An impeccably preserved California gold rush town, the town of Columbia was first established in 1850, the same year that St. Astier began producing the NHL that we know and use today. This same NHL was recently used for the repointing and brick setting restoration work on the main buildings. View more information on this project.
Built between 1770 and 1794, the San Carlos Cathedral is the oldest stone building in California, still serving the Catholic community of the Monterey Peninsula today.
The sandstone and mud mortar walls, originally covered with a lime plaster very similar to our NHL 2, sustained minimal damage from past earthquakes while the lime plaster basically remained intact. Nevertheless, deemed an “unreinforced masonry building,” the cathedral needed seismic retrofitting, and the original lime plaster needed to be removed in the process. Upon completion, simple sand and NHL 2 mixes were used for repointing and replastering, vital elements that guarantee the building’s integrity for centuries to come.
This restoration was achieved with the expertise of specialized engineers and architects in collaboration with the Getty Conservation Institute.
Visit the San Carlos Cathedral website for more information.
Ongoing restoration and maintenance with NHL plasters on adobe after failure of cement based repairs. View more information on this project.
Mission San Juan Capistrano was founded in 1776. After a long period of gradual decline and damages caused by earthquakes, restoration efforts began with the arrival of Father O’Sullivan in 1910. Alas, the use of improper modern materials such as Portland cement-based mortars, concrete and renders created new challenges until it had become evident that lime was the only appropriate and compatible material. The closing of the last Natural Hydraulic Lime producer in the United States, led engineers and contractors to discover the fundamental qualities of Saint Astier® Natural Hydraulic Limes. Since then they have been extensively used in renders, masonry and in structural work. More information on Mission San Juan Capistrano.
Repointing with NHL and brown stone repair with Lithomex.
Restoration of the church dome in Tumacacori National Historic Park, Arizona. Originally built with adobe in 1821, the dome was badly damaged mainly due to the use of improper modern materials for maintenance and past restoration. Layers of impervious materials such as cement, acrylics, waterproofing, etc. were removed, revealing the original adobe structure. The dome was then covered with a minimum of five layers of NHL 5 and NHL 3.5, recreating the original dome with adequate protection.