What is the required standard for mortar for Adhered Masonry Veneer?

The required standard for mortar for Adhered Masonry Veneer is ASTM C270 Type S. This specification outlines the requirements for mortar used in construction with masonry units, including both strength and durability characteristics. Type S mortar is for use in structural applications, ensuring adequate bonding as well as a sufficient level of tensile strength, which is essential for adhered masonry veneers that are subject to various loads and environmental conditions.

When applied to adhered masonry veneer, this type of mortar provides the necessary properties to resist cracking and maintain adhesion over time, especially where there may be moisture exposure. The use of ASTM C270 Type S mortar ensures that the veneer properly adheres to the substrate and withstands the stresses imposed by weather and thermal changes.

The other options refer to different standards that do not specifically address the requirements and properties necessary for the mortar used in adhered masonry veneer applications.