Couple builds polystyrene home, cuts energy bills

A couple building their own home with polystyrene blocks expect to reduce their energy bills by 70% due to the material's superior insulation properties. The couple is using insulated concrete framework (ICF) blocks, which slot together like Lego and are filled with concrete for structural integrity. This method is quicker and potentially cheaper than traditional building, despite a slightly higher upfront cost. The ICF construction is fire and flood-resistant, and the couple believes it's better for the environment due to reduced energy consumption, despite the concrete's carbon footprint.