1. ASTM C406-06 – Standard Specification for Roofing Slate
The American Society for Testing & Materials (ASTM - see www.astm.org) was formed in 1898 but these days ASTM standards are truly international.
Read More1. ASTM C406-06 – Standard Specification for Roofing Slate
The American Society for Testing & Materials (ASTM - see www.astm.org) was formed in 1898 but these days ASTM standards are truly international.
Read More