Answer
Sometimes stucco or brick can begin to have problems with water getting in cracks and crevises. This can be fixed with elastrometric paint, which involves a primer and two special coats for a durable barrier between the weather and the surface which can bend if the wall expands or contracts instead of cracking. This may cost slightly more, but the durability and look will stay for much longer, meaning it is usually the best choice for these types of surfaces.