The IBC does not require a weather resistant wall envelope over concrete or masonry walls designed in accordance with chapters 19 and 21 of the IBC.The IBC specifies a few cases where a weather-resistant exterior wall envelope is not required. The exterior wall must also include a way for water/condensation that enters the wall assembly to drain/evaporate. The design and construction of the exterior wall must include a water-resistive barrier behind the exterior veneer that prevents the accumulation of moisture within the wall assembly.
Specifically, section 1402.2 states that exterior walls must provide the building with a weather-resistant exterior wall envelope. Chapter 14 of the IBC provides these minimum requirements, including wall coverings, exterior doors and windows, exterior wall openings, and architectural trim. The 2018 International Building Codes (IBC) mandate that buildings meet minimum requirements for exterior walls. A weather-resistant exterior wall envelope ensures a building is energy-efficient and healthy. Using a high-quality house wrap that is compliant with the IBC 1402.2 and IRC R703.1.1 codes creates a structure with a weather-resistant exterior wall envelope. It should also be simple and quick to install, to limit damage during application.
#Irc code code
It must also meet the 2018 International Residential Code (IRC) for water resistance ( IRC R703.1.1).Ī superior house wrap is air- and moisture-resistant, permeable, and has a high UV-resistance and tear strength. When using a house wrap as a weather-resistant barrier (WRB), it must meet the 2018 International Building Codes ( IBC 1402.2) requirements of a WRB for water-resistance and vapor permeability.
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