Across various regions, energy-saving renovation projects for existing residential buildings are being continuously promoted. Upgrading exterior wall insulation is a core component of these renovations, and flame-retardant extruded polystyrene (XPS) board thin-plaster exterior wall insulation systems have been implemented in numerous renovation projects for older residential communities. Older buildings generally lack adequate insulation structures, resulting in rapid heat loss through the walls, leading to cold indoor temperatures in winter and scorching heat in summer, resulting in high air conditioning and heating costs for residents. After adding an XPS board insulation layer to the exterior walls, heat transfer is effectively blocked, significantly reducing indoor temperature fluctuations. Actual measurements show a significant increase in indoor winter temperatures and a substantial reduction in summer cooling energy consumption after the renovation.

XPS boards have a low thermal conductivity, requiring a thinner board thickness for the same insulation effect, making them ideal for older residential communities with limited exterior wall space. The lightweight nature of the boards reduces the overall load on the exterior wall system and is compatible with existing old wall bases. Through standardized bonding, anchor reinforcement, and protective plastering, they can effectively resist wind and rain erosion, improving the durability of the exterior walls. Furthermore, XPS boards can be combined with various exterior wall finishes, simultaneously optimizing the building's facade appearance after renovation, achieving both energy conservation and improved community aesthetics. The construction team explained that the renovation project was affected by residents' daily lives, requiring a balance between construction efficiency and safety. Extruded polystyrene (XPS) boards are easy to process on-site, allowing for a controllable construction period and minimizing disruption to residents. Driven by the large-scale urban renewal market, the XPS exterior wall insulation system is continuously optimizing its supporting construction techniques, contributing to the energy-saving upgrade of urban and rural residential buildings.