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We formed up the foundation using Insulated Concrete Forms (ICF for short). These forms look a lot like giant Lego blocks but they are made of Styrofoam. After assembling them they are filled with concrete. The advantage here is that you get a very high R Value foundation wall keeping the cold outside. This house had a poured concrete 1st floor. The client left the floor as is with just a high gloss sealer applied (lots of money saved on finished flooring). All the exterior walls where framed with 2x6 lumber, this gives you greater strength as well as more room for insulation. The floor joist where Engineered I joist (very strong and Green for the environment). The entire exterior of the house was sheathed with Zip Board. This is a high grade sheathing material that has a 35 year rot warranty and does not require the installation of house wrap. We used JELD-WEN Windows and doors and PVC trim for all the exterior trim. PVC trim will never rot, is insect proof and can be left unpainted if you like white trim. All the siding was by Hardi Siding (this is a fiber cement product). Hardi siding is fireproof, rot proof and pretty much impervious to anything. The whole house was sprayed foamed with 2lb. foam.