Z
o
n
e
|
Attic/
Ceiling
R-Value
|
Ext.
Wall*
R-Value
|
Floor
R-Value
|
Basement
Wall
R-Value
|
|
R-19
|
R-11
|
R-11
|
-
|
|
R-30
|
R-13
|
R-13
|
R-11
|
|
R-30
|
R-13
|
R-19
|
R-11
|
|
R-38
|
R-15
|
R-19
|
R-11
|
|
R-38
|
R-21
|
R-19
|
R-15
|
| Hawaii=Zone 1
|
|
Alaska=Zone 5
|
*For 2X4 wall cavities use R-11, R-13 or R-15. For 2X6 wall cavities use R-19 or R-21.
R-19 will actually yield an R-Value of R-17 because it must be slightly compressed to fit in the 2X6 construction.
|
|
