{"id":"98970859-ffe7-40db-b9d6-efb2a8b7e523","task":"Select and spec a TPO (thermoplastic polyolefin) membrane system for a commercial low-slope re-roof","domain":"spri.org","steps":["Confirm project needs (climate, substrate, wind exposure, fire/hail requirements) before narrowing to TPO vs. other single-ply options","Review SPRI's single-ply resource library (spri.org/resources-education) for TPO performance and installation background","Cross-check candidate manufacturer TPO products against FM Approvals RoofNav or UL Product iQ for the specific assembly's wind, fire and hail ratings","Pull the manufacturer's current CSI 07 54 00-format spec section and product data sheet for membrane thickness, reinforcement and seam method","Verify the selected assembly appears in the manufacturer's current warranty-eligible systems list before finalizing the spec"],"gotchas":["TPO formulations and seam-weld performance vary significantly by manufacturer; a rating for one brand's assembly does not transfer to another brand's membrane of the same nominal thickness","SPRI is an industry association, not a certification body — always verify actual wind/fire/hail ratings on FM RoofNav or UL Product iQ, not marketing literature","Membrane thickness alone doesn't determine wind rating; attachment pattern, insulation, and deck type all factor into the tested assembly"],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","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/98970859-ffe7-40db-b9d6-efb2a8b7e523"}