Rebar is the structural element that ties walls, floors and ceilings together. When combined with high PSI concrete it delivers unmatched strength and survivability to hurricanes and earthquakes. Larger cavity block and open ICF form design makes it easy to install rebar and pour concrete without leaving vulnerable voids. Walls that lack rebar or are not filled completely are more more likely collapse in earthquakes or from hurricane winds and can be penetrated when exposed to hurricane winds and flying debris. Any breach of the structural envelop can spell disaster in a hurricane including windows, doors, garage door openings and roofs that lack structural integrity or are not attached to walls sufficiently.