{"id":"48062d7f-bd93-4245-b3e8-35509a38ddba","task":"Apply IRC fastening requirements for asphalt shingles (minimum fastener count, type, and placement)","domain":"construction.roofing.residential.steep-slope","steps":["Identify the IRC edition adopted by the jurisdiction (editions vary by state/locality) before citing a section number, since numbering has been stable at R905.2.6/R905.2.6.1 in recent editions but content changes between cycles.","Confirm baseline fastener count: not less than four fasteners per strip shingle (or two per individual shingle) unless the manufacturer's installation instructions or a higher wind-classification requirement calls for more.","Check whether the local wind speed or the shingle's tested wind classification triggers a manufacturer-specified higher fastener count (commonly six nails in high-wind installations) — this overrides the code minimum.","Verify fastener spec: corrosion-resistant (galvanized steel, stainless steel, aluminum, or copper) roofing nails, minimum shank/head dimensions per the applicable ASTM fastener standard, long enough to penetrate through the shingle and adequately into the deck.","Confirm nail placement is within the manufacturer's designated nailing zone/strip on the shingle — high placement is a leading cause of code and warranty failures even when count is correct.","Document that the deck itself meets minimum thickness/fastening requirements, since shingle fastener penetration requirements are tied to sheathing thickness."],"gotchas":["Meeting the code minimum fastener count does not satisfy the manufacturer's installation instructions if the instructions require more (e.g., for wind classification) — code minimums and manufacturer instructions must both be checked, and the stricter governs.","High-nailing (above the designated nail zone) is a common field defect that voids both code compliance intent and manufacturer warranty even when the fastener count is correct."],"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/48062d7f-bd93-4245-b3e8-35509a38ddba"}