By Michel Couvreux
Thanks to the hard work of a few, Natural Hydraulic Lime has become one of the materials of choice for restoration/preservation projects and natural building construction in the United States.
Suddenly realizing the great potential of NHLs in the US, and feeling the economic hardship abroad, several European manufacturers have begun to latch onto the path opened by Saint-Astier.
Unfortunately, all NHLs are not equal in performance and quality.
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