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Insulation Comparisons - Page 2 |
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Page 2 of 2
R-Value Table
The following R-Value Table came from the web site:
http://www.allwallsystem.com/design/RValueTable.html
Insulation Values For Selected Materials
Use the R-value table below to help you determine the R-value of your wall or ceiling assemblies. To obtain a wall or ceiling assembly R-value you must add the r-values of the individual components together.
This method ‘Wall Assembly R-Value” gives incorrect results for MASS walls such as the All Wall System.
Example of error, as defined by ORNL research papers.
When compared to a 6” R-20 framed Wood Wall a Foam Block (ICF) wall performed with a 9% better Energy Savings.
A wall built like All Wall performed with an 18% better Energy Savings. (9% over the Foam Block walls) because of the concrete being in direct contact with the interior.
See ORNL’s report conclusions by clicking here. Oakridge National Laboratory
Example:
Wall Assembly R-Value Example:
|
Component
|
R-value
|
| Wall - Outside Air Film
|
0.17
|
| Siding - Wood Bevel
|
0.80
|
| Plywood Sheathing - 1/2"
|
0.63
|
| 3 1/2" Fiberglass Bat
|
11.00
|
| 1/2" Drywall
|
0.45
|
| Inside Air Film
|
0.68
|
|
Total Wall Assembly R-Value
|
13.73
|
R-Value Table
|
Material
|
R/
Inch
|
R/
Thickness
|
|
Insulation Materials
|
|
Fiberglass Bat
|
3.14
|
|
|
Fiberglass Blown (attic)
|
2.20
|
|
|
Fiberglass Blown (wall)
|
3.20
|
|
|
Rock Wool Bat
|
3.14
|
|
|
Rock Wool Blown (attic)
|
3.10
|
|
|
Rock Wool Blown (wall)
|
3.03
|
|
|
Cellulose Blown (attic)
|
3.13
|
|
|
Cellulose Blown (wall)
|
3.70
|
|
|
Vermiculite
|
2.13
|
|
|
Air-entrained Concrete
|
3.90
|
|
|
Urea terpolymer foam
|
4.48
|
|
|
Rigid Fiberglass (> 4lb/ft3)
|
4.00
|
|
|
Expanded Polystyrene (beadboard)
|
4.00
|
|
|
Extruded Polystyrene
|
5.00
|
|
|
Polyurethane (foamed-in-place)
|
6.25
|
|
|
Polyisocyanurate (foil-faced)
|
7.20
|
|
|
Construction Materials
|
|
Concrete Block 4"
|
|
0.80
|
|
Concrete Block 8"
|
|
1.11
|
|
Concrete Block 12"
|
|
1.28
|
|
Brick 4" common
|
|
0.80
|
|
Brick 4" face
|
|
0.44
|
|
Poured Concrete
|
0.08
|
|
|
Soft Wood Lumber
|
1.25
|
|
|
2" nominal (1 1/2")
|
|
1.88
|
|
2x4 (3 1/2")
|
|
4.38
|
|
2x6 (5 1/2")
|
|
6.88
|
|
Cedar Logs and Lumber
|
1.33
|
|
|
Sheathing Materials
|
|
Plywood
|
1.25
|
|
|
1/4"
|
|
0.31
|
|
3/8"
|
|
0.47
|
|
1/2"
|
|
0.63
|
|
5/8"
|
|
0.77
|
|
3/4"
|
|
0.94
|
|
Fiberboard
|
2.64
|
|
|
1/2"
|
|
1.32
|
|
25/32"
|
|
2.06
|
|
Fiberglass (3/4")
|
|
3.00
|
|
(1")
|
|
4.00
|
|
(1 1/2")
|
|
6.00
|
|
Extruded Polystyrene (3/4")
|
|
3.75
|
|
(1")
|
|
5.00
|
|
(1 1/2")
|
|
7.50
|
|
Foil-faced Polyisocyanurate
(3/4")
|
|
5.40
|
|
(1")
|
|
7.20
|
|
(1 1/2")
|
|
10.80
|
|
Siding Materials
|
|
Hardboard (1/2")
|
|
0.34
|
|
Plywood (5/8")
|
|
0.77
|
|
(3/4")
|
|
0.93
|
|
Wood Bevel Lapped
|
|
0.80
|
|
Aluminum, Steel, Vinyl
(hollow backed)
|
|
0.61
|
|
(w/ 1/2" Insulating board)
|
|
1.80
|
|
Brick 4"
|
|
0.44
|
|
Interior Finish Materials
|
|
Gypsum Board (drywall 1/2")
|
|
0.45
|
|
(5/8")
|
|
0.56
|
|
Paneling (3/8")
|
|
0.47
|
|
Flooring Materials
|
|
Plywood
|
1.25
|
|
|
(3/4")
|
|
0.93
|
|
Particle Board (underlayment)
|
1.31
|
|
|
(5/8")
|
|
0.82
|
|
Hardwood Flooring
|
0.91
|
|
|
(3/4")
|
|
0.68
|
|
Tile, Linoleum
|
|
0.05
|
|
Carpet (fibrous pad)
|
|
2.08
|
|
(rubber pad)
|
|
1.23
|
|
Roofing Materials
|
|
Asphalt Shingles
|
|
0.44
|
|
Wood Shingles
|
|
0.97
|
|
Windows
|
|
Single Glass
|
|
0.91
|
|
w/storm
|
|
2.00
|
|
Double insulating glass
(3/16") air space
|
|
1.61
|
|
(1/4" air space)
|
|
1.69
|
|
(1/2" air space)
|
|
2.04
|
|
(3/4" air space)
|
|
2.38
|
|
(1/2" 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
(1/4" air spaces)
|
|
2.56
|
|
(1/2" air spaces)
|
|
3.23
|
|
Addition for tight fitting drapes or shades, or closed blinds
|
|
0.29
|
|
Doors
|
|
Wood Hollow Core Flush
(1 3/4")
|
|
2.17
|
|
Solid Core Flush (1 3/4")
|
|
3.03
|
|
Solid Core Flush (2 1/4")
|
|
3.70
|
|
Panel Door w/ 7/16" Panels
(1 3/4")
|
|
1.85
|
|
Storm Door (wood 50% glass)
|
|
1.25
|
|
(metal)
|
|
1.00
|
|
Metal Insulating
(2" w/ urethane)
|
|
15.00
|
|
Air Films
|
|
Interior Ceiling
|
|
0.61
|
|
Interior Wall
|
|
0.68
|
|
Exterior
|
|
0.17
|
|
Air Spaces
|
|
1/2" to 4" approximately
|
|
1.00
|
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