{
 "format": "takeoffcraft-pack",
 "version": 1,
 "id": "trade.insulation",
 "name": "Insulation",
 "packVersion": "0.1.0",
 "trade": "Insulation",
 "description": "Wall batts by height (R-13, R-21), blown-in attic R-49 with baffles and rulers, rigid foam board, closed-cell spray foam by board feet, polyethylene vapor retarder and sound batts. R-values follow your climate zone. Assemblies only: set your own rates.",
 "author": "CadCraft",
 "license": "CC0-1.0",
 "status": "starter",
 "homepage": "https://getcadcraft.com/addons?kind=pack",
 "csi": [
  "07 21 13",
  "07 21 16",
  "07 21 19",
  "07 21 26",
  "07 26 00"
 ],
 "sources": [
  {
   "id": "irc-n1102",
   "title": "International Residential Code, Section N1102 Building Thermal Envelope (insulation R-values by climate zone)",
   "edition": "2021",
   "publisher": "International Code Council",
   "url": "https://codes.iccsafe.org/"
  },
  {
   "id": "pds",
   "title": "The product data sheet of the coating, adhesive or product you specify (spread rate, coverage, coats)",
   "publisher": "its manufacturer"
  },
  {
   "id": "geometry",
   "title": "Plain geometry: the quantity follows from the measured length, height or area and the stated module (no outside source needed)"
  },
  {
   "id": "irc-r806",
   "title": "International Residential Code, Section R806 Roof Ventilation",
   "edition": "2021",
   "publisher": "International Code Council",
   "url": "https://codes.iccsafe.org/"
  }
 ],
 "items": [
  {
   "key": "batt-r13-8",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 2x4 at 16 in o.c., 8 ft",
   "unit": "LF",
   "twin": "batt-r13-8-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 8
  },
  {
   "key": "batt-r13-8-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 38 x 89 mm at 406 mm o.c., 2.44 m",
   "unit": "m",
   "twin": "batt-r13-8",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 8.00524934383202
  },
  {
   "key": "batt-r13-9",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 2x4 at 16 in o.c., 9 ft",
   "unit": "LF",
   "twin": "batt-r13-9-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 9
  },
  {
   "key": "batt-r13-9-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 38 x 89 mm at 406 mm o.c., 2.74 m",
   "unit": "m",
   "twin": "batt-r13-9",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 8.989501312335959
  },
  {
   "key": "batt-r13-10",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 2x4 at 16 in o.c., 10 ft",
   "unit": "LF",
   "twin": "batt-r13-10-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 10
  },
  {
   "key": "batt-r13-10-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-13, 38 x 89 mm at 406 mm o.c., 3.05 m",
   "unit": "m",
   "twin": "batt-r13-10",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 10.006561679790025
  },
  {
   "key": "batt-r21-8",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 2x6 at 16 in o.c., 8 ft",
   "unit": "LF",
   "twin": "batt-r21-8-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 8
  },
  {
   "key": "batt-r21-8-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 38 x 140 mm at 406 mm o.c., 2.44 m",
   "unit": "m",
   "twin": "batt-r21-8",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 8.00524934383202
  },
  {
   "key": "batt-r21-9",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 2x6 at 16 in o.c., 9 ft",
   "unit": "LF",
   "twin": "batt-r21-9-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 9
  },
  {
   "key": "batt-r21-9-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 38 x 140 mm at 406 mm o.c., 2.74 m",
   "unit": "m",
   "twin": "batt-r21-9",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 8.989501312335959
  },
  {
   "key": "batt-r21-10",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 2x6 at 16 in o.c., 10 ft",
   "unit": "LF",
   "twin": "batt-r21-10-m",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/40)",
     "waste": 500
    }
   ],
   "heightFt": 10
  },
  {
   "key": "batt-r21-10-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Batts on the gross wall area (A = run x height), no deduction for studs and plates (they offset the cutting waste); 5% waste.",
    "Packages by the coverage printed on the bag: change the SF per package (40 here) to yours."
   ],
   "note": "Draw exterior wall runs; the item height is the wall height. Leave openings as deducts.",
   "waste": 0,
   "name": "Wall batts R-21, 38 x 140 mm at 406 mm o.c., 3.05 m",
   "unit": "m",
   "twin": "batt-r21-10",
   "components": [
    {
     "name": "Batt insulation",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    },
    {
     "name": "Batt packages",
     "unit": "EA",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    }
   ],
   "heightFt": 10.006561679790025
  },
  {
   "key": "blown-r49",
   "type": "area",
   "csi": "07 21 26",
   "group": "Attics",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Loose-fill cellulose at about R-3.7 per inch: R-49 is about 13.25 in settled (use the bag chart’s thickness for your product).",
    "Bags: about 1 per 40 SF at R-49 (a starting figure: read the bag chart for \"bags per 1,000 SF\").",
    "Attic rulers: one per 300 SF.",
    "Baffles at each rafter bay along the eaves are counted as their own run."
   ],
   "note": "Measure the attic floor area.",
   "waste": 0,
   "name": "Blown-in attic insulation R-49",
   "unit": "SF",
   "twin": "blown-r49-m",
   "components": [
    {
     "name": "Loose-fill insulation bags",
     "unit": "bag",
     "formula": "ceil(A/40)",
     "waste": 500
    },
    {
     "name": "Attic rulers",
     "unit": "EA",
     "formula": "ceil(A/300)",
     "waste": 0
    }
   ]
  },
  {
   "key": "blown-r49-m",
   "type": "area",
   "csi": "07 21 26",
   "group": "Attics",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Loose-fill cellulose at about R-3.7 per inch: R-49 is about 13.25 in settled (use the bag chart’s thickness for your product).",
    "Bags: about 1 per 40 SF at R-49 (a starting figure: read the bag chart for \"bags per 1,000 SF\").",
    "Attic rulers: one per 300 SF.",
    "Baffles at each rafter bay along the eaves are counted as their own run."
   ],
   "note": "Measure the attic floor area.",
   "waste": 0,
   "name": "Blown-in attic insulation R-49 (RSI-8.6)",
   "unit": "m²",
   "twin": "blown-r49",
   "components": [
    {
     "name": "Loose-fill insulation bags",
     "unit": "bag",
     "formula": "ceil(A/3.7161)",
     "waste": 500
    },
    {
     "name": "Attic rulers",
     "unit": "EA",
     "formula": "ceil(A/27.871)",
     "waste": 0
    }
   ]
  },
  {
   "key": "baffles",
   "type": "linear",
   "csi": "07 21 26",
   "group": "Attics",
   "sources": [
    "irc-r806",
    "geometry"
   ],
   "assume": [
    "One baffle per rafter bay, rafters 24 in o.c.: 0.5 per LF of eave."
   ],
   "note": "Measure along the eaves.",
   "waste": 0,
   "name": "Rafter vent baffles at eaves, rafters 24 in o.c.",
   "unit": "LF",
   "twin": "baffles-m",
   "components": [
    {
     "name": "Vent baffles",
     "unit": "EA",
     "formula": "ceil(L/2)+N",
     "waste": 500
    }
   ]
  },
  {
   "key": "baffles-m",
   "type": "linear",
   "csi": "07 21 26",
   "group": "Attics",
   "sources": [
    "irc-r806",
    "geometry"
   ],
   "assume": [
    "One baffle per rafter bay, rafters 24 in o.c.: 0.5 per LF of eave."
   ],
   "note": "Measure along the eaves.",
   "waste": 0,
   "name": "Rafter vent baffles at eaves, rafters 610 mm o.c.",
   "unit": "m",
   "twin": "baffles",
   "components": [
    {
     "name": "Vent baffles",
     "unit": "EA",
     "formula": "ceil(L/0.6096)+N",
     "waste": 500
    }
   ]
  },
  {
   "key": "board-1",
   "type": "area",
   "csi": "07 21 13",
   "group": "Board",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Boards 4 x 8 ft (32 SF), 5% waste.",
    "Cap fasteners about 1 per 2 SF where the board is mechanically fastened (a starting figure)."
   ],
   "note": "Measure the insulated wall or foundation area.",
   "waste": 0,
   "name": "Rigid foam board 1 in, 4 x 8 ft",
   "unit": "SF",
   "twin": "board-1-m",
   "components": [
    {
     "name": "Foam board 1 in, 4 x 8 ft",
     "unit": "board",
     "formula": "ceil(A/32)",
     "waste": 500
    },
    {
     "name": "Cap fasteners",
     "unit": "EA",
     "formula": "ceil(A/2)",
     "waste": 500
    }
   ]
  },
  {
   "key": "board-1-m",
   "type": "area",
   "csi": "07 21 13",
   "group": "Board",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Boards 4 x 8 ft (32 SF), 5% waste.",
    "Cap fasteners about 1 per 2 SF where the board is mechanically fastened (a starting figure)."
   ],
   "note": "Measure the insulated wall or foundation area.",
   "waste": 0,
   "name": "Rigid foam board 25 mm, 1220 x 2440 mm",
   "unit": "m²",
   "twin": "board-1",
   "components": [
    {
     "name": "Foam board 25 mm, 1220 x 2440 mm",
     "unit": "board",
     "formula": "ceil(A/2.9768)",
     "waste": 500
    },
    {
     "name": "Cap fasteners",
     "unit": "EA",
     "formula": "ceil(A/0.1858)",
     "waste": 500
    }
   ]
  },
  {
   "key": "board-2",
   "type": "area",
   "csi": "07 21 13",
   "group": "Board",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Boards 4 x 8 ft (32 SF), 5% waste.",
    "Cap fasteners about 1 per 2 SF where the board is mechanically fastened (a starting figure)."
   ],
   "note": "Measure the insulated wall or foundation area.",
   "waste": 0,
   "name": "Rigid foam board 2 in, 4 x 8 ft",
   "unit": "SF",
   "twin": "board-2-m",
   "components": [
    {
     "name": "Foam board 2 in, 4 x 8 ft",
     "unit": "board",
     "formula": "ceil(A/32)",
     "waste": 500
    },
    {
     "name": "Cap fasteners",
     "unit": "EA",
     "formula": "ceil(A/2)",
     "waste": 500
    }
   ]
  },
  {
   "key": "board-2-m",
   "type": "area",
   "csi": "07 21 13",
   "group": "Board",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "R-value by climate zone: IRC Table N1102.1.2 (IECC R402.1.2); choose the product that meets it.",
    "Boards 4 x 8 ft (32 SF), 5% waste.",
    "Cap fasteners about 1 per 2 SF where the board is mechanically fastened (a starting figure)."
   ],
   "note": "Measure the insulated wall or foundation area.",
   "waste": 0,
   "name": "Rigid foam board 51 mm, 1220 x 2440 mm",
   "unit": "m²",
   "twin": "board-2",
   "components": [
    {
     "name": "Foam board 51 mm, 1220 x 2440 mm",
     "unit": "board",
     "formula": "ceil(A/2.9768)",
     "waste": 500
    },
    {
     "name": "Cap fasteners",
     "unit": "EA",
     "formula": "ceil(A/0.1858)",
     "waste": 500
    }
   ]
  },
  {
   "key": "spf-cc-2",
   "type": "area",
   "csi": "07 21 19",
   "group": "Spray foam",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "Closed-cell spray foam 2 in: board feet = area x thickness in inches (metric: m³ = m² x 0.0508).",
    "Yield per set is the maker’s (it drops with temperature): add your own allowance as waste."
   ],
   "note": "Measure the sprayed area.",
   "waste": 0,
   "name": "Closed-cell spray foam, 2 in",
   "unit": "SF",
   "twin": "spf-cc-2-m",
   "components": [
    {
     "name": "Spray foam",
     "unit": "BF",
     "formula": "A*2",
     "waste": 1000
    }
   ]
  },
  {
   "key": "spf-cc-2-m",
   "type": "area",
   "csi": "07 21 19",
   "group": "Spray foam",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "Closed-cell spray foam 2 in: board feet = area x thickness in inches (metric: m³ = m² x 0.0508).",
    "Yield per set is the maker’s (it drops with temperature): add your own allowance as waste."
   ],
   "note": "Measure the sprayed area.",
   "waste": 0,
   "name": "Closed-cell spray foam, 51 mm",
   "unit": "m²",
   "twin": "spf-cc-2",
   "components": [
    {
     "name": "Spray foam",
     "unit": "m³",
     "formula": "A*0.0508",
     "waste": 1000
    }
   ]
  },
  {
   "key": "vapor-poly",
   "type": "area",
   "csi": "07 26 00",
   "group": "Vapor retarders",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "6-mil polyethylene where the climate zone calls for a Class I vapor retarder (IRC R702.7); 10% for laps; acoustical sealant at the laps: one tube per 100 SF (a starting figure)."
   ],
   "note": "Measure the wall or ceiling area that gets the retarder.",
   "waste": 0,
   "name": "Polyethylene vapor retarder 6 mil",
   "unit": "SF",
   "twin": "vapor-poly-m",
   "components": [
    {
     "name": "Polyethylene 6 mil",
     "unit": "SF",
     "formula": "A",
     "waste": 1000
    },
    {
     "name": "Acoustical sealant tubes",
     "unit": "EA",
     "formula": "ceil(A/100)",
     "waste": 0
    }
   ]
  },
  {
   "key": "vapor-poly-m",
   "type": "area",
   "csi": "07 26 00",
   "group": "Vapor retarders",
   "sources": [
    "irc-n1102",
    "pds",
    "geometry"
   ],
   "assume": [
    "6-mil polyethylene where the climate zone calls for a Class I vapor retarder (IRC R702.7); 10% for laps; acoustical sealant at the laps: one tube per 100 SF (a starting figure)."
   ],
   "note": "Measure the wall or ceiling area that gets the retarder.",
   "waste": 0,
   "name": "Polyethylene vapor retarder 0.15 mm",
   "unit": "m²",
   "twin": "vapor-poly",
   "components": [
    {
     "name": "Polyethylene 6 mil",
     "unit": "m²",
     "formula": "A",
     "waste": 1000
    },
    {
     "name": "Acoustical sealant tubes",
     "unit": "EA",
     "formula": "ceil(A/9.2903)",
     "waste": 0
    }
   ]
  },
  {
   "key": "sound-8",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 3-1/2 in, 8 ft",
   "unit": "LF",
   "twin": "sound-8-m",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 8
  },
  {
   "key": "sound-8-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 89 mm, 2.44 m",
   "unit": "m",
   "twin": "sound-8",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 8.00524934383202
  },
  {
   "key": "sound-9",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 3-1/2 in, 9 ft",
   "unit": "LF",
   "twin": "sound-9-m",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 9
  },
  {
   "key": "sound-9-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 89 mm, 2.74 m",
   "unit": "m",
   "twin": "sound-9",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 8.989501312335959
  },
  {
   "key": "sound-10",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 3-1/2 in, 10 ft",
   "unit": "LF",
   "twin": "sound-10-m",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "SF",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 10
  },
  {
   "key": "sound-10-m",
   "type": "linear",
   "csi": "07 21 16",
   "group": "Walls",
   "sources": [
    "pds",
    "geometry"
   ],
   "assume": [
    "Sound attenuation batts 3-1/2 in in one side of the cavity, the gross partition area, 5% waste."
   ],
   "note": "Draw the partition runs; the item height is the wall height.",
   "waste": 0,
   "name": "Sound attenuation batts in partitions, 89 mm, 3.05 m",
   "unit": "m",
   "twin": "sound-10",
   "components": [
    {
     "name": "Sound attenuation batts",
     "unit": "m²",
     "formula": "A",
     "waste": 500
    }
   ],
   "heightFt": 10.006561679790025
  }
 ]
}