R-Value of Building Materials - Alaska Housing Finance ...
R-Value of Building Materials
Material
Insulation Materials Fiberglass Batt Fiberglass Blown (attic) Fiberglass Blown (wall) Rock Wool Batt Rock Wool Blown (attic) Rock Wool Blown (wall) Cellulose Blown (attic) Cellulose Blown (wall) Vermiculite Air-entrained Concrete Urea terpolymer foam Rigid fiberglass (> 4 lb/ft3) Expanded Polystyrene (bead-
board) Extruded Polystyrene Polyurethane (foamed-in-place) Polyisocyanurate (foil-faced) Construction Materials Concrete Block 4 inch Concrete Block 8 inch Concrete Block 12 inch Brick 4 inch common Brick 4 inch face Poured Concrete Soft Wood Lumber
2 inch nominal (1 / inch) 2 x 4 (3 / inch) 2 x 6 (5 / inch) Cedar Logs and Lumber Sheathing Materials Plywood / inch / inch / inch / inch / inch Fiberboard / inch / inch
R/ Inch
R/ Thick-
ness
3.14 2.20 3.20 3.14 3.10 3.03 3.13 3.70 2.13 3.90 4.48 4.00
4.00
5.00 6.25 7.20
0.80
1.11
1.28
0.80
0.44
0.08
1.25
1.88
4.38
6.88
1.33
1.25
0.31
0.47
0.63
0.77
0.94
2.64
1.32
2.06
Material
Fiberglass (/ inch) (1 inch) (1 / inch)
Extruded Polystyrene (/ inch) (1 inch) (1 / inch)
Foil-faced Polyisocyanurate (/ inch) (1 inch) (1 / inch)
Siding Materials Hardboard (/ inch) Plywood (/ inch) (/ inch) Wood Bevel Lapped Aluminum, Steel, Vinyl
(hollow backed) (w/ / inch Insulating board) Brick 4 inch
Interior Finish Materials Gypsum Board (drywall / inch)
(/ inch) Paneling (/ inch) Flooring Materials Plywood (/ inch) Particle Board (underlayment)
(/ inch) Hardwood Flooring (/ inch) Tile, Linoleum Carpet (fibrous pad) (rubber pad) Roofing Materials Asphalt Shingles Wood Shingles Windows Single Glass
w/storm Double insulating glass
(/ inch) air space (/ inch air space)
R/ Inch
1.25 1.31 0.91
R/ Thick-
ness 3.00 4.00 6.00 3.75 5.00 7.50
5.40
7.20 10.80
0.34 0.77 0.93 0.80
0.61
1.80 0.44
0.45 0.56 0.47
0.93 0.82 0.68 0.05 2.08 1.23
0.44 0.97
0.91 2.00
1.61
1.69
(/ inch air space)
2.04
(/ inch air space)
2.38
(/ inch w/ low-E 0.20)
3.13
(w/ suspended film)
2.77
(w/ 2 suspended films)
3.85
(w/ suspended film and low-E)
4.05
Triple insulating glass (/ inch air spaces)
2.56
(/ inch air spaces)
3.23
Addition for tight fitting drapes
0.29
or shades, or closed blinds
Doors
Wood Hollow Core Flush
(1 / inch)
Solid Core Flush (1 / inch)
Solid Core Flush (2 / inch)
Panel Door w/ / inch Panels
(1 / inch)
Storm Door (wood 50% glass)
(metal)
Metal Insulating
(2 inch w/ urethane)
Air Films
Interior Ceiling
Interior Wall
Exterior
Air Spaces
/ inch to 4 inch approximately
2.17 3.03 3.70 1.85 1.25 1.00 15.00
0.61 0.68 0.17
1.00
262
Appendix 1
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