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International Building Code (IBC)

The IBC regulates all types of construction except detached one- and two-family dwellings and townhouses not more than three stories high. The IBC addresses minimum requirements for preserving the public health, safety and general welfare of the occupants of new and existing buildings or structures.

A majority of roofing-related code requirements are provided in IBC Chapter 15, "Roof Assemblies and Rooftop Structures." Attic ventilation requirements are provided in Chapter 12, "Interior Environment." Chapter 13, "Energy Efficiency," requires buildings be designed and constructed for energy efficiency in accordance with the International Energy Conservation Code (IECC). Provisions in the IECC include the minimum thermal insulation requirements for roof systems. IBC Chapter 16, "Structural Design Requirements," provides wind-load resistance requirements for roof systems. Below-grade dampproofing and waterproofing requirements are found in IBC Chapter 18, "Soils and Foundations."

According to the International Code Council, the developer and publisher of IBC, state and local jurisdictions in 50 states, the District of Columbia, the U.S. Virgin Islands, New York City, Guam and the Northern Marianas Islands use one of several versions of IBC as the technical basis for their adopted building codes.

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