{"id":"54c08fb9-76de-49ee-bc91-9b13ca920159","task":"Repair or patch damaged SFRM without voiding the assembly's fire-resistance rating","domain":"awci.org","steps":["Assess the extent and cause of SFRM damage (impact, water exposure, trade-cut access) before selecting a repair method, since a minor patch versus full reapplication depends on damage scope.","Use the same SFRM product as originally applied where possible; if using a different repair material, confirm it is tested/listed as an approved repair material for the affected UL design.","Prepare the substrate — remove loose or damaged material back to sound SFRM or bare substrate, clean, and re-prime as required — before patching, since adhesion failure is a common repair-quality issue.","Reapply to match the original design thickness across the repaired area, verifying with the same thickness-testing approach used for original QC (ASTM E605 methodology).","Have the repair reviewed and accepted by a qualified inspector or through the manufacturer's approved-contractor process so the restored area is documented as meeting the original fire-resistance rating."],"gotchas":["Trowel-patching a material formulated for spray application often performs poorly, since spray-mix SFRM commonly contains a slippage/pumping additive not suited to hand troweling — use a patch-rated product or method instead of leftover spray material.","Repairs performed by an unapproved contractor or with an unapproved material can void the assembly's UL design compliance — confirm the repair contractor/material is manufacturer-approved or otherwise recognized for that specific design.","Don't treat a patch as complete without verifying restored thickness — a visually complete patch can still be under-thickness."],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","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/54c08fb9-76de-49ee-bc91-9b13ca920159"}