ASTM D2178/D2178M is the ASTM standard for asphalt glass felt used in roofing and waterproofing, providing a clear reference for product requirements and performance expectations. It helps buyers, specifiers, and manufacturers identify materials intended for membrane and sheet applications where consistency and reliability matter. By defining the technical basis for this type of felt, the standard supports more confident product selection, evaluation, and procurement in roofing and waterproofing work.

Purpose of ASTM D2178/D2178M

The purpose of ASTM D2178/D2178M is to establish a specification for asphalt glass felt used in roofing and waterproofing applications. As a product standard, it gives a common technical framework for describing the material and its expected characteristics. This is useful when comparing products, reviewing submittals, or checking whether a material is suitable for a specified roofing or waterproofing system. ASTM D2178/D2178M helps keep requirements consistent across manufacturers and projects.

Common use cases of ASTM D2178/D2178M

This standard is commonly referenced when asphalt glass felt is selected for roofing or waterproofing assemblies. It is relevant to product specification, material procurement, and quality review for felt intended to work as part of a broader membrane or sheet system. ASTM D2178/D2178M is also useful during submittal review and acceptance testing, where the material must be matched to project requirements and documented as meeting the applicable specification.

Why ASTM D2178/D2178M matters

ASTM D2178/D2178M matters because it supports consistent product evaluation and helps reduce uncertainty when selecting asphalt glass felt for critical building-envelope applications. A clear specification can improve communication between suppliers, contractors, and specifiers, while also supporting compliance review and quality control. In practice, using ASTM D2178/D2178M can help limit procurement errors, improve comparability between products, and provide a stronger basis for verifying that the material fits the intended roofing or waterproofing use.

• Asphalt glass felt specification
• Roofing and waterproofing applications
• Material selection and procurement
• Product evaluation and compliance review