The three-day Jahn Restoration Training Workshops introduces traditional methods of masonry repair using Jahn Restoration Mortars. This includes the repair of limestone, sandstone, terra cotta and brick, these workshops are hands-on and introduce techniques to take masons to the next level. Successful completion of the Jahn Restoration Workshop is nescessary to purchase Jahn Repair Mortars M70, M100, M120 and M160.