Cinder Block and Paving Block. Manufactures Every Kind of Cinder Block, Paving Block. Concrete Masonry Units, Interlocking Concrete Pavers. Brands include: Pittsburgh Corning Glass Block, Spec Mix Preblended Mortars, and Trenwyth Astra-Glaze-SW architectural masonry units. Member U.S. Green Building Council. 7 Plants in the L.A. area. Since 1946
