Energy · IECC 2021 §R402.2.8 / Table R402.1.3
Basement Wall Insulation and Unconditioned Basement Exception
Basement wall section with the Table R402.1.3 wall R-value by zone and the six conditions that let an unconditioned basement skip wall insulation.. Referenced to IECC 2021 §R402.2.8 / Table R402.1.3.
The full text is for BuildSpec members
Read the complete section, search across every adopted code, run the calculators and ask Copilot — 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 →