Stucco Damage is Water Damage
Stucco is a concrete material that is used both a residential and commercial exterior wall. There are lots of stories about "stucco problems" which are really water problems. There seem to be more water problems with stucco construction than with brick, stone or wood exteriors, but the problems are not from the concrete veneer that is stucco. The problems are that water gets behind the stucco and too frequently, because of the poor workmanship with stucco, water damage happens in stucco houses and buildings.
In reality, stucco is very resiliant to water penetration from the outside. That same quality also helps to trap moisture inside stucco walls. That is why it is critical for stucco to have the ability to "weep". "Weeping" just means that the walls allow water to escape out at the bottom.
In a brick or stone home, you may have seen small slits at the bottom level of brick. Those are called "weep holes". With a stucco exterior, there is no "weep hole" so the "weeping" has to be done from the bottom. "Weep Screeds" are metal extensions that extend out beyond the bottom of the stucco and help water exit from behind the stucco. "Weep screeds" are now universally required by municipal building codes but that has only been in the last ten years or less. Older home frequently were built with no weep screeds and no weeping ability. Consequently, stucco homes frequently have wood rot and wood damage behind the stucco walls.
That wood damage and wood rot behind the stucco walls is not visible and often the only way to know it is there is to pull the stucco exterior off.
If you are buying a stucco home or stucco building, you may want to hire a stucco contractor or water damage expert to evaluate if their is wood rot and wood damage behind the stucco.