Getting foam board for stucco right the first time

Using foam board for stucco is one of those construction choices that seems simple on the surface but actually carries a lot of weight for the long-term health of your home. If you've ever looked at a modern house and wondered why the walls look so perfectly smooth and why the energy bills are surprisingly low, there's a good chance there's a layer of expanded polystyrene (EPS) hiding under that finish. It's the core of what pros call EIFS—Exterior Insulation and Finish Systems—and it has totally changed the way we think about traditional masonry. ...

May 5, 2026 · 7 min · Flickenger Alon