Many old residential communities face the problem of rapid indoor temperature rise in summer due to thin walls or aging insulation layers. In the past, the solution was to install expanded polystyrene boards (EPS) either on the inside or outside of the walls. However, this approach occupies indoor space and the construction process can be quite complicated. Aerogel thermal insulation coatings offer a new technological solution. The main ingredient of this coating is aerogel powder with nanopores, which has an extremely low thermal conductivity of around 0.018, effectively blocking the transfer of heat.
In actual renovation processes, after preparing the wall surfaces, this material is applied with a typical thickness ranging from a few millimeters, which can be adjusted according to the desired temperature. Although the coating is thin, it can significantly alter the thermal resistance of the wall. In summer, when the external walls are exposed to prolonged sunlight, heat can penetrate through the brick structure into the interior. Walls coated with aerogel material have an inner surface temperature that is noticeably lower than that of ordinary walls. According to practical measurements, this temperature difference can usually reach 3 to 5 degrees Celsius. This means that the load on the air conditioner will decrease, as the compressor doesn't need to run at high power for extended periods, leading to energy savings.
In addition to insulation, this coating also provides thermal retention in winter, reducing the loss of indoor heat to the outside. Its application method is similar to that of regular latex paint and does not require altering the existing structure of the house. For top-floor residents in high-rise buildings or homes with significant sun exposure, this is a cost-effective energy-saving retrofit. Moreover, the material is stable, has a long service life, is resistant to cracking or peeling, and meets current home decoration standards in terms of environmental protection, with no irritating odors emitted.