By selecting RBlock for your project, you gain significant advantages over standard concrete block. Its conventional size – 8-inches by 12-inches by 16-inches – with all the properties of an 8-inch by 8-inch by 16-inch concrete block, features an additional 2.75-inch channel cavity to inject R-7.1 per inch RFoam polyurethane for insulating, moisture barrier properties, RBlock’s design allows for grout and rebar reinforcement to meet additional structural requirements.