{
  "version": "2026-08-29.1",
  "checked_date": "2026-08-29",
  "demand": {
    "r_value_chart": {
      "country": "US",
      "observed_bin": ">1,000 monthly",
      "difficulty": "Medium",
      "family_size": 53,
      "source": "AHREFS_FREE_MEASUREMENTS_2026-08-29.csv",
      "note": "Observed free-tool demand bin for insulation r value chart, not exact volume or a traffic forecast."
    },
    "attic_insulation_cost": {
      "country": "US",
      "observed_bin": ">1,000 monthly",
      "difficulty": "Easy",
      "family_size": 202,
      "source": "AHREFS_FREE_MEASUREMENTS_2026-08-29.csv",
      "note": "Observed free-tool demand bin for attic insulation cost, not exact volume or a traffic forecast."
    }
  },
  "sources": {
    "energy_star_targets": {
      "title": "Recommended Home Insulation R-Values",
      "url": "https://www.energystar.gov/saveathome/seal_insulate/identify-problems-you-want-fix/diy-checks-inspections/insulation-r-values",
      "publisher": "ENERGY STAR / U.S. Environmental Protection Agency",
      "scope": "Retrofit recommendations for existing wood-framed buildings; source notes a 2021 IECC basis."
    },
    "energy_star_checks": {
      "title": "What to Look For: DIY Checks and Inspections",
      "url": "https://www.energystar.gov/saveathome/seal_insulate/identify-problems-you-want-fix/diy-checks-inspections",
      "publisher": "ENERGY STAR / U.S. Environmental Protection Agency",
      "scope": "Depth multipliers for a rough estimate of existing attic insulation R-value and attic safety notes."
    },
    "energy_star_attic": {
      "title": "Adding Attic Insulation",
      "url": "https://www.energystar.gov/saveathome/seal_insulate/do-it-yourself-guide/adding-attic-insulation",
      "publisher": "ENERGY STAR / U.S. Environmental Protection Agency",
      "scope": "General attic-insulation and air-sealing sequence; not a project quotation."
    },
    "owens_l77": {
      "title": "ProPink L77 coverage calculator",
      "url": "https://www.owenscorning.com/en-us/insulation/residential/ulf-calculator",
      "publisher": "Owens Corning",
      "scope": "Manufacturer coverage rows; local bag price remains a user input."
    },
    "jm_epd": {
      "title": "Johns Manville fiberglass loose-fill environmental product declaration",
      "url": "https://www.jm.com/content/dam/jm/global/en/building-insulation/Files/BI%20Toolbox/110.1_EPD_JM_2022%20Fiberglass%20Loose%20Fill.pdf",
      "publisher": "Johns Manville / UL Environment",
      "scope": "Manufacturer product description and R-30 coverage statement."
    },
    "dunn_c84a": {
      "title": "Owens Corning C84A R-30 unfaced batt retail listing",
      "url": "https://www.dunnlumber.com/owens-corning-unfaced-insulation-r-30-16-x-48-batts-10-batts-bundle-53-33sf-insulc84a.html",
      "publisher": "Dunn Lumber",
      "scope": "Regional retail snapshot; price and availability vary by date and location."
    },
    "fbm_climate_pro": {
      "title": "Johns Manville Climate Pro B-7700 retail listing",
      "url": "https://myfbm.com/all-products/insulation/loose-fill%2C-blow-in%2C-cellulose/climate-pro-b-7700-loose-fille-blow-in-fiberglass-insulation/p/lf-climatepro-b7700-jm",
      "publisher": "Foundation Building Materials",
      "scope": "Distributor snapshot with a 39-bag minimum order; price and availability vary by branch and date."
    }
  },
  "climate_targets": [
    {
      "zone": "1",
      "uninsulated_attic_r_us": 30,
      "existing_3_4_in_attic_r_us": 25,
      "floor_r_us": 13
    },
    {
      "zone": "2",
      "uninsulated_attic_r_us": 49,
      "existing_3_4_in_attic_r_us": 38,
      "floor_r_us": 13
    },
    {
      "zone": "3",
      "uninsulated_attic_r_us": 49,
      "existing_3_4_in_attic_r_us": 38,
      "floor_r_us": 19
    },
    {
      "zone": "4A and 4B",
      "uninsulated_attic_r_us": 60,
      "existing_3_4_in_attic_r_us": 49,
      "floor_r_us": 19
    },
    {
      "zone": "4C, 5 and 6",
      "uninsulated_attic_r_us": 60,
      "existing_3_4_in_attic_r_us": 49,
      "floor_r_us": 30
    },
    {
      "zone": "7 and 8",
      "uninsulated_attic_r_us": 60,
      "existing_3_4_in_attic_r_us": 49,
      "floor_r_us": 38
    }
  ],
  "existing_r_per_inch": [
    {
      "id": "loose_fiberglass",
      "material": "Loose fiberglass",
      "appearance": "Lightweight yellow, pink or white loose fibers",
      "r_us_per_in": 2.5
    },
    {
      "id": "loose_rock_wool",
      "material": "Loose rock wool",
      "appearance": "Dense gray or near-white loose fibers, sometimes with black specks",
      "r_us_per_in": 2.8
    },
    {
      "id": "cellulose",
      "material": "Cellulose",
      "appearance": "Small gray flat pieces or fibers from newsprint",
      "r_us_per_in": 3.7
    },
    {
      "id": "vermiculite_perlite",
      "material": "Vermiculite or perlite",
      "appearance": "Lightweight granules; do not disturb suspected vermiculite before appropriate assessment",
      "r_us_per_in": 2.7
    },
    {
      "id": "batt_fiberglass",
      "material": "Fiberglass batts",
      "appearance": "Lightweight yellow, pink or white batts",
      "r_us_per_in": 3.2
    }
  ],
  "product_snapshots": [
    {
      "id": "oc_c84a_r30",
      "product": "Owens Corning C84A R-30 unfaced fiberglass batts",
      "method": "batt",
      "added_r_us": 30,
      "coverage_ft2_unit": 53.33,
      "price_usd_unit": 63.88,
      "minimum_order_units": 1,
      "property_source": "dunn_c84a",
      "price_source": "dunn_c84a",
      "checked_date": "2026-08-29",
      "note": "Seattle-area regional retail snapshot. Confirm local price, dimensions, facing and application before use."
    },
    {
      "id": "jm_climate_pro_r30",
      "product": "Johns Manville Climate Pro B-7700 loose-fill fiberglass",
      "method": "loose_fill",
      "added_r_us": 30,
      "coverage_ft2_unit": 77.0,
      "price_usd_unit": 66.0,
      "minimum_order_units": 39,
      "property_source": "jm_epd",
      "price_source": "fbm_climate_pro",
      "checked_date": "2026-08-29",
      "note": "Distributor snapshot lists a 39-bag minimum. Coverage is R-30; use the current product label for other R levels."
    },
    {
      "id": "oc_l77_r30",
      "product": "Owens Corning ProPink L77 loose-fill fiberglass",
      "method": "loose_fill",
      "added_r_us": 30,
      "coverage_ft2_unit": 77.0,
      "price_usd_unit": 0.0,
      "minimum_order_units": 1,
      "property_source": "owens_l77",
      "price_source": null,
      "checked_date": "2026-08-29",
      "note": "Manufacturer coverage row. Enter a current local bag price; the manufacturer calculator's sample price is not treated as a retail quote."
    }
  ],
  "conversion": {
    "r_us_to_r_si": 0.1761101838,
    "u_us_to_u_si": 5.678263337
  },
  "reuse": "ENERGY STAR table rows are attributed to their public source. Manufacturer and retailer facts remain attributed and are not relicensed. Inzonex original calculations, field dictionary, derived charts and normalized CSV files may be reused with attribution."
}