ASTM C1535 - 05(2011)

    Standard Practice for Application of Exterior Insulation and Finish Systems Class PI

    Active Standard ASTM C1535 | Developed by Subcommittee: C11.05

    Book of Standards Volume: 04.01


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    Significance and Use

    This practice provides minimum requirements for the application of Class PI EIFS. The requirements for materials, mixtures, and details shall be contained in the project plans and specifications. See Guide E1825 for guidance.

    1. Scope

    1.1 This practice covers the minimum requirements and procedures for field or prefabricated application of Class PI Exterior Insulation and Finish Systems (EIFS). Class PI EIFS are systems applied over polyisocyanurate insulation board, in which the base coat ranges from not less than 1/16 in. (1.6 mm) to ¼ in. (6.4 mm) in dry thickness, depending upon the number of nonmetallic reinforcing mesh layers encapsulated in the base coat. The base coat is then covered with a finish coat of various thickness in a variety of textures and colors. The insulation board shall be applied over a substrate or over open framing.

    1.2 This practice does not cover Class PI EIFS with drainage. Consult the EIFS producer for information.

    1.3 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are approximate and are provided for information purposes only.

    1.4 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard.

    1.5 This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C11 Terminology Relating to Gypsum and Related Building Materials and Systems

    C79/C79M Specification for Gypsum Sheathing Board

    C150 Specification for Portland Cement

    C1063 Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster

    C1177/C1177M Specification for Glass Mat Gypsum Substrate for Use as Sheathing

    C1186 Specification for Flat Fiber-Cement Sheets

    C1278/C1278M Specification for Fiber-Reinforced Gypsum Panel

    C1280 Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing

    C1289 Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board

    C1325 Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units

    C1382 Test Method for Determining Tensile Adhesion Properties of Sealants When Used in Exterior Insulation and Finish Systems (EIFS) Joints

    C1472 Guide for Calculating Movement and Other Effects When Establishing Sealant Joint Width

    C1481 Guide for Use of Joint Sealants with Exterior Insulation and Finish Systems (EIFS)

    E1825 Guide for Evaluation of Exterior Building Wall Materials, Products, and Systems

    E2110 Terminology for Exterior Insulation and Finish Systems (EIFS)


    ICS Code

    ICS Number Code 29.035.10 (Paper and board insulating materials)

    UNSPSC Code

    UNSPSC Code 30150000(Exterior finishing materials)


    DOI: 10.1520/C1535-05R11

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