Masonry Magazine July 1975 Page. 16
Table 3
CONSTRUCTION: 6" Hollow Concrete Block
Density of concrete used in block, lbs. per cu. ft.
Approximate weight of masonry, lbs, per sq. ft.
60 80 100 120 140
20 26 33 40 46
WALL DETAILS
"U" VALUE
(1) No insulation.
.32 .37 .42 .47 .59
(2) No insulation, " gypsum board on furring strips
.22 .24 .26 .28 .32
(3) No insulation, " foil backed gypsum board on furring strips
.15 .16 .17 .18 .19
(4) Loose-fill insulation in cores
.16 .18 .22 .26 .41
(5) Loose-fill insulation in cores, " gypsum board on furring strips
.13 .15 .17 .19 .26
(6) Loose-fill insulation in cores, %" foil backed gypsum board on furring strips
.10 .11 .12 .14 .17
(7) 1" rigid glass fiber insulation & ½" gypsum board applied direct to wall surface
.13 .14 .15 .15 .16
(8) 1" polystyrene insulation & ½" gypsum board applied direct to wall surface
.12 .12 .13 .13 .14
(9) 1" polyurethane insulation & ½" gypsum board applied direct to wall surface
.10 .11 .11 .11 .12
(10) Same as (7) plus cores filled with loose-fill insulation
.09 .10 .11 .12 .15
(11) Same as (8) plus cores filled with loose-fill insulation
.08 .09 .10 .11 .13
(12) Same as (9) plus cores filled with loose-fill insulation
.08 .08 .09 .10 .11
(13) R-7 blanket insulation, " gypsum board
.09 .10 .10 .10 .11
Table 4
CONSTRUCTION: 8" Hollow Concrete Block
Density of concrete used in block, lbs. per cu. ft.
Approximate weight of masonry, lbs, per sq. ft.
60 80 100 120 140
24 32 40 47 55
WALL DETAILS
"U" VALUE
(1) No insulation
.32 .34 .38 .43 .55
(2) No insulation, " gypsum board on furring strips
.21 .23 .25 .27 .31
(3) No insulation, ½" foil backed gypsum board on furring strips
.15 .15 .16 .17 .19
(4) Loose-fill insulation in cores
.12 .14 .18 .21 .35
(5) Loose-fill insulation in cores, ½" gypsum board on furring strips
.10 .12 .14 .17 .24
(6) Loose-fill insulation in cores, " foil backed gypsum board on furring strips
.08 .10 .11 .12 .16
(7) 1" rigid glass fiber insulation & ½" gypsum board applied direct to wall surface
.14 .14 .15 .15 .17
(8) 1" polystyrene insulation & ½" gypsum board applied direct to wall surface
.12 .12 .12 .13 .14
(9) 1" polyurethane insulation & ½" gypsum board applied direct to wall surface
.10 .10 .11 .11 .12
(10) Same as (7) plus cores filled with loose-fill insulation
.08 .09 .10 .11 .14
(11) Same as (8) plus cores filled with loose-fill insulation
.07 .08 .09 .10 .12
(12) Same as (9) plus cores filled with loose-fill insulation
.07 .07 .08 .09 .11
(13) R-7 blanket insulation, " gypsum board
.09 .10 .10 .10 .11
Table 5
CONSTRUCTION: 12" Hollow Concrete Block
Density of concrete used in block, lbs, per cu, ft.
Approximate weight of masonry, Ibs. per sq. ft.
60 80 100 120 140
34 45 55 67 78
WALL DETAILS
"U" VALUE
(1) No insulation
.24 .29 .34 .38 .50
(2) No insulation, " gypsum board on furring strips
.18 .20 .23 .25 .29
(3) No insulation, " foil backed gypsum board on furring strips
.13 .14 .15 .16 .18
(4) Loose-fill insulation in cores
.08 .10 .13 .17 .29
(5) Loose-fill insulation in cores, ½" gypsum board on furring strips
.08 .09 .11 .13 .21
(6) Loose-fill insulation in cores, ½" foil backed gypsum board on furring strips
.07 .08 .09 .10 .14
(7) 1" rigid glass fiber insulation & ½" gypsum board applied direct to wall surface
.12 .13 .13 .14 .15
(8) 1" polystyrene insulation & ½" gypsum board applied direct to wall surface
.10 .11 .12 .12 .13
(9) 1" polyurethane insulation & ½" gypsum board applied direct to wall surface
.09 .10 .10 .11 .11
(10) Same as (7) plus cores filled with loose-fill insulation
.06 .07 .08 .10 .13
(11) Same as (8) plus cores filled with loose-fill insulation
.06 .07 .08 .09 .11
(12) Same as (9) plus cores filled with loose-fill insulation
.05 .06 .07 .08 .10
(13) R-7 blanket insulation, " gypsum board
.09 .09 .10 .10 .11