The outdoor seasonal weather conditions can influence the insulation performance of extensive green roof. In addition, the thermal behavior of extensive green roof can be affected by the thickness of its layers including substrate and drainage layer. On the other hand, the replacement of polyethylene modular panel with porous aggregates as drainage layer can affect the water retention capacity of green roof. Therefore, in this study, the green roofs with pozzolana (porous volcanic gravel) as drainage layer under constant and variable inside temperatures were modeled and subjected to the weather conditions of winter and summer to assess the humidity and temperature variations in the depth of the systems. The results showed that there was a decrease in temperature through the depth of the green roof system for the winter period, while the reverse occurred for the relative humidity. During the winter period, the green roof model with the 10-cm substrate and 8-cm pozzolana was recommended to be used. However, the model with the 8-cm substrate and 6-cm drainage layer had the best insulation performance, particularly for the summer period. Moreover, the internal ceiling temperature fluctuation of system under variable inside temperature was higher than that under constant inside temperature.

室外的季节性天气条件会影响广泛的绿色屋顶的隔热性能。另外，大面积屋顶的热性能会受到其包括基底和排水层在内的各层厚度的影响。另一方面，用多孔骨料代替聚乙烯模块板作为排水层会影响屋顶绿化的保水能力。因此，在本研究中，对在恒定和可变内部温度下以火山灰（多孔火山砾）作为排水层的绿色屋顶进行建模，并使其在冬季和夏季的天气条件下进行评估，以评估系统深度的湿度和温度变化。 。结果表明，冬季整个屋顶绿化系统的温度都在下降，而相对湿度则相反。在冬季，建议使用带有10厘米基底和8厘米火山灰的绿色屋顶模型。但是，具有8厘米基底和6厘米排水层的模型具有最佳的隔热性能，尤其是在夏季。此外，在内部温度可变的情况下，系统的内部天花板温度波动要大于在恒定内部温度下的内部天花板温度波动。