"R" and "U" Values of Typical 12 inch Hollow Concrete Masonry Walls

Construction Cores
Empty		 Loose-Fill
Insulation		 Foamed-in-
Place
Insulation		 Grout Fill
100 lb./
cu. ft.		 Grout Fill
130 lb./ft.3		 Density 
of Block
lb./cu. ft.
R U R U R U R U R U
Exposed Block,
Both Sides		 3.24
2.91
2.73
2.57
2.39
2.23		 .31
.34
.37
.39
.42
.45		 13.02
11.00
  9.80
  8.71
  7.37
  6.11		 .08
.09
.10
.11
.14
.16

16.11
13.11
11.42
  9.94
  8.20
  6.65

 .06
.08
.09
.10
.12
.15		 4.58
4.17
3.93
3.71
3.44
3.16		 .22
.24
.25
.27
.29
.32		 3.49
3.14
2.95
2.79
2.60
2.42		 .29
.32
.34
.36
.38
.41		 80
95
105
115
125
135
1/2" Gypsum Board on Furring Strips 4.66
4.33
4.15
3.99
3.81
3.65		 .21
.23
.24
.25
.26
.27		 14.44
12.42
11.22
10.13
  8.79
  7.53		 .07
.08
.09
.10
.11
.13		 17.53
14.53
12.84
11.36
  9.62
  8.07		 .06
.07
.08
.09
.10
.12		 6.00
5.59
5.35
5.13
4.86
4.58		 .17
.18
.19
.19
.21
.22		 4.91
4.56
4.37
4.21
4.02
3.84		 .20
.22
.23
.24
.25
.26		 80
95
105
115
125
135
1/2" Foil-Backed Gypsum Board on Furring Strips 6.77
6.44
6.26
6.10
5.92
5.76		 .15
.16
.16
.16
.17
.17		 16.55
14.53
13.33
12.24
10.90
  9.64		 .06
.07
.08
.09
.10
.12		 19.64
16.64
14.95
13.47
11.73
10.18		 .05
.06
.07
.07
.09
.10		 8.11
7.70
7.46
7.24
6.97
6.69		 .12
.13
.13
.14
.14
.15		 7.02
6.67
6.48
6.32
6.13
5.95		 .14
.15
.15
.16
.16
.17		 80
95
105
115
125
135
1" Rigid Glass Fiber plus 1/2" Gypsum Board 7.69
7.36
7.18
7.02
6.84
6.68		 .13
.14
.14
.14
.15
.15		 17.47
15.45
14.25
13.16
11.82
10.56		 .06
.06
.07
.08
.08
.09		 20.56
17.56
15.87
14.39
12.65
11.10		 .05
.06
.06
.07
.08
.09		 9.03
8.62
8.38
8.16
7.89
7.61		 .11
.12
.12
.12
.13
.13		 7.94
7.59
7.40
7.24
7.05
6.87		 .13
.13
.14
.14
.14
.15		 80
95
105
115
125
135
1" Expanded Polystyrene plus 1/2" Gypsum Board 8.69
8.36
8.18
8.02
7.84
7.68		 .12
.12
.12
.12
.13
.13		 18.47
16.45
15.25
14.16
12.82
11.56		 .05
.06
.07
.07
.08
.09		 21.56
18.56
16.87
15.39
13.65
12.10		 .05
.05
.06
.06
.07
.08		 10.03
  9.62
  9.38
  9.16
  8.89
  8.61		 .10
.10
.11
.11
.11
.12		 8.94
8.59
8.40
8.24
8.05
7.87		 .11
.12
.12
.12
.12
.13		 80
95
105
115
125
135
1" Expanded Polyuthrethane plus 1/2" Gypsum Board 9.94
9.61
9.43
9.27
9.09
8.93		 .10
.10
.11
.11
.11
.11		 19.72
17.70
16.50
15.41
14.07
12.81		 .05
.06
.06
.06
.07
.08		 22.81
19.81
18.12
16.64
14.90
13.35		 .04
.05
.06
.06
.07
.07		 11.28
10.87
10.63
10.41
10.14
  9.86		 .09
.09
.09
.10
.10
.10		 10.19
9.84
9.65
9.49
9.30
9.12		 .10
.10
.10
.11
.11
.11		 80
95
105
115
125
135

As listed in the National Concrete Masonry Association Tech Sheet No.101