The head custodian is responsible for devising a plan for the cleaning of each office or room in his building on a daily basis, such as dusting, vacuuming, washing windows, waxing floors and shampooing carpets. The head custodian orders materials necessary for the upkeep of the building while staying within his assigned budget. He is also responsible for overseeing any minor repairs. In some cases, he may make the repairs himself, such as fixing a leaky faucet, or he might call a licensed professional to perform the task, such as rewiring a defective electrical outlet. The head custodian is in charge of routine maintenance of the building’s HVAC system, such as changing filters. He oversees the care and maintenance of the exterior grounds, and completes any repairs necessary to the exterior of the building in a timely manner.