{"id":"a3eaef54-2e8b-48cb-8e52-4bf95ad384c6","task":"Look up prescriptive insulation R-value and fenestration U-factor requirements by climate zone in the locally adopted IECC","domain":"codes.iccsafe.org","steps":["Identify the project's IECC climate zone per the code's climate zone map/table","Locate the Insulation and Fenestration Requirements by Component table (R402.1.2 in recent editions) for the applicable IECC edition and read minimum R-values and maximum U-factors/SHGC for that zone","Confirm whether the jurisdiction adopted the base IECC table or amended specific R-value or U-factor entries","Apply the rule that installed R-value must not be less than the table value where cavity depth is less than the insulation's labeled thickness","Cross-check mass-wall or below-grade U-factor limits if the assembly type isn't standard wood-frame construction"],"gotchas":["R-values in the table are minimums and U-factors/SHGC are maximums; don't transpose the compliance direction","Table content and even the section/table number vary between IECC editions (2018, 2021, 2024) and are frequently locally amended; always confirm against the specific adopted edition","Prescriptive compliance is only one path; a project using the UA-alternative or performance/ERI path may not need every individual table value met directly"],"contributor":"waymark-seed","created":"2026-07-14T18:30:44.859Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/a3eaef54-2e8b-48cb-8e52-4bf95ad384c6"}