1.1 本规程描述了如何使用测试方法 E96/E96M 确定EIFS样品的水蒸汽传输（WVT）特性。 1.2 外墙保温和饰面系统（EIFS）是一种由多个层组成的多层建筑外墙材料。就本标准而言，这些层，无论是单层中的单个EIFS组件材料，还是EIFS组件材料组，都被称为“EIFS样本” 1.3 试验方法附录X1.1.2和X1.1.5中所述的水法、程序B和D E96/E96M 应在本实践中使用。 1.4 本规程仅限于不超过1的试样 1. / 4. 在里面（32 mm）厚，本实施规程第9节规定的除外。 1.5 以英寸-磅为单位的数值应视为标准值。水蒸气透过率、渗透性和渗透性的公制英寸-磅转换系数如试验方法表1所示 E96/E96M . 所有毫米汞柱到Pa的转换都是在0的温度下进行的 °C。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验的目的是获得通过EIFS样品的水蒸汽传输的稳态值。EIF的这一特性通常是监管机构和设计机构要求的，并用于建筑墙体的热湿研究。 EIFS允许水蒸汽通过的程度可能会影响EIFS壁组件的性能。 5.2 在一组测试条件下获得的磁导率值并不表示在不同条件下的值。因此，选择的测试条件最接近EIFS组件和组件的使用条件。 5.3 本标准不应单独用作评估给定EIFS墙体组件水蒸汽传输特性的唯一方法。其他方法可用，应酌情考虑和使用。 5.4 为了有助于评估给定EIFS墙体组件的热湿条件，本标准中使用的样本应紧密代表给定建筑上实际存在或将存在的材料。

1.1 This practice describes how to use Test Methods E96/E96M to determine the water vapor transmission (WVT) characteristics of an EIFS sample. 1.2 An Exterior Insulation and Finish System (EIFS) is a multilayer exterior building wall material that consists of a number of layers. For the purpose of this standard, these layers, whether they be individual EIFS component materials in single layers, or groups of EIFS component materials, are called the “EIFS sample.” 1.3 The Water Method, Procedures B and D described in X1.1.2 and X1.1.5 of Appendix X1 of Test Methods E96/E96M shall be used in this practice. 1.4 This practice is limited to specimens not over 1 1 / 4 in. (32 mm) in thickness, except as provided in Section 9 of this practice. 1.5 The values stated in inch-pound units are to be regarded as the standard. Metric inch-pound conversion factors for water vapor transmission, permeance, and permeability are stated in Table 1 of Test Methods E96/E96M . All conversions of mm Hg to Pa are made at a temperature of 0 °C. 1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The purpose of this test is to obtain steady state values of water vapor transfer through the EIFS sample. This characteristic of EIFS is commonly requested by regulatory and design organizations, and is used in thermal and moisture studies of building walls. The degree to which an EIFS allows water vapor to pass through it can affect the performance of an EIFS wall assembly. 5.2 A permeance value obtained under one set of test conditions does not indicate the value under a different set of conditions. For this reason, the test conditions selected are those that most closely approach the conditions of use for EIFS components and assemblies. 5.3 This standard should not be used alone as the sole means for evaluating the water vapor transmission characteristics of a given EIFS wall assembly. Other methods are available, and should be considered and used as appropriate. 5.4 To be meaningful in evaluating the thermal and moisture condition of a given EIFS wall assembly, the specimens used in this standard should represent closely the materials that actually exist, or will exist, on a given building.