Total U UA Cost* ∆$ Total U UA Cost* ∆$ 22 0.0607 56.10 1,756.07 $ — 0.0565 88.63 3,038.74 $ — 30 0.0446 41.22 2,165.37 $ 409.30 $ 0.0432 67.75 3,684.88 $ 646.14 $ 38 0.0367 33.88 2,537.24 $ 371.87 $ 0.0361 56.65 4,201.84 $ 516.96 $ 38 (XPS) 0.0367 33.88 2,664.12 $ 498.75 $ 0.0361 56.65 4,384.58 $ 699.70 $

Total U UA Cost* ∆$ Total U UA Cost* ∆$ 11 0.1025 107.93 1,292.00 $ — 0.1025 106.19 1,271.14 $ — 13 0.0943 99.25 1,353.86 $ 61.86 $ 0.0943 97.64 1,332.00 $ 60.86 $ 19 0.0680 71.60 1,902.79 $ 548.93 $ 0.0680 70.45 1,872.07 $ 540.07 $ 21 HD 0.0628 66.08 2,029.92 $ 127.13 $ 0.0628 65.01 1,997.15 $ 125.08 $ 13+5 0.0613 64.50 2,815.69 $ 785.77 $ 0.0613 63.46 2,782.76 $ 785.61 $ 21 HD+5 0.0458 48.17 3,491.75 $ 676.06 $ 0.0458 47.40 3,447.90 $ 665.15 $

Total U UA Cost* ∆$ Total U UA Cost* ∆$ 11 0.0891 82.31 903.95 $

— 0.0891 139.69 1,454.17 $

— 13‡ 0.0776 71.69 945.81 $ 41.86 $ 0.0776 121.66 1,525.21 $ 71.03 $ 19 0.0560 51.72 1,020.06 $ 74.25 $ 0.0560 87.77 1,651.20 $ 126.00 $ 22 0.0491 45.36 1,143.68 $ 123.63 $ 0.0491 76.97 1,861.00 $ 209.79 $ 30 0.0322 29.75 1,512.01 $ 368.32 $ 0.0322 50.49 2,459.43 $ 598.43 $ 30 (XPS) 0.0322 29.75 1,660.09 $ 516.40 $ 0.0322 50.49 2,616.27 $ 755.27 $ 38 (XPS) 0.0270 24.98 1,815.73 $ 303.72 $ 0.0270 42.40 2,880.39 $ 420.96 $ ‡ Cost for R-13 blanket extrapolated

Cost* ∆$ Cost* ∆$
1.08 0.70 1,362.64 $ — 2,307.89 $ —

0.50 0.60 2,312.57 $ 949.94 $ 3,916.79 $ 1,608.90 $

0.49 0.71 2,402.93 $ 90.35 $ 4,069.82 $ 153.03 $

0.35 0.33 2,717.95 $ 315.02 $ 4,603.37 $ 533.54 $

0.32 0.33 2,796.09 $ 78.14 $ 4,735.72 $ 132.35 $

0.35 0.25 2,808.30 $ 12.21 $ 4,756.40 $ 20.68 $

0.31 0.25 2,881.56 $ 73.26 $ 4,880.48 $ 124.08 $

0.31 0.31 3,235.65 $ 354.09 $ 5,480.20 $ 599.72 $

0.30 0.25 3,308.91 $ 73.26 $ 5,604.28 $ 124.08 $

*Cost of materials to the consumer ∆$ Incremental cost Vinyl Frame with Enhanced Low-E Dual Glazing

Vinyl Frame with Low-E Dual Glazing + Argon + Enhanced Glass Spacer Vinyl Frame with Enhanced Low-E Dual Glazing + Argon

Vinyl Frame with Enhanced Low-E Dual Glazing + Argon + Enhanced Glass Spacer WINDOW SUMMARY

Aluminum Frame with Clear Single Glazing + Storm Vinyl Frame with Clear Dual Glazing

Vinyl Frame with Low-E Dual Glazing Vinyl Frame with Low-E Dual Glazing + Argon Description SHGC U-value Single Double
Aluminum Frame with Clear Single Glazing CEILING SUMMARY

FLOOR SUMMARY

R Double Single R Single Double

WALL SUMMARY

R Double Single

### Prototype Home Characteristics SINGLE DOUBLE Home Size 14x66 28x56 Perimeter (ft) 160 168 Wall Height (ft) 7.5 7.5 Gross Wall Area (ft2) 1200 1260

Opaque wall area (ft2) 1053 1036 Window area (ft2) 111 188 12% of floor area Door area (ft 2) 36 36 Ceiling Area (ft2) 924 1568 Floor Area (ft2) 924 1568 Total Envelope Area 3048 4396R-22 Fraction of ceiling with reduced insulation thickness 25.45% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 4.47% 1.5% 67.09% 22.9% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.675 Blown Fiberglass Insulation R-value 0 17.35 Variable 22 Variable $ 275.16 Total path R-value 3.555 20.905 9.79 23.675 13.14 Path U-factor 0.281 0.048 0.102 0.042 0.076 Truss 16" o.c. 2.5" heel, 23.5" ridge $ 1,295.91 Other materials costs $ 184.99 OVERALL CEILING U-value 0.0607 UA ceiling 56.10 CEILING COST $ 1,756.07

R-30 Fraction of ceiling with reduced insulation thickness 23.55% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 4.59% 1.4% 68.81% 21.2% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.675 Blown Fiberglass Insulation R-value 0 25.35 Variable 30 Variable $ 342.10 Total path R-value 3.555 28.905 19.81 31.675 22.71 Path U-factor 0.281 0.035 0.050 0.032 0.044 Truss 16" o.c. 5.5" heel, 26.5" ridge $ 1,527.79 Other materials costs $ 295.48 OVERALL CEILING U-value 0.0446 UA ceiling 41.22 CEILING COST $ 2,165.37

R-38 (dense pack at eaves) Fraction of ceiling with reduced insulation thickness 26.18% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 4.43% 1.6% 66.44% 23.6% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.675 Blown Fiberglass Insulation R-value 0 33.35 Variable 38 Variable $ 504.47 Total path R-value 3.555 36.905 29.54 39.675 33.97 Path U-factor 0.281 0.027 0.034 0.025 0.029 Truss 16" o.c. 7.5" heel, 28.5" ridge $ 1,643.73 Other materials costs $ 389.04 OVERALL CEILING U-value 0.0367 UA ceiling 33.88 CEILING COST $ 2,537.24 Foam sheathing related costs $ 126.89 CEILING COST (XPS) $ 2,664.12 SINGLE-SECTION

At Trusses (Bottom Chord) Between Trusses

At Trusses (Bottom Chord) Between Trusses

At Trusses (Bottom Chord) Between TrussesR-22 Fraction of ceiling with reduced insulation thickness 13.02% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 5.22% 0.8% 78.28% 11.7% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.675 Blown Fiberglass Insulation R-value 0 17.35 Variable 22 Variable $ 490.83 Total path R-value 3.555 20.905 9.79 23.675 13.14 Path U-factor 0.281 0.048 0.102 0.042 0.076 Truss 16" o.c. 2.5" heel, 44.5" ridge $ 2,334.73 Other materials costs $ 213.18 OVERALL CEILING U-value 0.0565 UA ceiling 88.63 CEILING COST $ 3,038.74

R-30 Fraction of ceiling with reduced insulation thickness 12.05% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 5.28% 0.7% 79.16% 10.8% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.675 Blown Fiberglass Insulation R-value 0 25.35 Variable 30 Variable $ 639.57 Total path R-value 3.555 28.905 19.81 31.675 22.71 Path U-factor 0.281 0.035 0.050 0.032 0.044 Truss 16" o.c. 5.5" heel, 47.5" ridge $ 2,733.31 Other materials costs $ 312.00 OVERALL CEILING U-value 0.0432 UA ceiling 67.75 CEILING COST $ 3,684.88

R-38 (dense pack at eaves) Fraction of ceiling with reduced insulation thickness 13.40% Description Cost Insulation coverage None Full Partial Full Partial Percent of ceiling area 4.00% 5.20% 0.8% 77.94% 12.1% R-value of non-insulation materials 3.555 3.555 3.555 1.675 1.49 Blown Fiberglass Insulation R-value 0 33.35 Variable 38 Variable $ 876.36 Total path R-value 3.555 36.905 29.54 39.675 33.97 Path U-factor 0.281 0.027 0.034 0.025 0.029 Truss 16" o.c. 7.5" heel, 49.5" ridge $ 2,932.60 Other materials costs $ 392.89 OVERALL CEILING U-value 0.0361 UA ceiling 56.65 CEILING COST $ 4,201.84 Foam sheathing related costs $ 182.74 CEILING COST (XPS) $ 4,384.58 DOUBLE-SECTION

At Trusses (Bottom Chord) Between Trusses At Trusses (Bottom Chord) Between Trusses

At Trusses (Bottom Chord) Between Trusses

### Frame Insulation Fraction of wall 25% 75% Constant R-value 1.505 1.505

R-11 Description Frame Insulation Cost Cost 2” × 4” 16" o.c. wood stud 4.375 0 1,084.55 $ 1,067.05$ R-11 fiberglass batt 0 11 207.45 $ 204.10 $ Path R-value 5.88 12.505 Path U-value 0.17 0.08 OPAQUE WALL U-value 0.1025 UA wall 107.93 106.19

OPAQUE WALL COST $1,292.00 $1,271.14

R-13 Description Frame Insulation Cost Cost 2” × 4” 16" o.c. wood stud 4.375 0 1,084.55 $ 1,067.05$ R-13 fiberglass batt 0 13 269.30 $ 264.96 $ Path R-value 5.88 14.505 Path U-value 0.17 0.069 OPAQUE WALL U-value 0.0943 UA wall 99.25 97.64

OPAQUE WALL COST $1,353.86 $1,332.00

R-19 Description Frame Insulation Cost Cost 2” × 6” 16" o.c. wood stud 6.875 0 1,550.38 $ 1,525.35$ R-19 fiberglass batt 0 18 352.41 $ 346.72 $ Path R-value 8.38 19.505 Path U-value 0.119 0.051 OPAQUE WALL U-value 0.0680 UA wall 71.60 70.45

OPAQUE WALL COST $1,902.79 $1,872.07

R-21 HD (High Density) Description Frame Insulation Cost Cost 2” × 6” 16" o.c. wood stud 6.875 0 1,550.38 $ 1,525.35$ R-21 HD fiberglass batt 0 21 479.54 $ 471.79 $ Path R-value 8.38 22.505 Path U-value 0.119 0.044 OPAQUE WALL U-value 0.0628 UA wall 66.08 65.01

OPAQUE WALL COST $2,029.92 $1,997.15 SINGLE DOUBLE

SINGLE DOUBLE SINGLE DOUBLE

SINGLE DOUBLE

### Frame Insulation Fraction of wall 25% 75% Constant R-value 1.505 1.505

R-13 + R-5/inch 1" XPS Description Frame Insulation Cost Cost 2” × 4” 16" o.c. wood stud 4.35 0 1,084.55 $ 1,067.05$ R-13 fiberglass batt 0 13 269.30 $ 264.96 $ R-5/inch 1" XPS (incl. fasteners) 5 5 1,461.83 $ 1,450.76$ Path R-value 10.855 19.505 Path U-value 0.092 0.051 OPAQUE WALL U-value 0.0613 UA wall 64.50 63.46

OPAQUE WALL COST $2,815.69 $2,782.76

R-21 HD + R-5/inch 1" XPS Description Frame Insulation Cost Cost 2” × 6” 16" o.c. wood stud 6.875 0 1,550.38 $ 1,525.35$ R-21 HD fiberglass batt 0 21 479.54 $ 471.79 $ R-5/inch 1" XPS (incl. fasteners) 5 5 1,461.83 $ 1,450.76$ Path R-value 13.38 27.505 Path U-value 0.075 0.036 OPAQUE WALL U-value 0.0458 UA wall 48.17 47.40

OPAQUE WALL COST $3,491.75 $3,447.90 SINGLE DOUBLE SINGLE DOUBLER-11 (blanket) heated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 0.00% 5.00% 50.00% 45.00% Constant R-value 1.84 1.84 1.84 R-11 Roll insulation 2.75 11 9.625 239.73 $ 406.82 $ Floor j oists ( 2×6 ) 0 00 538.05 $ 913.06 $ Path R-value 4.59 12.84 11.465 Path U-value 0.2179 0.0779 0.0872 Other materials costs 126.16 $ 134.29 $ FLOOR U-value 0.0891 UA Floor 82.31 139.69

FLOOR COST $ 903.95 $ 1,454.17

R-13 (blanket) heated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 0.00% 5.00% 50.00% 45.00% Constant R-value 0 1.84 1.84 1.84 R-13 Roll insulation 3.25 13 11.375 281.59 $ 477.86 $ Floor j oists ( 2×6 ) 0 00 538.05 $ 913.06 $ Path R-value 5.09 14.84 13.215 Path U-value 0.1965 0.0674 0.0757 Other materials costs 126.16 $ 134.29 $ FLOOR U-value 0.0776 UA Floor 71.69 121.66

FLOOR COST $ 945.81 $ 1,525.21

R-19 (blanket) heated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 0.00% 5.00% 50.00% 45.00% Constant R-value 0 1.84 1.84 1.84 R-19 Roll insulation 4.75 19 16.625 355.84 $ 603.85 $ Floor j oists ( 2×6 ) 0 00 538.05 $ 913.06 $ Path R-value 6.59 20.84 18.465 Path U-value 0.1517 0.048 0.0542 Other materials costs 126.16 $ 134.29 $ FLOOR U-value 0.0560 UA Floor 51.72 87.77

FLOOR COST $ 1,020.06 $ 1,651.20

R-22 (blanket) heated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 0.00% 5.00% 50.00% 45.00% Constant R-value 1.84 1.84 1.84 R-11 Roll insulation (x2 ) 5.5 22 19.25 479.47 $ 813.65 $ Floor j oists ( 2×6 ) 0 00 538.05 $ 913.06 $ Path R-value 7.34 23.84 21.09 Path U-value 0.1362 0.0419 0.0474 Other materials costs 126.16 $ 134.29 $ FLOOR U-value 0.0491 UA Floor 45.36 76.97

FLOOR COST $ 1,143.68 $ 1,861.00 Non-Frame Frame

Insulation

SINGLE DOUBLE Insulation Insulation Insulation Insulation SINGLE DOUBLE Insulation Insulation SINGLE DOUBLE

DOUBLE SINGLE InsulationR-30 (batt + blanket) unheated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 5.00% 5.00% 45.00% 45.00% Constant R-value 3.66 3.66 3.66 3.66 R-11 Roll insulation 11 2.75 11 9.625 239.73 $ 406.82 $ Floor j oists ( 2×8 ) 9.38 9.38 0 0 742.73 $ 1,260.39 $ Air sp ace above roll 1.14 0 1.14 0 R-19 Batt insulation 0 0 19 17.67 361.33 $ 613.17 $ Air sp ace above batt 0 0 1.14 0 Path R-value 25.175 15.785 35.94 30.955 Path U-value 0.0397 0.0634 0.0278 0.0323 Other materials costs 168.21 $ 179.06 $ FLOOR U-value 0.0322 UA Floor 29.75 50.49

FLOOR COST $ 1,512.01 $ 2,459.43 Foam sheathing related costs $ 148.08 $ 156.84 FLOOR COST (XPS) $ 1,660.09 $ 2,616.27

R-38 (batt + blanket) unheated sub f

loo r Full Partial Full Partial Cost Cost Fraction of floor area 5.00% 5.00% 45.00% 45.00% Constant R-value 3.66 3.66 3.66 3.66 R-19 Roll insulation 19 4.75 19 16.625 395.38 $ 670.95 $ Floor j oists ( 2×8 ) 9.38 9.38 0 0 742.73 $ 1,260.39 $ Air sp ace above roll 1.14 0 1.14 0 R-19 Batt insulation 0 0 19 15.77 361.33 $ 613.17 $ Air sp ace above batt 0 0 1.14 0 Path R-value 33.175 17.785 43.94 36.055 Path U-value 0.0301 0.0562 0.0228 0.0277 Other materials costs 168.21 $ 179.06 $ Foam sheathing related costs $ 148.08 $ 156.84 FLOOR U-value 0.0270 UA Floor 24.98 42.40 FLOOR COST (XPS) $ 1,815.73 $ 2,880.39 Frame Non-Frame

Insulation Insulation SINGLE DOUBLE

Insulation Insulation SINGLE DOUBLE