What is the R-value of cellulose?
R-3.2 to 3.8 per inch2
The R-value of loose fill cellulose is R-3.2 to 3.8 per inch2. Loose fill fiberglass has an R-value of R-2.2 to 2.7 per inch3. Achieving the desired R-value depends on both the depth of the insulation and its density.
What is the R-value of 12 inches of cellulose insulation?
Decode the R-values The number is presented per inch, so an R-value of 3.1 at 12 inches would provide an overall value of R-38.
What is the R-value of 4 inches of cellulose?
between 3.8 and 4.0 per inch
Loose-fill cellulose insulation offers an R-value of around 3.5 per inch of thickness, while densely packed cellulose boasts an R-value between 3.8 and 4.0 per inch.
What is the R-value of 16 inches of cellulose insulation?
Cellulose is not unusual in this regard. Like many insulation materials, it provides an R-value of approximately R-3.5 per inch of thickness.
How many inches of blown cellulose insulation is R38?
11.6”
Cellulose Chart
| R-Value | Min Thickness | Min Weight/Sq Ft |
|---|---|---|
| R44 | 13.4” | 1.44 |
| R38 | 11.6” | 1.21 |
| R30 | 9.3” | 0.93 |
| R19 | 6” | 0.54 |
How do you calculate cellulose insulation?
To determine how much cellulose insulation you need, take the square footage of the space and divide it by either the depth or the desired R-value.
How many inches is R30 cellulose?
Cellulose Chart
| R-Value | Min Thickness | Max Net Coverage / Bag |
|---|---|---|
| R49 | 15” | 13.3 |
| R44 | 13.4” | 15.1 |
| R38 | 11.6” | 18 |
| R30 | 9.3” | 23.4 |
How many inches of cellulose insulation is R30?
Simply stick a tape in the cellulose after it has been installed, and measure it. My com- pany calls eight inches an R-30 attic, and ten inches an R-38.
How do you calculate the R-value of blown insulation?
It will most likely be a fiberglass batt, so multiply the thickness in inches by 3.2 to find out the R-value (or the R-value might be visible on a product label). If the insulation is a foam board or sprayed-on foam, use any visible label information or multiply the thickness in inches by 5 to estimate the R-value.
How many inches of blown insulation is r60?
R 60: Thickness that oscillates between 19 and 22 inches. R 70: Thickness that oscillates between 22 and 25 inches.
How deep is R60 cellulose?
In temperate coastal areas such as Zone 3, attic insulation of at least R30 up to a maximum of R60 is recommended. For loose-fill cellulose, this translates to a total depth ranging from 8 inches up to 16 inches.
Does cellulose insulation lose R-value?
The dense volume of fiberglass insulation prevents settling. Cellulose insulation, unfortunately, is most likely to settle. Over time, the aeration in cellulose insulation will decrease. This settling will cause cellulose insulation to lose up to 20 percent of its R-value.
How thick is cellulose insulation for R60?
17 inches
The average recommended level is 17 inches of R60. In Zone 6, the average minimum requirement for attic insulation is 14 inches of R49 fill. The average recommended level is 17 inches of R60.
How many inches is r50 cellulose?
between 15 and 19 inches
R 50: Thickness that oscillates between 15 and 19 inches. R 60: Thickness that oscillates between 19 and 22 inches.
How many inches of insulation do I need for an R60?
17″
If you have approximately 6″ of existing insulation, you’ll need to add an additional 17″ to reach R-60. If you have approximately 10″ of existing insulation, you’ll need to add an additional 13″ to reach R-60. If you have no insulation, you’ll need 23″ to reach R-60.