1.1 本规范涵盖了拟用作屋檐或山谷或两者上的垫层的聚合物改性沥青板材料，以防止由于冰坝而导致的瓦、瓦或金属屋顶漏水。 1.2 这些垫底板具有通过移除保护板而暴露的粘性粘合层。顶面适合在外露屋顶施工期间进行作业。 1.3 目录: 部分 范围 1. 参考文件 2. 术语 3. 工艺、饰面和外观 4. 物理要求 5. 取样 6. 试验方法 7. 条件作用 7.1 厚 7.2 最大载荷和断裂伸长率 7.3 胶合板附着力 7.4 热稳定性 7.5 –29时的灵活性 °C[–20 华氏度] 7.6 抗撕裂性 7.7 水汽渗透性 7.8 能够密封指甲周围 （水压试验水头） 7.9 侧搭接缝防水完整性 （水压试验水头） 7.10 视察 8. 拒绝和重新审理 9 包装和包装标记 10 关键词 11 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.5 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。 1.6 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。

1.1 This specification covers polymer modified bituminous sheet materials intended for use as underlayment on roof eaves, or valleys, or both, to prevent leakage of shingle, tile, or metal roofs from water back-up due to ice dams. 1.2 These underlayment sheets have a sticky adhesive layer which is exposed by removal of a protective sheet. The top surface is suitable to work on during the application of the exposed roofing. 1.3 Table of Contents: Section Scope 1 Referenced Documents 2 Terminology 3 Workmanship, Finish, and Appearance 4 Physical Requirements 5 Sampling 6 Test Methods 7 Conditioning 7.1 Thickness 7.2 Maximum Load and Elongation at Break 7.3 Adhesion to Plywood 7.4 Thermal Stability 7.5 Flexibility at –29 °C [–20 °F] 7.6 Tear Resistance 7.7 Moisture Vapor Permeability 7.8 Capability to Seal Around Nail (Head of Water Test) 7.9 Waterproof Integrity of Side Lap Seam (Head of Water Test) 7.10 Inspection 8 Rejection and Rehearing 9 Packaging and Package Marking 10 Keywords 11 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 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. 1.6 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.