Notice: Effective April 1, 2015, Cathedral Stone Products will be implementing an overall increase in prices. READ MORE

Doing It Right The First Time

The Cathedral Stone Difference

Restoring it Right. The First Time. Cathedral Stone Products began doing it the "right way" thirty-three years ago when they began importing Jahn Restoration Mortars from Holland. Dennis Rude, founder of Cathedral Stone Company in 1977, began studying better masonry restoration with Heinz Jahn to learn why masonry restoration failed so often in his experience. Approaching restoration scientifically, by testing the substrate for physical properties and developing repair materials that match those properties, Jahn was able to eliminate the possibility of failure. (read more)

These mortars are manufactured and tested in the United States, with an on-site laboratory for quality control testing, and for the development of other State of the Art products such as:

Acid Free Paint Strippers

Revolutionary Water Repellents

Laboratory Tested and Manufactured Mortars

And Potassium Silicate Coatings

Want to learn the story of how we engineered our advances? Click Here.


Watch: How Salts Effect Masonry

Dennis Rude, Founder of Cathedral Stone Products, gives an impromptu lesson in CSP's lab on how salts effect masonry, the importance of using proper mortars and products on stone that are breathable and why salt testing is a must for compatibility resulting in lasting repairs.


Scientific Breakthroughs in Masonry Restoration Seminar

We will be holding a Scientific Breakthroughs in Masonry Restoration Seminar and Repair Workshop on March 25th 2015 at our facility in Hanover, MD.  Hurry and register soon as only the first 25 participants to enroll will be eligible for the Open House.  Cost will be $25 for the day which will include lunch and AIA credits.  For more details please contact the front desk.


Architects & Contractors

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