How to Install
First, determine the R-value recommended for your region. R-value indicates insulating power or thermal resistance (chart at left). Once you know your target R-value, refer to the GreenFiber Insulation coverage chart (on GreenFiber Insulation product bag or see charts below). This chart will indicate, for a 1,000-square-foot area, how many bags of GreenFiber Insulation you will need to purchase and how many inches of coverage you will need.
To calculate exactly how much GreenFiber Insulation you need for a specific number of square feet, you can use the following table provided by the U.S. Department of Energy Insulation Recommendations for Existing Houses.*
* These recommendations are cost-effective levels of insulation based on the best available information on local fuel and materials cost and weather conditions. Consequently, the levels may differ from current local building codes. In addition, the apparent fragmentation of the recommendations is an artifact of these data and should not be considered absolute minimum requirements.
| This is GreenFiber® Cellulose Loose-Fill Insulation click here to download coverage chart in PDF |
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| Application Coverage Chart | Product # INS551LD | ||||||
| R-Value @75°F Mean Temp | Minimum Thickness (inches) |
Maximum Net Coverage (No Adjustments for Framing) |
Gross Coverage (Based on 2"x6" Framing, 16" on centers) |
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| To Obtain a Thermal Resistance (R) of: | Installed Insulation Should Not Be Less Than | Thickness After Settling | Maximum Square Feet per Bag | Minimum Bags per 1,000 Square Feet | Minimum Weight (lbs.) per Square Foot | Maximum Square Feet per Bag | Minimum Bags per 1,000 Square Feet |
| R-13 | 4.1 | 3.7 | 55.4 | 18.0 | 0.407 | 61.1 | 16.4 |
| R-19 | 5.9 | 5.4 | 36.2 | 27.6 | 0.623 | 40.0 | 25.0 |
| R-22 | 6.9 | 6.2 | 30.7 | 32.6 | 0.734 | 33.5 | 29.8 |
| R-24 | 7.5 | 6.7 | 27.9 | 35.9 | 0.809 | 30.2 | 33.1 |
| R-25 | 7.8 | 7.0 | 26.6 | 37.6 | 0.847 | 28.7 | 34.8 |
| R-30 | 9.3 | 8.4 | 21.7 | 46.1 | 1.039 | 23.1 | 43.2 |
| R-38 | 11.7 | 10.5 | 16.6 | 60.1 | 1.355 | 17.5 | 57.1 |
| R-42 | 12.9 | 11.6 | 14.9 | 67.2 | 1.516 | 15.6 | 64.2 |
| R-49 | 15.0 | 13.5 | 12.5 | 79.9 | 1.802 | 13.0 | 76.8 |
| R-60 | 18.3 | 16.5 | 10.0 | 100.3 | 2.261 | 10.3 | 97.1 |
| The coverage chart is based on settled thickness, a nominal bag weight of 22.55 lbs and coverage based on the GreenFiber Monarch blowing machine. Settings are non adjustable. Use this chart for estimating purposes only. Job conditions, application techniques and settings on other equipment will influence actual coverage.
Do not add water to this product. |
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| Sidewalls | Wall Thickness | Thickness in Inches |
Maximum Coverage Sq. Feet Per Bag Coverage | Weight Per Square Foot |
|
| 16" oc | 24" oc | ||||
| R-13 | (2x4) | 3.5 | 32.8 | 31.7 | 1.02 |
| R-20 | (2x6) | 5.5 | 20.9 | 20.2 | 1.60 |
| Bag Weight: 22.55 lbs. | Attic Density Range: 1.32-1.65 lbs/cu ft. | Wall Density: 3.5 lbs/cu/ft. | |||
| Sample Calculation for 1,000 Sq. Ft. Attic | |||||
| Target R-Value |
Area Sq. Ft. |
/ | Sq. Ft/Bag From Chart |
= | Number of Bags Required |
| R-19 40 Sq. Ft. Bag |
1,000 Sq. Ft. | / | 40 Sq. Ft. Bag | = | 25 Bags |
| Your Calculation | |||||
Read This Before You Buy
What you should know about R-values
This chart shows the R-value of this insulation. R means resistance to heat flow. The higher the R-value, the greater the insulating power. Compare insulation R-values before you buy. There are other factors to consider. The amount of the insulation you need depends on the climate you live in. Also, your fuel savings from insulation will depend upon the climate, the type and size of your house, the amount of insulation already in your house, and your fuel use patterns and family size. If you buy too much insulation, it will cost you more than what you'll save on fuel. To get the marked R-value, it is essential that this insulation be installed properly.
To determine the amount of existing insulation you have, refer to the following chart from the Department of Energy found on their web site, http://www.ornl.gov/sci/roofs+walls/insulation/.
