With the foam on the interior and exterior surfaces, the walls can be finished by any common method.Įach foam block (often made of expanded polystyrene) is roughly one foot square by 40 inches long and costs from $4 to $5. The concrete flows throughout all the cavities and forms a solid strong monolithic insulated concrete wall. Using a pump truck, concrete is poured into the cavities at the top of the walls. The entire assembly is then reinforced with steel rods in the hollow cavities. Openings for windows and doors are easily cut into the foam. The hollow foam insulation blocks snap together to form the foundation and walls. The insulation value of foam blocks is as high as R-32. Interlocking hollow rigid foam blocks are designed to literally snap together like a huge Lego house. The simplicity of building with snap together foam blocks is ideal for the do-it-yourself builder/ helper. From indoors and outdoors, they look identical to any conventionally-built house. ![]() Some even survived a direct hit by Hurricane Andrew in otherwise destroyed neighborhoods. All of these methods produce a super-efficient house with utility bills 50 percent less than most similar-size houses.Īll are also extremely strong. ![]() Is this construction method efficient? - L.K.Īnswer - There are several new construction methods, including the snap together blocks, that use a combination of rigid foam insulation and concrete. It must be economically priced and super-strong to resist tornadoes. Question - I am considering building a 3,000-square-foot "snap together" insulating foam block house.
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