Acrylic stucco can be successfully applied to ICF (Insulated Concrete Forms), but proper surface preparation is essential to ensure a durable and long-lasting finish. One of the most important steps before applying acrylic stucco is thoroughly rasping the ICF surface.
Rasping removes the smooth outer layer of the foam, creating a textured surface that improves adhesion for the stucco base coat. Without proper rasping, the stucco may not bond securely, leading to issues such as cracking or separation over time.
At Met Exteriors, we have years of hands-on experience applying acrylic stucco over ICF structures. We’ve seen firsthand how skipping proper preparation can lead to problems. When ICF is left exposed to sunlight for too long, UV rays can degrade the foam, weakening it and reducing its ability to hold the stucco system effectively.
To avoid these issues, it’s essential to rasp the ICF surface thoroughly and apply the stucco system promptly. This protects the foam and ensures the stucco adheres well, providing a strong, weather-resistant, and attractive finish that stands the test of time.
