Probably one of the most extensively tested exterior claddings is Exterior Insulation and Finish System or EIFS. (An acronym pronounced “eefs,” please don’t call it EFUS.)
The ways of defeating water have changed over the years but the core concepts that have always worked are still being used... along with a few new steps.
When a building leaks, the design, workmanship and material of the building envelope are all suspect. The exterior walls, roofing, windows, doors, balcony decks and below-grade waterproofing are all potential culprits. Oftentimes, however, a leak cannot be attributed to just one building envelope component.