Our team of masons, chemists and preservation specialists has firsthand knowledge of restoration techniques and products. Cathedral Stone Products helps specifiers make the right choice the first time, which means better cost savings and restorations that last.

 Founder, Dennis Rude,  began his career as a mason with an apprenticeship for The Stonecutters and Carvers Association of North America in 1961. After serving four years in The Navy, he returned and was soon hired as a stonecutter for the Washington National Cathedral. By 1977 had become superintendent of The National Cathedral's Cathedral Stone Works, and one year later, became the owner. He renamed it Cathedral Stone Company and began working for local contractors, gaining valuable experience with extensive masonry restoration projects. During this time, Dennis witnessed many failures and problems on projects and began to pursue investigating the causes to find ways to prevent them in the future.

This endeavor lead him to Europe to study failures in some of the most restoration intensive areas of the world. He found that failures were studied in laboratories. Eventually, he made his way to the laboratories of Heinz Jahn in Holland. Jahn was internationally known for investigating problem areas of buildings, identifying causes of failure, and adjusting mortars to correct those failures. Dennis had found a mentor.

In 1982, Dennis began importing Jahns mortars to the United States through Cathedral Stone Products, and their friendship and shared goal of developing the longest-lasting mortars has continued for more than 25 years. Cathedral Stone Products now manufactures Jahn Mortars in The United States and is the only manufacturer and distributor of Jahn Mortars in the country. Dennis perpetuates this approach with all of his product lines and strives to develop and improve the quality of masonry materials.

Cathedral Stone's project list is both impressive and extensive, including Grand Central Station, the Statue of Liberty, The White House, the New York Stock Exchange and Yale University, among numerous other historical and non-historical buildings.

Cathedral Stone Products has grown but our mission remains the same, to lead the masonry restoration industry into the future with its one-of-a-kind testing laboratory, ongoing research and innovation, and by sharing their knowledge through their hands-on training program.