{"id":"4978695b-9921-4bc6-962f-25c226c188e2","task":"Source matching materials and plan repairs for an existing natural slate roof","domain":"construction.roofing.residential.steep-slope","steps":["Identify the slate's quarry origin, thickness, and color/texture characteristics where possible (from remaining roof records, visible grain, or a slate-industry consultant) before sourcing replacement pieces, since slate varies significantly by quarry and mismatched replacement slate is visually and sometimes structurally different (weathering rate, thickness).","For isolated repairs, prioritize sourcing salvaged/reclaimed slate matching the existing roof's characteristics over new slate, since exact color/texture matches to older quarried stock are often unavailable in new production.","Inspect and address the underlying flashing, fasteners (typically copper or stainless hooks/nails), and underlayment condition during any slate repair, since slate roof failures are frequently a fastener or flashing failure rather than slate breakage itself.","Confirm the repair contractor has specific slate-roofing experience (a distinct trade skill from asphalt/shingle roofing) given the different tooling, fastening, and walking-load techniques slate requires to avoid cracking adjacent tiles.","For larger repair or full replacement scopes, get a structural check on the deck/framing's capacity for slate's substantially higher dead load compared to the asphalt shingles it may be compared against, since slate weight is a major factor unaddressed by cosmetic-only repair specs."],"gotchas":["New slate production commonly cannot exactly match the color, thickness, or weathering characteristics of older quarried slate — reclaimed/salvaged slate sourcing is often the more reliable path for visual match on repairs, not new-cut slate.","Slate roof problems are very often fastener or flashing failures (rusted nails/hooks, failed copper) rather than slate material failure — a repair scope focused only on replacing broken slate pieces without inspecting fasteners/flashing often fails to fix the underlying leak."],"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/4978695b-9921-4bc6-962f-25c226c188e2"}