Originally Posted by
Martin lehman
I see foam trim/bands on stucco exteriors out here all the time.
Typically, with foam trim, the stucco is applied first, then the foam trim is applied, thus, stucco over foam trim (even the horizontal surfaces) is not a problem. Any water which seeps between the foam trim and the stucco will eventually either: a) seep out the bottom of the foam trim/stucco joint, or, b) seep into the stucco to the drainage plane, which is intended to drain down behind the stucco anyway.