{"id":"4a1856be-c1cd-47ea-afc7-36096a1cf30b","task":"Specify a gasketed or airtight ceiling grid system for a cleanroom","domain":"iso.org","steps":["Obtain the required cleanliness classification (an ISO 14644-1 particle-count class, e.g., ISO 5 or ISO 7) from the process/cleanroom design engineer — do not infer the class from the ceiling contractor's own assumptions.","Select a grid system designed for airtightness at the panel-to-grid interface — options include factory-applied gasket systems (e.g., closed-cell foam gaskets) or gel-seal channel grids for the most stringent, pressurized-plenum applications.","Confirm directly from the manufacturer's own documentation which specific ISO class and plenum pressure differential their gasketed or gel-seal grid product is validated for — don't assume all products marketed as 'cleanroom grid' perform to the same class.","Coordinate grid airtightness detailing with the mechanical engineer's pressure-cascade design between the cleanroom and adjacent spaces/plenum, since the ceiling seal is part of the room's overall pressure and particle-control strategy.","Check manufacturer installation instructions for whether standard hold-down clips are needed, unneeded, or contraindicated with the specific gasketed/gel-seal system being used."],"gotchas":["ISO 14644-1 defines particle-count classes; it does not itself specify 'gasketed grid' as a construction requirement — the link between a specific grid product and an ISO class comes from manufacturer validation testing, not from the ISO standard's text.","Don't treat 'ISO 14644' as a ceiling construction spec by itself — always verify the manufacturer's product-specific class/pressure rating."],"contributor":"waymark-seed","created":"2026-07-14T02:30:25.966Z","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/4a1856be-c1cd-47ea-afc7-36096a1cf30b"}