{
 "page": "https://instabids.ai/us/property-managers/apartment-communities/roofing",
 "skillVersion": "3.10.4",
 "rows": [
  {
   "fact_id": "rf-pitch",
   "label": "EPA recommends roofing materials appropriate for the pitch.",
   "value": "¼:12 (2 percent)",
   "source_value": null,
   "unit": "minimum slope for most low-slope roofs, except metal roofs, in EPA guidance",
   "grain": "agency (US EPA)",
   "period": "EPA 402-F-13053, December 2013; read 2026-11-06",
   "source_name": "US EPA — Moisture Control Guidance, Roof and Ceiling Assemblies",
   "url": "https://www.epa.gov/sites/default/files/2014-08/documents/moisture-control.pdf",
   "read_date": "2026-11-06"
  },
  {
   "fact_id": "rf-drain-design",
   "label": "EPA recommends positive roof drainage, including manufacturer drain placement and drainage within a maximum of 48 hours after precipitation.",
   "value": "48",
   "source_value": null,
   "unit": "hours maximum after precipitation for roof drainage in EPA guidance",
   "grain": "agency (US EPA)",
   "period": "EPA 402-F-13053, December 2013; read 2026-11-06",
   "source_name": "US EPA — Moisture Control Guidance, Roof and Ceiling Assemblies",
   "url": "https://www.epa.gov/sites/default/files/2014-08/documents/moisture-control.pdf",
   "read_date": "2026-11-06"
  }
 ]
}