With the continuous enhancement of people's awareness of energy conservation and environmental protection and the continuous pursuit of house comfort, roof insulation has gradually been paid attention to. Aerogel felt, as a new and excellent thermal insulation material, has gradually attracted people's attention. The application of aerogel felt to roof insulation is a problem that people discuss.
Aerogel felt is made of aerogel as a base material, and glass fiber, ceramic fiber and other materials. The excellent thermal insulation performance of aerogel felt is mainly attributed to the nanoscale three-dimensional porous structure of aerogel. In porous structures, there is a lot of air between the pores, and air is a poor conductor of heat. When heat is transferred, heat is scattered, reflected, and absorbed through the air inside the aerogel, reducing the path and efficiency of heat conduction. Therefore, the porous structure of the aerogel can effectively prevent the conduction of heat and achieve good thermal insulation effect.
In addition, the nanoscale pores of aerogel are very small in size, usually between 10-100 nanometers. This size is much smaller than the average free path of free movement of air molecules, so air molecules will collide many times in the nanoscale pores, increasing the path and time of heat transfer. At the same time, the nanoscale pores also limit the convective heat transfer, which makes the aerogel show lower thermal conductivity.

Therefore, the aerogel felt installed inside or outside the roof can effectively prevent heat conduction, thereby reducing the temperature difference between indoor and outdoor; It can effectively reduce energy consumption for heating in winter and cooling in summer, reduce energy expenses, and reduce greenhouse gas emissions such as carbon dioxide.
In addition to the energy saving effect, aerogel felt has other important advantages in roof insulation. First, the flexibility and compressibility of aerogel felt allows it to adapt to roof surfaces of different shapes and curvatures, ensuring complete coverage and providing lasting insulation. Secondly, aerogel felt has excellent waterproof performance, can resist the erosion of daily rain and humidity, and maintain long-term thermal insulation effect. In addition, aerogel felt also has good flame retardant properties, improving the fire safety of the house.
In summary, aerogel felt has excellent thermal insulation performance and energy saving effect in roof insulation. Its low thermal conductivity, ultra-low density, flexible compressibility and fire resistance make it an ideal thermal insulation material.