Stone has a long history of being the preferred building material for the privileged and elite, but with today’s processing techniques stone is far more affordable and a smart choice for homeowners and renovators.
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.
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