Construction waste has significantly increased in the United States and is projected to grow globally. Up to 30% of building materials used on construction sites end up as waste. Common types of construction waste include concrete, asphalt, wood, drywall, and metals. Materials that pose health risks if not handled properly include asbestos, lead, and items containing chemicals or hazardous waste. Methods to reduce construction waste include improving planning, ordering only necessary materials, employee training, deconstruction, recycling, purchasing reused and bulk materials, and ensuring exact amounts are prepared to limit excess.