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EIFS, Synthetic Stucco

What is EIFS?
EIFS stands for Exterior Insulation and Finish Systems or Outsulation. The product is also called synthetic stucco, and refers to a multi-layered exterior finish that's been used in European stucco construction since shortly after World War II, when contractors found it to be a good repair choice for buildings damaged during the war. The majority of repairs to European buildings were to structures constructed of stone, concrete, brick, or other similar, durable materials.

EIFS can reduce air infiltration by as much as 52% compared to conventional stucco, standard brick or wood construction. EIFS adds to the "R-value" of a building (R-value is the measurement of the resistance to heat flow); the higher the R-value number the better the insulating value. Most EIFS use an installation board with an R-value, R-4.0 + R - 5.9 per inch. When the EIFS insulation board is combined with the standard wall equity insulation, it raises the R-value of the wall insulation from R-11 to R-18 or more.

The elegant look of EIFS resembles traditional stucco, but EIFS are far more versatile then masonry stucco because it comes in a limitless number of colors and a wide variety of design textures. Special accents or trim (keystones, arches, quoins and moldings) are just a few examples of the flexible design capabilities that are usually cost prohibitive using conventional stucco systems.

There are three layers to EIFS

* Inner Layer - Foam insulation board that's secured to the exterior wall surface, often with adhesive.

* Middle Layer - A polymer and cement base coat that's applied to the top of the insulation, then reinforced with glass fiber mesh.

* Exterior Layer - A textured finish coat.