Thermal Insulation Layer Thickness of Prefabricated Houses
The thickness of the thermal insulation layer of prefabricated houses needs to be determined according to specific circumstances, and there are differences in different building types and regions.
In prefabricated buildings, prefabricated concrete sandwich insulation wall panels are a common structural form, with a total thickness usually ranging from 300 to 400 mm. This type of wall panel integrates the insulation layer within the concrete structure, forming an integrated insulation structure. The total thickness includes the structural layer and the insulation layer. The specific thickness of the insulation layer is determined based on factors such as the building's energy-saving requirements, local climate conditions, and the performance of the selected insulation materials. For example, in regions with high energy-saving standards or buildings with strict insulation performance requirements, the thickness of the insulation layer may approach the upper limit of the total thickness range; whereas in regions with relatively lower energy-saving requirements or milder climates, the thickness of the insulation layer may be smaller.
For self-built prefabricated houses in rural areas, the choice of insulation layer thickness is closely related to the regional climate. In northern cold regions, where winter temperatures are low, to effectively prevent indoor heat loss, if EPS polystyrene boards are used for exterior wall insulation, their thickness is generally 80 to 100 mm. EPS polystyrene boards have good insulation performance and a low thermal conductivity coefficient, meeting the insulation needs of buildings in cold regions. In southern hot-summer and cold-winter regions, where summers are hot and winters are relatively cold, if XPS extruded polystyrene boards are used for exterior wall insulation, their thickness is usually 50 to 80 mm. XPS extruded polystyrene boards have higher strength and better waterproof performance, and their insulation effect is also excellent. Within this thickness range, they can adapt to the climate characteristics of southern regions, reducing the transmission of outdoor heat into the interior in summer and maintaining indoor temperature in winter.
In addition, apart from regional climate and building type, the performance of insulation materials also affects the thickness of the insulation layer. Different insulation materials have different thermal conductivity coefficients; the lower the thermal conductivity coefficient, the better the insulation performance, and the thinner the required thickness to achieve the same insulation effect. Therefore, when selecting insulation materials and determining the thickness of the insulation layer, multiple factors need to be considered comprehensively to ensure that prefabricated houses have good insulation performance and energy-saving effects.
