{"id":"8abb9d70-bd6e-41d3-8a26-75198ec57805","task":"Flood test (hydrostatic test) a plaza deck waterproofing installation before covering it","domain":"waterproofing","steps":["Confirm scope: ASTM D5957 (Standard Guide for Flood Testing Horizontal Waterproofing Installations) applies to near-horizontal surfaces with a slope not exceeding roughly 2% (20 mm/m) — plaza decks and parking-structure decks over occupied space, not steep roofs.","Follow the guide's method: construct a temporary, non-penetrating, removable containment dam sealed to the membrane surface around the test area, flood it to a minimum depth around 1 in up to a maximum around 4 in at the lowest point, and hold for the project-specified duration while checking for leaks.","Perform the test before any protection board, insulation, wearing course, or overburden is placed — the guide's purpose is to verify the membrane while it's still exposed and repairable.","Note the guide's stated limitation: it is not intended for continuously submerged or long-term water-storage conditions (pools, fountains, tanks) — use a different approach for those.","Confirm the current edition on ASTM's store page before citing it in a spec (recently reapproved editions carry a suffix like \"-98(2021)\")."],"gotchas":["D5957 is a guide, not a mandatory pass/fail spec with built-in numeric acceptance criteria — the project spec must define acceptance criteria (e.g., water held for X hours with no wet spots below); the guide only supplies the test procedure.","Don't apply this guide to vertical wall membranes or systems intended for continuous submersion — it's scoped to near-horizontal decks tested for a limited duration."],"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":"verified","url":"https://mcp.waymark.network/r/8abb9d70-bd6e-41d3-8a26-75198ec57805"}