Why Use St. Astier Natural Hydraulic Lime For Historic Restoration, Conservation, and New Build Projects ?
As late as 1940 many brick and stone buildings were constructed with lime and sand for mortar. Many times these limes were inadvertently hydraulic limes. The lime putty used may have had a hydraulic set because of impurities in the limestone when a limestone contained various degrees of reactive silica and was burned along with the pure calcium carbonate stone. Today it is unfortunate that many of these pre-1940 buildings have been repaired using Portland cement based mortars and stucco.
