Re-valuing construction materials and components through design for disassembly

The expected operational lifespan of modern buildings has become disturbingly short as buildings are replaced for reasons of changing cultural expectations, style, serviceability, locational obsolescence and economic viability. The same buildings, however, are not always physically or structurally obsolete; the materials and components within them are very often still serviceable. While there is some recycling of selected construction materials, such as steel and concrete, this is almost always in the form of down cycling or reprocessing. One significant impediment to reuse is that buildings are not designed in a way that facilitates easy recovery of materials and components. This chapter explores the potential for the recovery of materials and components if buildings were designed for such future recovery, utilizing the strategy of design for disassembly. As well as assessing material waste, this chapter presents research into the analysis of the embodied energy in buildings, highlighting its significance in comparison with operational energy. Analysis at material, component and whole of- building levels shows the potential benefits of strategically designing buildings for future disassembly to recover this embodied energy. Careful consideration at the early design stage can result in the deconstruction of significant portions of buildings and the recovery of their potential through higher order reuse and upcycling