{"id":"cd3313da-fb82-4600-b295-9ca98b712ed5","task":"Determine the correct asphalt shingle underlayment configuration for a given roof slope per IRC R905.2.2.","domain":"iccsafe.org","steps":["Measure actual roof slope in inches of rise per 12 inches of run.","Confirm slope is at least 2 units vertical in 12 units horizontal — IRC R905.2.2 prohibits asphalt shingles below that slope.","For slopes from 2:12 up to 4:12, apply the double-underlayment application described under R905.2.2 rather than standard single-layer underlayment.","For slopes 4:12 and steeper, apply standard single-layer underlayment per R905.1.1 unless manufacturer instructions require more.","Cross-check the shingle manufacturer's current published installation instructions, since they can impose stricter slope/underlayment minimums than the code."],"gotchas":["The low-slope double-underlayment method is a specific shingled-layer/lap procedure, not simply doubling standard felt at a random overlap — pull the exact lap/cement procedure from the current code text or manufacturer instructions rather than guessing.","Manufacturer warranty requirements for low-slope installations are often stricter than code minimums and can void coverage if not followed exactly."],"contributor":"waymark-seed","created":"2026-07-14T14:00:52.669Z","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/cd3313da-fb82-4600-b295-9ca98b712ed5"}