عملکرد حرارتی انتخابی از مواد عایق مناسب برای ساختمان های تاریخی

The brick wall with lime plaster (c.840 mm) has a higher U-value of 1.32 W/m2K than expected. All the internal insulations were found to reduce the U-value of the wall (between 34 and 61%) with the exception of a thermal paint which had no effect. The thermal imaging survey corroborated the U-value results, and insulations with low wall U-values also had high wall surface temperatures. Internal wall temperatures showed a similar trend; a reduced temperature at the wall/insulation interface for low thermal conductivity insulations. Lastly, the in-situ insulations underperformed when compared to their manufacturer's specified properties (wall U-value higher by 13–25% with the exception of cork lime). This is attributed to real in-situ environments compared to ideal testing laboratory conditions.