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Below is another drawback for block walls; they are much more prone to water leaks as a result of the variety of joints in between each block. The cores inside the blocks can also fill with water, fill the blocks, and create wetness inside basements. A drawback located in a cinder block wall structure is they are more probable to suffer concerns like twisting and bowing. Bending and bowing result from poor building and construction or underground side water stress. A lot of the concrete-form walls use a safe polystyrene foam