ASTM C126 is the ASTM standard for ceramic glazed structural clay facing tile, facing brick, and solid masonry units. It provides a technical basis for identifying and specifying these glazed clay products so they can be evaluated consistently for building use. By defining the relevant requirements for this product category, the standard helps manufacturers, specifiers, and purchasers communicate clearly and support reliable material selection, quality control, and compliance review.

Overview of ASTM C126

The official ASTM C126 standard title identifies a specification for ceramic glazed structural clay facing tile, facing brick, and solid masonry units. In practical terms, it serves as a product standard for glazed clay masonry-facing materials, helping establish a common framework for description and acceptance. ASTM C126 is most useful when a project needs a clear reference for these units and their expected characteristics, especially during procurement, submittal review, and specification writing.

Common use cases of ASTM C126

ASTM C126 is commonly used when selecting or specifying glazed structural clay products for wall surfaces and similar masonry applications. It is relevant to facing tile, facing brick, and solid masonry units where appearance, consistency, and material identification matter. The standard may also support supplier documentation, purchasing decisions, and project specifications that call for a defined glazed clay masonry product. ASTM C126 is often referenced in workflows where product conformity and clear technical communication are important.

Benefits of using ASTM C126

Using ASTM C126 helps align buyers and suppliers around a shared product specification, which can reduce ambiguity in procurement and project documentation. It supports more consistent evaluation of glazed clay facing materials and can aid quality control by giving teams a recognized technical reference. For specifiers, the standard provides a clearer basis for compliance checks and product comparison. ASTM C126 also helps reduce risk by improving consistency in how these masonry units are described and reviewed.

• Specification for glazed clay facing products
• Supports material identification and review
• Useful for procurement and submittals
• Helps promote consistent product evaluation
• Applies to facing tile, facing brick, and solid units