The Young Building is a heritage designated structure completed in 1914 in Victoria, B.C., Canada as a school for teachers. The exterior cladding is brick masonry and sandstone. The original sandstone displayed signs of deterioration as early as 1917. A team headed by Carl Peterson was commissioned to analyze the extent and effect of the deterioration of the exterior of the building and provide a seismic performance evaluation.   It was discovered that the condition of the sandstone was beyond repair. Many masonry ties securing the brick cladding to building had failed. There were also numerous sources of water ingress. The recommendation of the study team was to replace all of the exterior cladding.   The nearest source of a suitable replacement sandstone was Iowa, and the cost was prohibitive. An alternative material, cast stone, was suggested by Gordon McLeod. This alternative proved cost effective and was approved by local heritage officials.   The design team for the $7.3 million restoration project has utilized an exterior cladding system incorporating a rain screen of cast stone and brick masonry. Existing clay tile infill has been reinforced with a glass fibre reinforced plastic system.   McLeod Masonry completed production of over 60% of the cast stone in only three months using a high tech cement base of calcium silicate aluminate. Intricate units have been molded from various materials, including rubber, fiberglass, wood, plastic and foam. The project was substantially complete in October 2000. See the Camosun College website for more information and photos about the project.