Transcription of 2021 Oregon Residential Specialty Code
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2021 Oregon Residential Specialty Code
Page 1 of 85 2021 Oregon Residential Specialty Code Significant changes summary April 2021 The following is a summary of significant changes in the 2021 Oregon Residential Specialty Code (ORSC) from the previous edition. The 2021 ORSC is based on the 2018 International Residential Code (IRC). This summary is intended to help with the transition from the previous edition and does not include all changes adopted in the 2021 ORSC. Part I of this summary is a matrix identifying the sections with significant changes and a summary of each change.
Added allowances to use Class III vapor retarders for framed walls where vented cladding is installed ... systems designed to operate in parallel with mandatory radon mitigation. Page 4 of 85 Section Topic / Summary of change ... • Reduced the required fenestration U-factor in Table N1101.1(1) from U-0.30 to U-0.27.
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