Overview Filter Point Linings provide erosion-resistant, permeable concrete linings for structures constructed over firm subgrades and relatively low hydrostatic loads. Its double-layer fabric form is joined by interwoven filter points (drains) to form a concrete lining with a deeply cobbled appearance. Filter Point Linings were the first type of fabric-formed concrete system developed. As the use of this technology has … Continue reading FILTER POINT LININGS PRODUCTS