Portable classrooms and modular classroom buildings are cost-effective building solutions to accommodate long-term and temporary classroom overcrowding problems. Expansion of conventional school buildings can be costly and time consuming. Portable classrooms and permanent modular classroom building construction, provide an economical alternative to alleviate overcrowded school classrooms. Temporary portable classrooms can be installed onsite in just a few weeks, and permanent modular classroom buildings can be installed on site up to 50% more quickly than conventionally built classrooms.