{"id":"47278320-a27b-465d-923a-c83e2e0d3da7","task":"Recommend a paint/coating recoat for stucco while preserving wall breathability","domain":"astm.org","steps":["Test the existing coating condition and moisture content of the substrate before selecting a new coating","Determine the required vapor permeance for the assembly; conventional cementitious stucco generally benefits from a higher-perm (more breathable) coating measured per ASTM E96","If elastomeric coating is being considered for its crack-bridging ability, weigh its typically lower vapor permeance against the wall's drying needs, especially over framed assemblies without a strong outward-drying path","Remove failing/thick prior coating layers (e.g., by pressure washing or mechanical means) rather than simply adding another coat on top of a already-thick, degraded film","Repair cracks beyond the new coating's bridging capability with a compatible patch material before the finish coat is applied"],"gotchas":["Elastomeric coatings bridge cracks well but are generally less vapor-permeable than standard acrylic or mineral coatings; specifying elastomeric on a wall that relies on outward drying can trap moisture","Vapor permeance is measured and compared using ASTM E96; perm claims from different manufacturers should be checked against that common test method rather than compared as marketing numbers alone"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","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/47278320-a27b-465d-923a-c83e2e0d3da7"}