Specifications include, but are not limited to: (1) All exterior brick, stone and terra cotta surfaces shall be washed with pressurized water atapproximately 1000 PSI. Where necessary to remove stubborn stains, a chemical cleaning agentshall be applied to the surface, allowed to dwell, and then rinsed in accordance with themanufacturer’sspecifications.Thechemicalcleaningagentsshallbeappliednomorethantwotimes to any masonry surface.(2) A careful inspection of all mortar joints shall be completed and joints that are found to bevoid, open or defective shall be cut back to a depth ¼-inch deeper than the width of the joints,or to sound backing. All cut mortar joints and face of masonry shall be cleaned with air and/orwater pressure to remove any loose or foreign residue.(3) Defective mortar joints that have been cut and cleaned shall then be pointed (filled andtightly packed) with a non-staining, non-shrinking, Type “N” masonry pointing mortar, coloredand tooled to match the adjacent joints in appearance as closely as possible. Prior to installingthe new mortar, the masonry surfaces shall be thoroughly wet, with no standing water(saturated surface dry).
