IRC2018N1102.1

Building Thermal Envelope — General

Plain-English Explanation

Section N1102.1 establishes energy efficiency requirements for building thermal envelope — general. These requirements help reduce energy costs and ensure your home meets minimum insulation and efficiency standards for your climate zone.

For the Contractor

Per IECC N1102.1 (Building Thermal Envelope — General): verify R-values, U-factors, and SHGC meet climate zone requirements per Table R402.1.2. Document insulation labels and depths before covering.