A Method for Wind-Driven Rainwater Infiltration Climate Risk Assessment Based on Building Thermal Design Zoning

Wind-driven rain is the main external factor causing rainwater infiltration in exterior walls， and there are significant differences in wind-driven rain climate conditions in various regions of China. This study proposes a method for assessing wind-driven rainwater infiltration climate risk that integrates building thermal design zoning， along with a set of corresponding indicators. The risk level of wind-driven rainwater infiltration in the main towns of existing building thermal design zoning was evaluated using these indicators， and a climate zone map for wind-driven rainwater infiltration risk in China was developed. The results show that the severe cold and cold regions are predominantly low-risk， accounting for 80.2% and 95.3%， respectively， with no high-risk towns observed in either region. In contrast， the hot summer and cold winter， hot summer and warm winter， and mild regions exhibit the highest proportions of medium-risk areas， at 68.2%， 66.7%， and 59.1%， respectively. Among these， the hot summer and warm winter region is particularly significant， with a high-risk proportion reaching 25%. These findings emphasize that even if thermal design standards are consistent， differences in waterproofing design requirements for buildings in different regions should also be fully considered.