R-value

The typical R-value of spray cellulose insulation ranges from 3.5 to 3.8 per inch depending on the manufacturer. See Fig. 9.4 for one manufacturer’s coverage specification sheet.

Limitations

Wet-spray cellulose for residential application is limited to enclosed or covered applications.

COCOON STABILIZED INSULATION

ATOMIZED PNEUMATIC APPLICATION

COVERAGE CHART

R-Value at 75 F Mean Temperature

Net Coverage No Adjustment for Trusses

Minimum

Thickness

Maxiumum

Net

Coverage

Minimum Weight Per Square Foot

To Obtain an Insulation Resistance (R) of

Installed Insulation Should Not Be Less Than: (inches)

Square Feet Per Bag

Minimum Bags Required Per 1,000 Square Feet

Wt./ Sq. Ft. of Installed Insulation Shouldn’t Be

Less Than: (lbs)

R-50

13.5

20.5

48.8

1.464

R-42

11.4

24.4

41.0

1.230

R-40

10.8

25.6

39.0

1.172

R-38

10.3

27.0

37.1

1.113

R-32

8.6

32.0

34.1

.937

R-30

8.1

34.2

29.3

.878

R-24

6.5

42.7

23.4

.703

R-22

5.9

46.6

21.5

.644

R-19

5.1

53.9

18.5

.556

R-13

3.5

78.8

12.7

.381

R-11

3.0

93.1

10.7

.322

Sidewalls (Wall Spray)

R-13 (2×4)

3.5

51.4

19.4

.583

R-20 (2 x 6)

5.5

32.7

30.6

.917

NOTE: The above coverage figures compensate for settling and are for estimating purposes only. To achieve stated R-Value do not exceed minimum square feet coverage per bag. Actual coverage will be influenced by job conditions and application techniques. This product is intended for spray applied application. This coverage chart does not apply to dry loose fill application.

Figure 9.4 Coverage chart. (Greenstone)