Precast buildings protect the contents from rain, sun, snow, fire, rodents, and even bullets. Precast buildings also offer the beauty, durability, and low maintenance of concrete. Exposed aggregate and ribbed architectural finishes are the most popular, but most utility building precasters custom design any finish desired. Several precasters around the country make their own specially designed buildings. Some offer only the empty concrete building. Others will finish the walls, floor, and ceiling and install equipment to further protect and control the environment inside the building. A complete turn-key package can include heating, air conditioning, lighting, dehumidifier, smoke detectors, and intrusion alarms.