Exterior insulation and finish system (EIFS) is a general class of non-load bearing building cladding systems that provides exterior walls with an insulated, water-resistant, finished surface in an integrated composite material system. In Europe, systems similar to EIFS are known as External Wall Insulation System (EWIS) and External Thermal Insulation Cladding System (ETICS).

EIFS has been in use since the 1960s in North America and was first on masonry buildings. Since the 1990s, the majority of wood-framed buildings have used EIFS. The recommended system now includes a drainage plane to let water drain down and out from behind the cladding; this is in response to historical water infiltration problems that caused damage to buildings and resulted in costly legal cases.