Drainage-type exterior insulation and finish systems have been the predominant type of EIFS wall cladding used on residential dwellings since the late '90s, when building codes began to incorporate a weather barrier and a means for drainage in wall assemblies.
Moisture entry has been found to occur in homes with all types of claddings. Regardless of the cladding type, it's often difficult to visually determine if a structure has been subject to moisture entry unless there is obvious damage or a known source. Structures can be intrusively investigated by removing sections of cladding to determine this; however, it can be costly and disruptive to the occupants.