Put on an 1500 square foot addiition on to this house, we joined the house to the garage, this addition has a full insulated basement, we used fox blocks for the forms which gives you the insulation you need and when you go to finish the basement you dont need to frame or insulate, you can screw the sheetrock right to the forms. It is not painted yet, we put on primed siding which will be done next summer..