Proven European Process Brought to the States

As an engineer in Holland and Germany, Heinz Jahn has gained vast experience in investigating masonry building problems. In 1977, he produced his first restoration mortar based on finding a compatible mortar through the testing of the building substrate. By testing to establish the masonry’s physical properties, he was able to develop a repair mortar that was truly compatible with the substrate, ensuring long-lasting repairs.

Dennis Rude, the founder of Cathedral Stone® Products, sought the mentorship of Heinz Jahn in 1982, in his goal to provide specifiers and other restoration professionals the time-tested solutions and technologically advanced materials that would allow them to restore buildings the right way the first time. Cathedral Stone Products began importing Jahn Mortars that same year.

Jahn Mortars stand alone as the most carefully developed products available, and they are continuously tested and monitored to ensure their success. Jahn produces exclusive masonry repair mortars that are breathable enough to allow trapped moisture and salts to migrate through the repairs. By allowing salts and water to escape, the failures caused by high Portland cement mixes and the use of acrylic latex bonding agents have been eliminated.

Because every job is unique, Cathedral Stone Products tests the original masonry in its lab to define the physical properties of the mortar. This allows Cathedral Stone to discover potential problems and then adapt the mortars to address likely problems (such as high salt amounts, expansion/contraction rates, permeability, and compressive strength). Through project-specific testing and continuing research in the field, Jahn Mortars is the only product line on the market that can protect buildings for 50-plus years.

Please contact us to discuss your specific project or to arrange testing by calling 800.684.0901 or email info@cathedralstone.com.