{
  "rows": [
    {
      "fact_id": "nahb-gutters-aluminum-20",
      "type": "Aluminum gutters",
      "measure": "survey-based life expectancy guideline",
      "value": "20",
      "value_high": "",
      "unit": "years",
      "area": "US homes",
      "data_years": "2006 (study published 2007)",
      "source": "NAHB home-components study",
      "url": "https://pointofviewhomeinspection.com/NAHB-Lifetimes.pdf",
      "read": "2026-11-02",
      "n": "not published by the source",
      "se_points": ""
    },
    {
      "fact_id": "nahb-gutters-copper-50plus",
      "type": "Copper gutters",
      "measure": "survey-based life expectancy guideline",
      "value": "50",
      "value_high": "",
      "unit": "years (more than 50)",
      "area": "US homes",
      "data_years": "2006 (study published 2007)",
      "source": "NAHB home-components study",
      "url": "https://pointofviewhomeinspection.com/NAHB-Lifetimes.pdf",
      "read": "2026-11-02",
      "n": "not published by the source",
      "se_points": ""
    },
    {
      "fact_id": "nahb-gutters-galvanized-steel-20",
      "type": "Galvanized steel gutters and downspouts",
      "measure": "survey-based life expectancy guideline",
      "value": "20",
      "value_high": "",
      "unit": "years",
      "area": "US homes",
      "data_years": "2006 (study published 2007)",
      "source": "NAHB home-components study",
      "url": "https://pointofviewhomeinspection.com/NAHB-Lifetimes.pdf",
      "read": "2026-11-02",
      "n": "not published by the source",
      "se_points": ""
    },
    {
      "fact_id": "nahb-downspouts-aluminum-30",
      "type": "Aluminum downspouts",
      "measure": "survey-based life expectancy guideline",
      "value": "30",
      "value_high": "",
      "unit": "years",
      "area": "US homes",
      "data_years": "2006 (study published 2007)",
      "source": "NAHB home-components study",
      "url": "https://pointofviewhomeinspection.com/NAHB-Lifetimes.pdf",
      "read": "2026-11-02",
      "n": "not published by the source",
      "se_points": ""
    },
    {
      "fact_id": "nahb-downspouts-copper-100plus",
      "type": "Copper downspouts",
      "measure": "survey-based life expectancy guideline",
      "value": "100",
      "value_high": "",
      "unit": "years (100 or more)",
      "area": "US homes",
      "data_years": "2006 (study published 2007)",
      "source": "NAHB home-components study",
      "url": "https://pointofviewhomeinspection.com/NAHB-Lifetimes.pdf",
      "read": "2026-11-02",
      "n": "not published by the source",
      "se_points": ""
    }
  ]
}