

Phenolic board is a porous phenolic foam board, which is made from the condensation polymer of phenol and formaldehyde (phenolic resin) and other additives such as curing agent, foaming agent, surfactant and filler. Phenolic panels produced abroad have good thermal insulation properties, with a lower thermal conductivity than extruded polystyrene panels. In Japan, a large number of sandwich insulation systems use phenolic panels. However, promotion efforts are currently small in domestic china, production technology is relatively backward, and its thermal insulation performance is slightly worse than foreign products.

Domestic phenolic panels have weaknesses such as easy pulverization, low mechanical strength, brittleness, non-extensibility, and high-water-absorption. When used in thin plastering systems for external wall insulation, serious quality accidents such as surface cracking and peeling will occur. In view of this, there was a special expert meeting that do not recommend phenolic panels for use in external wall thermal insulation systems. Phenolic board is a thermosetting organic thermal insulation material similar to polyurethane board thermal insulation material. Its thermal insulation performance and flame-retardant performance are superior to extruded board and polystyrene board. Unfortunately, the current domestic technology still needs further progress, then it may be able to occupy a place in the field of thermal insulation in the future.

7. graphite polystyrene board, thermal conductivity 0.033 W/(m · K)

insulation material 7

Graphite polystyrene board is a type of expanded polystyrene board, a classic product of the chemical giant BASF Company. An infrared reflective agent is added to the polystyrene raw material, which can reflect thermal radiation and improve the thermal insulation performance of EPS by 30%. At the same time, the fireproof performance can easily achieve the leap from B2 to B1.

Graphite polystyrene board not only has excellent thermal conductivity performance comparable to domestic extruded boards, but also with a NEOPOR factor that has a thermal reflection function and flame retardant B1 grade causes it is superior to EPS and XPS boards which rely on the addition of flame retardants. Currently, this thermal insulation material has been listed in the national building materials standards, and is also the preferred thermal insulation material for passive rooms. It can be said that for residential buildings below 54 meters, public buildings below 50 meters, and curtain wall buildings below 24 meters, the thin plaster insulation system with this insulation material is a better solution.

Unfortunately, there are too many fake insulation materials on the market, and the pictures I put here are also fake products. The real NEOPOR board is produced from BASF raw materials, with uniform particle distribution and good appearance. Currently, only a few enterprises produce it, and most enterprises produce fake black EPS boards in order to reduce costs.

8. rubber plastic insulation material, thermal conductivity 0.034~0.041 W/(m · K)

insulation material 8

This material is no strange to everyone. Strictly speaking, this thermal insulation material cannot be referred to as external thermal insulation material because it is a flexible thermal insulation material, usually used on HVAC pipes. However, the insulation materials introduced to you this time are not limited to wall insulation, and materials from other fields have also been brought in.

According to the terms in GB17794-2008, flexible foam rubber and plastic thermal insulation products can be defined as flexible thermal insulation products with closed cell structure processed by mixing, extrusion, foaming, cooling and shaping, using natural or synthetic rubber and other organic polymer materials as the base material, adding various additives such as aging agents, flame retardants, stabilizers, curing accelerators, etc.

This thermal insulation material is widely used in the field of pipeline insulation, and can often be seen in most projects. It is not suitable for wall insulation systems with thin plaster finishes. Here we do not make too much evaluation, because pipe insulation is nothing more than using rubber and plastic, phenolic resin, glass wool, and other materials, which are not good for comparison with thermal insulation materials in the field of thin plastering of external walls

9. genuine gold plate (thermosetting modified polystyrene plate), thermal conductivity 0.036W/(m · K)

insulation material 9

In the first two years, there were many modified polystyrene boards on the market, achieving excellent fire and flame-retardant effects. However, only this kind of modified polystyrene board called “genuine gold board” is really a success. The emergence of this material has caused dissatisfaction with various competitive products.

The “genuine gold plate” is currently the most successful product of modified EPS that can be seen in China which is processed with the internationally advanced phase change wrapped thermal insulation energy storage technology, and has a continuous honeycomb structure of heat cutoff and barrier. After modification, the fire resistance reaches A2, so the foam particles themselves will not burn.

It is actually difficult for “genuine gold plates” to achieve true Class A fire resistance, and even if Class A performance is achieved, the cost is very high. From the material performance indicators and sample blocks, it can be seen that among the modified materials for EPS boards, “genuine gold boards” are indeed the best ones made. However, in the past two years, many manufacturers have followed the trend and embarked on the production line of this product, which make fierce competition and gradually declining quality in the market. Unfortunately, some regions hold prejudices against this type of material and restrict their promotion. Manufacturer has positioned this board as a Class B fireproof material, so those manufacturers who are still counterfeiting the so-called Class A fireproof material need not continue to struggle and return the truth to the market.

We believe that materials such as “genuine gold panels” and vacuum insulation panels are products developed by Chinese people who are facing the fire prevention problem of thermal insulation materials and have taken a new path. In China, the majority of high-rise buildings have excellent thermal insulation materials with excellent comprehensive performance, such as fire protection and thermal insulation performance. The strong building energy efficiency market drives people to innovate and research. There are inevitably many quality issues with this system, and both fire resistance and other performance needs to be continuously improved. There is still a long way to go in the research on fire prevention optimization of domestic thermal insulation materials.

10. expanded polystyrene board, thermal conductivity 0.039 W/(m · K)

insulation material 10

Its full name is expanded polystyrene board. It is a polystyrene foamed plastic sheet with closed cell structure, which is made from expandable polystyrene beads that are heated and pre-foamed before being heated and molded in a mold.

This is the most widely used thermal insulation material often applied in thin plastering systems, integrated thermal insulation and decoration systems, large mold built-in systems, and steel wire grid panel systems. This material, whether domestic or foreign, occupies a significant proportion in the thermal insulation system market, and it cannot be denied that it is the most mature product used in external wall thermal insulation systems, So that all newly born materials will use this as a reference for comparison.

11. rock wool board, thermal conductivity 0.040 W/(m · K)

insulation material 11

Rock wool board is a water repellent thermal insulation board made of natural rock as the main raw material, a mineral fiber made by high-temperature melting and centrifugal blowing, mixed with a certain proportion of adhesives and additives, and then pressed and cut.

Rock wool board insulation is the second most widely used insulation material in Europe after polystyrene insulation, mainly used in high-rise buildings with high fire protection requirements. In China, mineral wool board insulation has been widely used in the interior of dry hanging curtain walls, and the application of thin plaster system has just arisen. Rock wool board is a material with high water absorption. In hot summer and cold winter areas in China, due to heavy rainfall and high air humidity during the plum rain season, the rock wool board insulation system will become damp and reduce insulation performance. For areas with little rain in the north, rock wool board is an external thermal insulation application material with good fire resistance.

There is also a type of cotton product called slag wool. Rock wool and slag wool belong to the same category of mineral wool, and they have many similarities in production technology, fiber morphology, alkali resistance, thermal conductivity, and incombustibility. People usually call rock wool and slag wool as mineral wool, so it is easy to regard them as the same thing, and even consider that the color of slag wool is pure and white, which is "pure" than the gray green rock wool. This is a misconception. Although they all belong to mineral wool, there are also some differences that cannot be ignored. The main raw material of slag wool is generally blast furnace slag or other metallurgical slag, and its acidity coefficient performance index, heat resistance, and corrosion resistance are worse than rock wool, so it is not suitable for use in thin plastering external insulation systems. In this ranking, we did not take slag cotton out for evaluation, in order to avoid misleading everyone about using this material in the field of exterior wall energy conservation.

12. inorganic fiber sprayed thermal insulation material, thermal conductivity 0.040W/(m · K)

insulation material 12

Inorganic fiber spraying materials mainly consist of inorganic fibers and water-based adhesives. After mixing, they are sprayed through an air pressure pump, and mixed with atomized water to spray onto the substrate to be protected to form a coating. The coating can meet the requirements of sound absorption, thermal insulation, and fire protection. This material is light, non-toxic, odorless, sound absorbing, good weather resistance, efficient heat insulation, reliable fire resistance, and can achieve a high fire resistance limit protection of more than 5 hours. It is suitable for fire protection of buildings and tunnels, especially high-rise steel structures with high fire resistance requirements. It is also suitable for thermal insulation and sound absorption of buildings and thermal insulation and energy conservation of mechanical equipment.

If there is a material that can be sprayed like polyurethane, which can ensure that the material is continuous without heat bridges, while also having a good flame retardant and fireproof effect, how good it would be for dry hanging stone curtain walls! However, it is an inorganic material, and the difficulty of achieving both tensile strength and thermal insulation performance cannot be perfectly solved. If the outer wall is designed with a thickness of more than 10 centimeters, can this thermal insulation system still be achieved?

13. Aerogel, thermal conductivity 0.040 W/(m · K)

insulation material 13

I believe many people have not seen this insulation material. Aerosol is also a product system for on-site spraying construction. Its main component is magnesium oxide (MgO), an ideal high-temperature refractory material. The product does not contain any organic substances. It not only does not release any harmful gases, but also can adsorb carbon dioxide in the air, reduce the greenhouse effect of the atmosphere, and regulate the environment.

From the perspective of appearance, it is a white foaming material, similar to the construction process of polyurethane. However, polyurethane is rapidly solidified during spraying, while aerogel can flow. Assuming that a dry hanging curtain wall has been installed, you can spray into the gaps in the stone, and fill all the gaps in the curtain wall with it. This is a very magical thermal insulation material, which is very beneficial for the construction of existing dry hanging curtain wall buildings. You can spray paint construction without removing the stones. Unfortunately, the strength is not high, and there are risks associated with water absorption. This system is mainly used in the filling field of wooden partitions in North America. This kind of frame concrete structure wall in China does not have many advantages. It cannot be used as a bearing layer for the external decoration itself, but can only be used as a filler.

However, with the promotion of the application of this material, more people will understand it and use it. Any new material system has corresponding advantages, and there may be a market for it in the field of energy-saving renovation of existing buildings in China.

14. glass wool board, thermal conductivity 0.042W/(m · K)

insulation material 14

Glass wool is a material that fibers molten glass into a cotton like shape. Its chemical composition belongs to the glass category. It is an inorganic fiber with good molding, small bulk density, high thermal conductivity, thermal insulation, sound absorption, corrosion resistance, and stable chemical properties. Glass wool board is a plate-like product made of glass wool applied with a heat setting adhesive and having a certain rigidity.

There are significant differences between glass wool and rock wool. Rock wool products are mainly made of refined basalt, while glass wool is mainly made of glass. Glass wool has a lower unit weight and less slag ball content than rock wool. In terms of heat resistance temperature, the maximum use temperature of rock wool is about 600 degrees Celsius, while glass wool is only about 260 degrees Celsius. As glass wool is generally used for thermal insulation parts below 200 degrees Celsius, it is mostly used for thermal insulation of general buildings or low-temperature pipelines. Rock wool is generally used for thermal insulation parts with a temperature of 500 degrees Celsius, and is mostly used for thermal insulation of high-temperature thermal pipelines or electrical equipment. The acidity coefficient of rock wool board is ≥ 1.6, and the acidity coefficient of glass wool is ≤ 1.6. The higher the acidity coefficient, the greater the strength, high temperature resistance, durability, and other properties of the board. Currently, domestic standards control the acidity coefficient of cotton like materials used for external insulation to be ≥ 1.6, so glass wool is not suitable for direct use in external insulation systems with thin plastering.

15. composite magnesium aluminum silicate thermal insulation material, thermal conductivity 0.045W/(m · K)

insulation material 15

The composite magnesium aluminum silicate thermal insulation material uses inorganic materials such as palygorskite, sepiolite, bentonite, and ceramic fibers as the main raw materials. Based on the original magnesium silicate thermal insulation material, harmful substances such as rock wool are removed, and a variety of special composite materials are added. It is refined through scientific formulas and advanced processes. It has the advantages of non-combustible, environmental protection, and long service life.

There are not many applications of this type of product in the market because of its regional characteristics, many people may not necessarily have seen it. We has not seen any application cases of this type of product in specific projects, or even seen a physical sample, so we will not make a subjective evaluation on the quality of this product for the time being.

16. HX isolation type insulation board, thermal conductivity 0.045 W/(m · K)

insulation material 16

HX isolation type fireproof and thermal insulation board is a composite fireproof and thermal insulation board formed by using EPS polystyrene board as the main raw material, adopting special structural forms and technological measures, and embedding high-efficiency fireproof agent into the EPS board.

HX isolation fire insulation board is a thermal insulation material developed and produced by a china local company. This material will slot the EPS, then fill it with mortar, and finally coat the outer surface with mortar, which reaches the Class A non-combustible standard. The production process is more complex than EPS, and the cost also increases. The plate can overcome the defects caused by ignition during construction. Currently, due to the short service life of the completed case, it is impossible to know the quality issues during maintenance. Theoretically, there is a significant risk of cracking in the finish due to the intercalation of organic and inorganic materials into joints. The innovation of thermal insulation materials by Chinese people rarely occurs when a new formula product or invention patent is developed. This product, created from the perspective of product structure, does not have much novelty, but merely responds to the national thermal insulation and fire protection policy.

17. foam glass insulation board, thermal conductivity 0.045~0.062W/(m · K)

insulation material 17

Foam glass is a kind of material with quartz sand or glass powder as the main raw material, added with foaming agent, accelerator and other additives, after ultra-fine crushing and uniform mixing to form a batch, and after melting, foaming and annealing, it is filled with evenly closed pores. The foam glass insulation board is a closed cell foam glass insulation product.

My impression of this material is that it is too expensive. Processing this product through recycled glass is also considered a sustainable green building material. However, the melting glass processing and production of foam board itself is also a high energy consumption. Due to its relatively good thermal insulation performance and strength, it is widely used as a fireproof isolation belt for exterior walls and roofs. Compared with rock wool, foam glass does not absorb water, so it has a good advantage on the roof. At present, except for foam glass, we don’t think other materials are better for the roof insulation and fire isolation belt of high-rise buildings.

18. polystyrene particle thermal insulation mortar, thermal conductivity 0.058 W/(m · K)

Polystyrene particles are expanded polystyrene foam particles or polystyrene particles, which are expanded and foamed with expandable polystyrene resin as the basic raw material. Polyphenylene particle thermal insulation mortar is a slurry composed of mortar and polystyrene particles, and the content of polystyrene particles is not less than 80%.

insulation material 18

This is an external thermal insulation material vigorously promoted by a company in Beijing. It is also a material with earlier product standards in China, and has a wide range of applications in the south of China. However, the thermal insulation performance is somewhat poor, and it is not suitable for external thermal insulation projects with high energy-saving requirements. Water absorption is also high. Thermal insulation mortar materials all have a characteristic that their comprehensive performance varies with the allocation of materials. It is not a stable material system, since too many heat preservation particles are mixed, resulting in good heat preservation and poor strength. If there are fewer insulation particles, the insulation effect will disappear. It is difficult to have both thermal insulation and strength.

19. fiber reinforced composite insulation board, thermal conductivity 0.0630~0.07 W/(m · K)

insulation material 19

The main raw materials for fiber reinforced composite insulation boards are flame retardant foaming materials, adhesives, and various modifiers. They are made by using advanced production processes, using scientific proportions, through one-step compression molding on an assembly line, and then through steam curing and natural curing.

There are also called siliceous rock slabs on the market, and small weavers are also included in this category. Silicone board is made of modified magnesium oxychloride cementitious material, natural clay, kaolin, and surface treated expanded polystyrene particles as the main raw materials. It is mixed, stirred, foamed, and pressed with a composite alkali resistant mesh on the surface. After being cured at 40 to 65 ℃ in damp heat, it is naturally cured, cut, and other processes. From the appearance, this kind of plate is filled with polystyrene particles, and the outer surface is reinforced with glass fiber mesh cloth. Therefore, everyone will think that this type of plate-like material is the factory prefabrication of polystyrene particle thermal insulation mortar. In fact, there are differences. The composition materials are different, with better crack resistance and impact strength. Moreover, the thermal conductivity is more guaranteed than on-site polystyrene particle thermal insulation mortar. This product has good fire resistance, general thermal insulation effect, high strength, and is not easily broken.

20. foam cement board, thermal conductivity 0.065~0.070 W/(m · K)

insulation material 20

The lightweight foam cement board, also known as composite foam cement board, is made from cement, fly ash, silica fume, and other main raw materials through foaming, curing, cutting, and other processes. This is a relatively pure inorganic insulation board type.

Foamed cement board has poor thermal insulation performance and is not suitable for external thermal insulation projects with high energy-saving requirements. The sample piece gives the impression of being very fragile and constantly dropping debris in the hand. From the perspective of product appearance, I think this is a very low-end product. Now the competition for this product is fierce, and the quality of products cannot be guaranteed. Material selection should be cautious since this type of plate may collapse due to long-term weather resistance.

21. inorganic thermal insulation mortar prefabricated board, thermal conductivity 0.065~0.070 W/(m · K)

insulation material 21

Taking the expanded vitrified microbeads thermal insulation mortar as an example, it is a premix composed of expanded vitrified microbeads, inorganic cementing materials, additives, fillers, etc. The main material, expanded vitrified microbeads, is an inorganic particle material made of vitreous volcanic lava ore sand through expansion, vitrification, and other processes. The surface is vitrified and sealed, and is in an irregular spherical shape. The interior is a porous cavity structure.

22. expanded vitrified microbead thermal insulation mortar, thermal conductivity > 0.070 W/(m · K)

A thermal insulation series product called "expanded perlite" was popular in China some years ago, but due to its high-water-absorption and increasingly poor product quality, it has gradually been denied internationally. As a representative of inorganic thermal insulation mortar, expanded vitrified microbead thermal insulation mortar is prohibited in the foreign thermal insulation market, and is also synonymous with "the lowest end thermal insulation product" in the domestic market. The thermal insulation functions and product quality of the various thermal insulation products listed above are relatively easy to control, but this type of products mixed on site cannot be controlled by us because the quality of thermal insulation mortar prepared by different temperature environments, different regions, different mixing ratios, different workers, and different operating methods cannot be constant and uniform.

insulation material 22

We believe thermal insulation materials are only one factor of the thermal insulation system, studying energy-saving technical solutions for walls must consider the performance and adaptability of all components based a system perspective.

When evaluating the suitability of a thermal insulation material for a project, the following aspects should be considered:

(1) Thermal insulation performance: The lower the thermal conductivity of the material, the thinner it will be, then the cost will be lower. Higher the thermal conductivity is, the required thickness will be. Material with a thermal conductivity higher than 0.045 W/(m · K) will be impossible to use in buildings with high energy conservation requirements.

(2) Dimensional stability: Thermal insulation materials should have good dimensional stability, which is not prone to warpage and deformation.

(3) Water absorption performance.

(4) Quality reliability.

(5) Construction convenience:

Taking into account the different advantages of different materials, it is conducted:

(1) Best thermal insulation material: vacuum insulation board;

(2) Best thermal insulation and waterproof material: injected polyurethane;

(3) The most mature application and the highest market share: expanded polystyrene board;

(4) Best comprehensive cost material: graphite polystyrene board;

(5) Wide use and large share (ground, basement exterior wall, internal insulation): extruded panels;

(6) The most promising scientific and technological materials: aerogel thermal insulation materials;

(7) The most restricted material used: thermal insulation mortar;

(8) The most commonly used material for exterior wall fire insulation: rock wool board;

(9) The best material of fireproof isolation belt for roof: foam glass plate;

(10) Material to be restricted/eliminated by the market: foamed cement board;

There is no perfect insulation material in the world. All materials have their own advantages and disadvantage.

Welcome your comments to share.

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