Free REScheck Alternative

IECC envelope compliance in 60 seconds. Enter your insulation R-values and areas — get instant pass/fail + a professional PDF report.

Total UA Alternative per IECC Section R402.1.5

1 Where's the project?

ZIP Code

Climate Zone auto

IECC Edition

2 What's the foundation?

3 Enter your insulation & areas

Type R-values (like R-38) and square footage for each part of the house. We convert to U-factors automatically.

Component Area (ft²) R-Value

Project Name

Address

Builder / Applicant

Plan / Permit ID

Your UA

—

Max UA

—

Margin

—

Code

—

Component	Area	U-Yours	U-Max	UA Yours	UA Max	OK?

Code: IECC 2018 §R402.1.5 (Total UA Alternative), Table R402.1.4, Climate Zone 5.