Masonry Magazine October 1986 Page. 23
TABLE 6 R-Values
Walls Constructed of 12" Hollow C.M.U.
Density, lb/cu. ft.
Details of Construction
60
80
100
120
140
(1) No Insulation
3.9
3.3
2.8
2.5
2.2
(2) Cores filled with Vermiculite
14.3
11.3
8.8
6.7
5.0
(3) Cores filled with Perlite
15.7
12.1
9.2
6.9
5.1
(4) No insul.. 1½" gypsum board on furring
5.3
4.7
4.2
3.9
3.6
(5) No insul., 1½" foil back gypsum board on furring
6.9
6.3
5.8
5.5
5.2
(6) Same as (4) w/1" Extruded Polystyrene
8.9
8.3
7.8
7.5
7.2
(7) Same as (4) w/2" Expanded Polystyrene
11.9
11.3
10.8
10.5
10.2
(8) Same as (4) w/2" Extruded Polystyrene
13.9
13.3
12.8
12.5
12.2
(9) Same as (4) w/2" Polyisocyanurate
18.3
17.7
17.2
16.9
16.6
(10) Same as (4) R-11 fibrous batt 2 x 3 studs set out from wall
14.9
14.3
13.8
13.5
13.2
(11) Same as (4) R-13 fibrous batt 2 x 3 studs set out from wall
16.9
16.3
15.8
15.5
15.2
(12) Same as (4) R-19 fibrous batt 2 x 4 studs set out from wall
22.9
22.2
21.8
21.5
21.2
TABLE 7 R-Values
4.2.4 Cavity Wall
Density, lb/cu. ft.
Details of Construction
60
80
100
120
140
(1) No Insulation
4.2
3.9
3.6
3.3
3.1
(2) Same as (1), plus ½" gypsum board on furring
5.7
5.3
5.0
4.7
4.5
(3) Same as (1), plus ½" foil back gypsum board on furring
7.2
6.9
6.6
6.3
6.1
(4) Cavity filled with Vermiculite
8.6
8.2
7.9
7.6
7.4
(5) Same as (4), plus ½" gypsum board on furring
10.0
9.6
9.3
9.1
8.8
(6) Same as (4), plus ½" foil back gypsum board on furring
11.6
11.2
10.9
10.6
10.4
(7) Cavity filled with Perlite
10.1
9.7
9.4
9.1
8.9
(8) Same as (7), plus ½" gypsum board on furring
11.5
11.1
10.8
10.6
10.4
(9) Same as (7), plus ½" foil back gypsum board on furring
13.1
12.7
12.4
12.1
11.9
(10) 1" Expanded Polystyrene Board in Cavity
8.2
7.9
7.6
7.3
7.1
(11) 1" Extruded Polystyrene Board in Cavity
9.2
8.9
8.6
8.3
8.1
(12) 1" Polyisocyanurate Board in Cavity
11.4
11.1
10.8
10.5
10.3