This division includes green options for dealing with pre-existing buildings during new construction and renovations. It is especially important to identify and properly deal with hazardous substances in older buildings. Common hazardous substances are lead in paint, asbestos in insulation and fireproofing materials, mercury in fluorescent lighting, and PCBs (polychlorinated biphenyls) in lighting ballasts.
Beyond thinking about hazardous materials, be aware of recycling and salvage options for older buildings. Salvage companies can quickly harvest usable and valuable elements from older buildings, reducing tipping fees as well as saving irreplaceable architectural elements.
Non-reusable construction materials can often be recycled, again saving on tipping fees, and reducing the amount of material being landfilled.