What are ICFs?

Insulating Concrete Forms (ICFs) are hollow blocks or panels made of polystyrene foam held together with plastic webs. These blocks or panels are then stacked to form a wall. Reinforcing steel and concrete are placed in the hollow void to create a very strong and energy-efficient wall system.

ICF's typically fall into either a “block” or “panel” categorie.  “Panel” icf's are comprised of independent foam panels, either vertical or horizontal, that are connected with either plastic or steel ties.  “Block” icf's incorporate a plastic or steel tie that is molded into the foam to create a block that interlocks with adjacent forms.

Within these two basic ICF types, there are three styles relating to the structure of the concrete in the forms.  “Flat wall” systems have a continuous thickness of concrete throughout the wall system.  “Grid” systems have a waffle pattern in which the concrete thickness varies throughout the wall.  “Post and Beam” or “Screen” systems have horizontal beams and vertical columns of concrete with voids in between that is solid foam.

The stay-in-place forms provide for continuous layers of insulation while the plastic or metal ties provide attachment points for interior and exterior finishes.

- Technical Briefs -

The ICF EffectShelter from a Storm

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