Energy · IECC 2021 §R402.3.3 / §R402.3.4
Glazing and Door Exemption Areas
Two small exemptions from the envelope U-factor rules: up to 15 sq ft of glazing per dwelling unit and one side-hinged opaque door up to 24 sq ft, neither valid for the Total UA alternative.. Referenced to IECC 2021 §R402.3.3 / §R402.3.4.
The rest of Glazing and Door Exemption Areas is for members
You're reading the opening of Glazing and Door Exemption Areas. Members see the complete text, every cross-reference and the tools on this page — free for 14 days, no card required.
- The annotated detail diagram with dimension callouts
- The code section it illustrates, in full
- Related diagrams in the same category
- Download and insert into a project
No card required. After the 14-day trial, plans start at $29/mo.
Our previews are real data — live counts, no placeholders. We publish our error log →