Health considerations

Cellulose fiber is characterized as a nuisance dust but is not a health hazard. The fire retardants used in cellulose insulation are

30 lb. bag

PNEUMATIC APPLICATION COVERAGE CHART

R-Value at 75CF Mean Temperature

Minimum thickness

Net Coverage No Adjustment for Trusses

Gross Coverage Based on 2×6 Trusses on 16 Centers

Maximum Net Coverage

Minimum Weight Per Square Foot

To Obtain an Insulation Resistance fRi of

Installed Insulation Should Not Be Less Than (inches)

Thickness After Settling (inchest

Square Feet Per Bag

Minimum Bags Required Per 1.000 Square Feet

The Weight Per Square Foot of Installed Insulation Should Not Be Less Than (lbs )

Square Feet Per Bag

Bags Required Per 1.000 Square Feet

R-50

15.0

13.5

16.7

60.1

1.802

17.3

57.8

R-42

12.6

11.4

19.8

50.5

1.514

20.8

48.2

R-40

12.0

10.8

20.8

48.0

1.441

21.9

45.8

R-38

11.4

10.3

21.9

45.6

1.369

23.1

43.4

R-32

9.6

8.6

26.0

38.4

1.153

27.7

36.1

R-30

9.0

8.1

27.8

36.0

1.081

29.6

33.7

R-24

7.2

6.5

34.7

28.8

.865

37.7

26.5

R-22

6.6

5.9

37.8

26.4

.793

41.4

24.1

R-19

5.7

5.1

43.8

22.8

.685

48.3

20.7

R-13

3.9

3.5

64.0

15.6

.468

70.7

14.2

R-11

3.3

3.0

75.7

13.2

.396

83.5

12.0

Sidewalls (pressure filled-density 2.6 PPCF)

R-13 (2×4)

3.5

3.5

39.6

25.3

0.758

43.7

22.9

R-20 (2 x 6)

5.5

5.5

25.2

39.7

1.192

27.8

36.0

Figure 7.4 Typical manufacturer’s coverage chart. (Greenstone)

also regarded as nonhazardous. For example, the toxicity of boric acid is one-sixth that of table salt. Nevertheless, respiratory pro­tection should be worn while handling and installing the insulation material.