The Taper-Top Block typically makes up 1-2% of the ICF wall assembly on most residential and commercial jobs. This block has six strong, full-length, injection molded plastic ties made from Polypropylene (PP) regrind resin that are well marked with the words “Fox Blocks” located on both sides of the block. These ties secure the two pieces of modified Expanded Polystyrene (EPS) foam together that make up each block type. The blocks are stacked tightly together and inter-locked end to end to the desired wall length. Taper-Top Blocks are typically used at the top of the wall where the width of the concrete core needs to be increased to support other adjacent lateral loads (i.e., exterior roof truss loads, interior floor joist loads, hollowcore, etc.). Once a single layer or course of Taper-Top Blocks is installed, horizontal reinforcing steel bars are inter-locked securely together in the ties of the blocks.