Exterior walls are the outermost structures of a building, providing protection from weather elements and contributing to the overall aesthetic. They are typically made from materials like brick, wood, concrete, or vinyl, each offering different benefits in terms of durability, insulation, and maintenance. These walls also play a crucial role in energy efficiency by helping to regulate indoor temperatures. Proper insulation within exterior walls can reduce heating and cooling costs, making them an essential component of sustainable building practices. Additionally, exterior walls can support windows and doors, enhancing both functionality and design.