Alternative building technologies such as stabilized soil blocks can minimize a building’s embodied energy [6–12]. Generally, the materials used to construct the structure of a building represent more than 50% of its embodied energy [13]. In this sense, the use of alternative materials, such as mortar/concrete blocks, stabilized soil blocks or fly-ashes instead of materials with high embodied energy content, like reinforced concrete, could cut cumulative energy by 20% over a building’s 50-year life cycle [14]. Recycling building materials [15,16] is also essential to reducing the embodied energy level in the building, for instance, the use of recycled steel and aluminium confers can mean savings of more than 50% in embodied energy [17].