Verify code acceptance of a proprietary one-coat stucco system via its ICC-ES evaluation report (ESR)
domain: icc-es.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Identify the manufacturer's product line and locate its specific ESR number from the manufacturer's literature or the ICC-ES report directory
Download the current ESR PDF from icc-es.org and confirm it has not expired or been superseded
Check the report's stated code editions of compliance (IBC/IRC) match the jurisdiction's adopted code
Read the conditions of use section for substrate limitations, maximum thickness, climate restrictions, and required WRB/flashing details
Cross-check any local amendments, since some jurisdictions restrict or add conditions to one-coat systems beyond the ESR
Known gotchas
An ESR is product- and formulation-specific; a substitution or field-mixed variation of the proprietary material voids the report's code compliance basis
ESRs expire and are periodically reissued with revised conditions — always verify the report is current, not a cached or superseded PDF
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