Study after Study Conclude Concrete Homes Are More Energy Efficient Than Frame Homes: 

Energy savings and comfortable living are built into an ICF home. Today's concrete home is comfortable all year round and paying less for utility bills simply adds to the enjoyment of living in a home that is built to last not only your lifetime but the lifetime of your children's children. That is why we named our company Legacy ICF. We are building legacys. With an ICF home you get the solid construction of concrete which creates a continuous airtight wall devoid of air leaks that plague a typical structure. The expanded polystyrene ICF forms remain in place after placing the concrete which is where your home gets its exceptional R-value. The R-value of ICF forms filled with concrete varies from brand to brand. R-Value is the measure of the thermal conductivity properties of a specific product. The R-value of a Logix block is R-24, which is only one of the many reasons why we build with it. A better measure of insulating properties is the U-Value. The U-Value of a typical 6" ICF wall in the Pacific Northwest performs like an R-42 wood wall. Conventional 2x6 wood frame walls with R-21 insulation typically performs at a R-13 wall because of the uninsulated portions, stud spaces, and rim joists in the conventional 2x6 wood frame wall.