1.1 该测试方法涵盖了通常现场应用于隔热材料的饰面的户外暴露测试，可能包括接缝或接缝密封剂，或两者兼而有之。当饰面暴露在外部天气条件下时，在确定某些物理特性之前，这种暴露是必不可少的。该测试方法还指出了接缝密封剂和饰面之间可能存在的兼容性问题，以及饰面跨越干接缝的能力。本试验方法不用于评估防霉性、风化性或耐化学性。 注1: 有关免费塑料薄膜的测试，请参阅实践 D1435 。 1.2 本试验方法未规定应用方法、试验持续时间或检查间隔。 1.3 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 物理和化学变化都可能因天气暴露而发生，这些变化会影响性能、使用寿命和维护计划。 因此，与性能相关的性能测试应在特定户外暴露时间前后进行。 5.2 该试验方法认识到，不同的地理位置、环境条件、表面温度和环境温度之间的差异以及试验持续时间对试验结果的影响极其不同。 5.3 本试验方法用于比较定性试验。

1.1 This test method covers out-of-doors exposure testing of finishes that are normally field-applied to thermal insulation and possibly include joints or joint sealants, or both. Such exposure is essential prior to the determination of certain physical properties when the finish is to be exposed to exterior weather conditions. This test method also indicates possible compatibility problems between the joint sealant and the finish as well as the ability of the finish to span a dry joint. This test method is not intended to evaluate mildew resistance, efflorescence, or chemical resistance. Note 1: For testing free plastic films, see Practice D1435 . 1.2 This test method does not prescribe the method of application, test duration, or inspection intervals. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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. 1.5 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 Both physical and chemical changes possibly occur from weather exposure, and these changes affect performance properties, service life, and maintenance schedules. For this reason, tests of properties relating to performance shall be made both before and after specific periods of outdoor exposure. 5.2 This test method recognizes that differing geographical locations, environmental conditions, differences between surface temperatures and ambient temperatures, and test durations have extremely varied effects upon the test results. 5.3 This test method is to be used for comparative qualitative testing.