Z--SAAN Rehabilitate San Jose Masonry Walls

Project Location: The Mission San Jose Convento is part of the San Antonio Missions National Historical Park. The Park consists of four (4) historic mission complexes built in the modern day San Antonio area by the Spanish in the early 1700s. The Convento is located at the North end of the Mission San Jose compound directly adjacent to and East of the Church. The address is 6701 San Jose Drive, San Antonio TX 78214. The Work consists of the following: 1. Stabilizing and/or repairing walls. 2. Adding or replacing cement mortar caps to preserve stone masonry and remaining historic Spanish Colonial period plasters. 3. Repointing stone masonry walls. 4. Cleaning and preserving remaining historic Spanish Colonial period plasters to prevent addition loss of these historic elements. 5. Cleaning stone masonry to remove biological growth. The Spanish Colonial plasters requiring cleaning and preservation are not "modern" plasters, i.e., they are not applied over lathe or blueboard. They were applied directly to the stone during the construction of the Missions with the final layer of plaster being a very thin coat. Water color paints or frescoes were often applied over the final layer. While the SOW discusses the underlying "scratch" coat, the real concern from a preservation standpoint is the protection of this thin final layer and the associated water colors/frescoes where they still exist. A more thorough/complete definition follows: Spanish colonial plasters are lime plasters made from water, sand, and slaked lime. The plasters were applied first with an arriccio or scratch coat (the first rough coat of plaster before the finish coat). Then an intonaco or a thin layer of smooth plaster is applied over the scratch coat. Finally the painted plasters can be frescoes (water color paint on wet plaster) or fresco secca (colors applied on dry plaster). Finally a lime wash might be applied over all of these layers to help adhere the coats together and to the stone. All of these stages of the rendering process are present on the San Jose convento and should be protected.

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Masonry, Common Work Results for Masonry, Masonry Mortaring, Unit Masonry.