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Insulated Concrete Forms (ICF's) are stay - in - place forms (or blocks) that are constructed out of a product called expanded polystyrene (EPS), more commonly known as Styrofoam. These blocks form the framework for the exterior walls of a house. They are used in both below and above ground applications. Once the blocks are stacked, steel reinforcement rod (Rebar) is inserted and then concrete is poured into the cavities. Once the concrete has cured, the result is a solid continuous (monolithic) air-tight steel-reinforced concrete wall surrounded by several inches of insulating EPS. There are many advantages to using this type of construction; some of the most significant benefits are:
| Quality and Comfort | |
| Superior indoor air quality - As a result of a monolithic wall constructed of concrete, drafts/air infiltration in the exterior walls are eliminated. This, in conjunction with an air exchanger, creates air quality virtually free of airborne pollen, dust, and allergens. | |
| Quieter Home- Outdoor noise is nearly eliminated. | |
| Ideal for Superior Acoustics- Allows homeowners to take full advantage of sophisticated sound systems and home theaters. | |
| Basements- Basements can be finished more easily than in a conventionally built house. Since the drywall attaches directly to the foam block, there is no need to "fur out" from the exterior walls. In addition, due to this "tight" construction, ICF basements are not damp or musty. | |
| Energy Efficiency | |
| Reduced HVAC system size- As a result of the overall increased efficiency of a house constructed out of ICF's, the sizing requirements of the heating and cooling equipment is reduced. | |
| Reduction in Heating & Cooling costs- With an R-value (standard measure of insulating efficiency) of R-32, ICF's offer a significant improvement over conventional stick framed houses (R-11 or R13). With the additional R-value inherent to ICF construction, a savings of 50%-80% on heating and cooling costs can be realized. | |
| Safety & Security | |
| Strength- An ICF wall is capable of withstanding winds up to 200 miles per hour. | |
| Protection- ICF's afford excellent protection from high winds, tornadoes , and flying debris. In addition, they have a minimum 3 hour fire rating. | |
Collectively, these features ensure that a house constructed of ICF's will provide the homeowner with immediate tangible benefits and reduced monthly costs for the life of the home.