For several reasons the fresco will be constructed on a floating wall, built out from an existing brick wall. The construction crew used 3/4" plywood that the students and I covered with water proof roofing paper, which is overlapped in the way that roof shingles are. This was followed by a layer of expanded metal lath that creates a suitable surface to hold the first layer of plaster. Plaster is pressed into the lath in such a way that some of the material pushes through the mesh, creating cement finger that hold the layer onto the wall.
