Insulating Concrete Form Construction - Energy Efficient ICF homes are ECO conscious and health friendly because the blocks contain no toxic gases. They are extremely energy efficient and have a high R-value. ICF walls are straight and durable with squared corners. The walls consist of poured concrete and a continuous layer of foam insulation. The strong ICF walls and super insulation create a thermal mass which has many benefits. The homes maintain an even indoor temperature with a significant interior and exterior noise reduction. ICF walls will not expand or contract with moisture and have an unsurpassed solid structural integrity. They will not rot or decay or downgrade over time. The concrete is resistant to termites and other pests, and is fairly hypoallergenic. Advantages Include: