Exterior Insulation and Finish Systems, "EIFS" is a type of cladding for exterior building walls. EIFS provides insulation, weatherproofing and aesthetics in an integrated, composite system. EIFS is sometimes called synthetic stucco. EIFS is usually installed onto the outside face of a building's wall structure at the construction site by plasterers using hand tools. EIFS can also be prefabricated as panels in a factory.

EIFS is a multi-layer product. It consists of a layer of insulation (which is attached to the wall using adhesives, mechanical anchors, or both), a reinforced coating system on the outside of the EIFS called the "Base Coat", and a colored, textured coating as the outermost surface called the "Finish".

EIFS was developed in Europe after World War II and was introduced to the North American market in the late 1960's. EIFS is now a very popular cladding, accounting for over 10% of the cladding used in some markets. EIFS, more commonly called synthetic stucco. The EIFS concept was introduced to the United States over 25 years ago. The preferred envelope for many commercial buildings, EIFS has also become the cladding of choice for many home builders and homeowners.

Several types of EIFS are available, including the traditional barrier type, as well as the newer drainage-type EIFS. Drainage-type EIFS have a built-in provision which permits water leaks to drain to the outside, while barrier-type EIFS rely on creating a continuous water barrier at the outside face of the wall assembly.

• EIFS can be used on almost all types of buildings, including:
  Accommodations: single and multi-family residences; hotels/motels; condos
  Commercial: offices; high-rise buildings; banks; shopping malls
  Government facilities: offices; military buildings
  Industrial: warehouses; factories
• EIFS has many features, including:
  Excellent insulation properties
  Outstanding aesthetic flexibility (color/texture/shape)
  Moderate cost
  Light weight

EIFS is available mostly through specialty construction product distributors. It is usually installed by contractors who have been trained by the EIFS manufacturer.