ln the building preservation community, it is generally agreed that biological growth can adversely affect both the appearance and durability of stone, concrete, and other masonry materials.
In existing masonry construction, the connection between masonry veneers and the back-up materials can be compromised over time. Mechanical retrofit anchors are designed to functionally replicate wall ties that were either inadequately installed, corroded, or insufficient in number.
Commission 25-PEM is a RILEM technical committee that has developed tests to measure the deterioration of stone and to assess the effectiveness of treatment methods.
RILEM tube tests are used to evaluate the performance of water repellents in the field. Procedures for the 5.0 mL tube and 60 mph tube are described below.