$HTSC You will often see ICF construction projects using a waffle-style blueprint for the project because the design uses about 10% less concrete than if you build a straight-form option. Even if you prefer the straight-form blocks when putting together a structure, you will develop more strength with six inches of concrete compared to an 8-inch traditional wall. That means you can save up to 25% of the materials and cost when pursuing this method, reduce your overall curing time, and provide more reinforcement to the overall structure.