As it becomes more and more relevant to renovate existing buildings with energy efficiency as top priority towards a nearly Zero Energy Building (nZEB) stock, the need for new super-insulation materials to penetrate the construction market increases. A promising option is to incorporate vacuum insulation panels (VIPs) into an External Thermal Insulation Composite System (ETICS) - one of the most popular coating solutions used for insulating building walls. However, the widespread commercialization of VIP solutions for buildings still faces some uncertainties, such as regarding the long-term performance of the panels or the significance of the edge thermal bridging effects. In this context, studying onsite wall applications is of major importance in order to evaluate the actual performance of this innovative multilayer coating system under real exposure conditions.

In this paper, the thermal behaviour of an ETICS façade incorporating a VIP insulation is studied. The building being retrofitted is located in Warsaw, Poland. Measurements of temperature, absolute humidity and heat flux are presented and discussed. Data is simultaneously recorded for a VIP ETICS wall and an adjacent conventional polystyrene-based ETICS wall. The VIP edge thermal bridging effect is also analysed. The thermal transmittance of both walls is estimated based on the experimental measurements. Furthermore, a computational algorithm for determining the thermal transmittance coefficient of the existing and the retrofitted wall based on temperature measurements is proposed. Additionally, a periodic infrared thermographic inspection is carried out during the 24-month monitoring period to identify anomalies.

It was found that the VIP thermal resistance contribution is significantly higher than conventional expanded polystyrene-based solutions, even at the joint area between panels. No panels with vacuum loss or other anomalies were found during the monitoring period. The computational algorithm results based on the measurements were found to be accurate when compared with the predicted theoretical U-values.

随着以能源效率作为首要任务以实现接近零能耗建筑 (nZEB) 存量的现有建筑的翻新变得越来越重要，对渗透建筑市场的新型超级隔热材料的需求也在增加。一个有前景的选择是将真空绝热板 (VIP) 结合到外部绝热复合系统 (ETICS) 中——这是用于建筑墙壁绝热的最流行的涂层解决方案之一。然而，建筑 VIP 解决方案的广泛商业化仍面临一些不确定性，例如关于面板的长期性能或边缘热桥效应的重要性。在这种情况下，

在本文中，研究了包含 VIP 绝缘材料的 ETICS 外墙的热行为。正在改造的建筑物位于波兰华沙。介绍和讨论了温度、绝对湿度和热通量的测量。同时记录 VIP ETICS 墙和相邻的传统聚苯乙烯基 ETICS 墙的数据。还分析了 VIP 边缘热桥效应。两壁的热透射率是根据实验测量值估计的。此外，提出了一种基于温度测量确定现有墙体和改造后墙体热透射系数的计算算法。此外，在 24 个月的监测期内定期进行红外热成像检查，以识别异常情况。

发现 VIP 热阻贡献明显高于传统的基于发泡聚苯乙烯的解决方案，即使在面板之间的接缝区域也是如此。监测期间未发现真空损失或其他异常的面板。与预测的理论 U 值相比，发现基于测量的计算算法结果是准确的。