Masonry Magazine July 1975 Page. 18
Table 9
CONSTRUCTION: 12" Cavity Wall: 4" dense outer wythe, 2" air space, 6" hollow unit inner wythe
Density of concrete used in block, lbs. per cu. ft.
60 80 100 120 140
Approximate weight of masonry, lbs, per sq. ft.
58 64 71 78 84
WALL DETAILS
"U" VALUE
(1) No insulation
.22 .24 .26 .28 .32
(2) No insulation, ½" gypsum board on furring strips
.18 .18 .19 .20 .22
(3) No insulation, " foil backed gypsum board on furring strips
.13 .13 .14 .14 .15
(4) Loose-fill insulation in cavity
.13 .14 .15 .15 .16
(5) Loose-fill insulation in cavity, ½" gypsum board on furring strips
.11 .12 .12 .13 .13
(6) Loose-fill insulation in cavity, ½" foil backed gypsum board on furring strips
.09 .09 .10 .10 .10
(7) 1" rigid glass fiber insulation in cavity
.11 .12 .13 .13 .14
(8) 1" polystyrene insulation in cavity
.11 .11 .11 .12 .12
(9) 1" polyurethane insulation in cavity
.09 .10 .10 .10 .11
(10) Same as (7) plus ½" gypsum board on furring
.10 .11 .11 .11 .12
(11) Same as (8) plus ½" gypsum board on furring
.09 .10 .10 .10 .10
(12) Same as (9) plus ½" gypsum board on furring
.08 .09 .09 .09 .09
(13) Same as (7) plus %" foil backed gypsum board on furring
.08 .09 .09 .09 .09
(14) Same as (8) plus " foil backed gypsum board on furring
.07 .07 .07 .07 .08
(15) Same as (9) plus" foil backed gypsum board on furring
.06 .07 .07 .07 .07
(16) 2" rigid glass fiber insulation in cavity
.09 .09 .09 .09 .10
(17) 2" polystyrene insulation in cavity
.07 .08 .08 .08 .08
(18) 2" polyurethane insulation in cavity
.06 .06 .06 .06 .07
NATIONAL CONCRETE MASONRY ASSOCIATION
6845 Elm Street, McLean, Virginia 22101