ASTM D8257
This standard establishes expectations for synthetic underlayment performance and durability. It has many test requirements that are unprecedented for underlayment standards, including fastener pull-through, ultraviolet resistance and hydrostatic resistance.
To illustrate the benefits of synthetic products tested and approved in accordance with ASTM D8257, the figure compares the differences among various felt-based ASTM standards, ICC-ES acceptance criteria and ASTM D8257.
