Exterior Insulation Finish System (EIFS) is a multi-layered finish that has been used on commercial buildings and residential houses in the United States for over 30 years.

There are 3 layers to EIFS:

• The Inner, Middle and Exterior layers
• The Inner layer is made up of Expanded Polystyrene (EPS)

EPS for the EIFS system is a polystyrene board with a thickness that ranges from 3/4' - 4' typically. The weight of the board is 1lb density and comes bundled accordingly to achieve a certain square footage.

The EPS for EIFS is also available in a drainage board. The drainage board has grooves cut into the back of the board which creates a drainage cavity between the supporting wall and the foam to prevent water damage.

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