2. Identification and quantification of the basic processes associated with construction and deconstruction. Depending on the volume of material used in construction, and by applying the ratios set by Kellenberger et al. [53], the energy (electricity power and diesel used in building machines) used in the operations of construction, maintenance and demolition of each model is obtained. The processes related to transport are obtained bydetermining the mass of material transported associated witheach material used, and considering the distance from factoryto site and from the site to landfill. Were considered medium distances for each material, assuming an urban construction site according to the method described by Garcia [52]. Finally, the processes associated with the end of life of the materials used