Get Jahn Certified.

Spend some time with us and you will hear our mantra: there are two elements required for long-lasting, maybe even forever, masonry repairs: Compatible Materials and Proper Installation.

Compatibility with the Substrate is at the heart of everything Cathedral Stone manufactures. You can trust that anything with the Cathedral Stone and Jahn names are completely compatible with masonry.

When it comes to Proper Installation, we produce demo videos and we host regular educational webinars, but our premier offering is our Jahn Certification course. This intensive, 3-day course focuses on techniques and best practices that will best prepare masons to properly install Jahn Mortars.

Jahn Certification classes are held throughout the year at our Headquarters in Hanover, Maryland and at our training location in New York City. Take a look at our schedule here.

We also offer onsite training in certain circumstances—email us at info@cathedralstone.com if you are interested in onsite training.