Carmela I assume my reply comes, unfortunately, too late - but just in case you still want to know more , here are some excerpts from a full webpage on stucco on my website at http://www.stucco-as-art.com
Real stucco consists only of natural ingredients (lime, sand, cement and pigments). Real stucco is like a natural skin for the wall, which can "breathe" through it: because it is porous and not waterproof, even if it absorbs moisture, real stucco dries easily, without damage to the structure. Because of its ingredients, real stucco is fire retardant. And best of all, real stucco is abrasion-resistant and very difficult to damage.
And in case the stucco work is already completed on your house, if it has been done properly, you shouldn't worry, real stucco is one of the best finishes ever! Catalino