The basic EIFS wall system is a barrier type cladding that consists of foam insulation either adhesively or mechanically attached directly to the exterior substrate (typically wood or gypsum in residential construction). The insulation can be expanded, extruded or polyiso-cyanurate type. The insulation is covered with a lamina, which consists of either a cementitious or non-cementitious stucco base coat, embedded fiberglass reinforcing mesh and synthetic finish coat.