?
I used to have a stucco house that was built in 1907. The house was painted only twice in 90 years. Stucco never leaked, moved, anything - this was in the midwest. Stuff was thick though ! People telling you that there is no way to build a stucco house that won't leak, are full of shit. WHY would any house ever been built from stucco if that was the case ?
I don't understand why this hasn't moved on to a legal stage, whether arbitration or lawsuit.
Is the stucco company a contractor to you, or a sub to the company you paid to build the house ? If you didn't contract directly then wouldn't you go after the primary contractor (builder) ?