{"id":"0751cc9b-f98c-4f0a-b1b1-f6d4f7eb0c74","task":"Test a complete air barrier wall assembly (not just the membrane material) for air leakage before large-scale construction","domain":"astm.org","steps":["Use ASTM E2357, Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies, to evaluate a representative assembly rather than an isolated material","Confirm the method measures air leakage through both an 'opaque' non-penetrated wall assembly and a version with typical penetrations (pipe penetrations, brick ties, electrical boxes, foundation transitions, lap seams, and flashings)","Confirm the assembly is subjected to specified conditioning cycles before and after leakage measurement, per the standard's protocol","Compare results against the applicable code assembly-compliance threshold (e.g., IECC assemblies-compliance option, historically ≤0.04 cfm/ft² at 75 Pa)","Verify current edition on the ASTM E2357 catalog page and confirm which code edition's compliance table the project references","Use this data to support the BECx design-phase peer review sign-off on air barrier continuity details"],"gotchas":["E2357 is intentionally more representative of real-world performance than E2178 material testing — a material that passes E2178 in isolation can still fail as an installed assembly due to penetrations and transitions","Some code tables also allow alternate assembly test standards (e.g., ASTM E1677, ASTM E283) — confirm which standard the specific code edition and assembly type actually references before treating E2357 as the only path"],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","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/0751cc9b-f98c-4f0a-b1b1-f6d4f7eb0c74"}