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Cite this document
A drainable exterior insulation and finish system (EIFS), which is lightweight and improves enclosure thermal performance at a relatively low cost, is a valid option for over-cladding existing underperforming façades. This article describes a process for evaluating the suitability of a drainable EIFS for over-cladding an existing façade and, if it is suitable, the steps for successful design and installation of drainable EIFS over-cladding. This article also describes steps for existing façade investigation, code validation, and the thermal improvement benefit of EIFS over-cladding; design, detailing, and specifying; and quality assurance/quality control (e.g., mock-ups and testing) before and during construction. The article will also touch on the important design considerations of fire resistivity, designing for drift and drainage, and missile impact resistance.
drainable exterior insulation and finish system (EIFS), EIFS over-cladding, EIFS retrofit, façade over-cladding, façade retrofit
Taylor, A. Judson
Simpson Gumpertz & Heger, Inc., Los Angeles, CA