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Blown-In Insulation Calculator
Input length, width and desired R-value of the area you’re insulating. Click the button to calculate the depth (in inches) and pounds of total insulation necessary for this job. Get information on R-values below.
This calculator is to be used as an estimating tool only.
Why Do You Need to Know the R-Value?
R-value tells you how well insulation prevents heat moving from one space to another. R-value is also a factor in the depth of blown-in insulation you need.
The United States Department of Energy recommends R-values based on your location in the US. Match your region on the map to the chart below. Keep in mind:
- You should always check R-values against building codes.
- If you live in a cooler part of the country, you likely need a higher R-value for your blown-in insulation.
- Attic insulation usually needs higher R-values than other spaces in a home.
- While blown-in insulation is common in attics, some types are suitable for other areas.
- Look for R-values or R-value ranges when you shop for blown-in insulation.
- R-values are cumulative. If you already have insulation in your attic, for example, you can often improve your R-value by adding a layer of blown-in insulation.
Insulation is available in many forms and for many applications. Once you know the R-value you need, shop for blown in insulation or other types of insulation for your space.
- Wall insulation
- Attic insulation
- Ceiling insulation
- Basement insulation
- Crawlspace insulation
- Floor insulation
Other insulation types include:
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Estimate Your Blown-In Insulation Project
The key to success for any project is in the preparation. Budgeting for materials is a major component of the process. Use our Blown-In Insulation Calculator to determine the amount of materials you need to complete your insulation project.
Cellulose or Fiberglass?
Which blown-in option is best for you? There are advantages to both. Fiberglass blown-in insulation, a great noise insulator made primarily of glass fragments, is cost-effective, long-lasting, nonflammable and moisture-resistant. Cellulose insulation is made from recycled materials, like newspaper and wood fragments, that are shredded so they’ll bind together. Fire and insect retardants are added for safety. Cellulose is environmentally friendly and fills cavities well due to its bulk, but it tends to settle more than fiberglass.
Estimating Needed Amounts
We’ve made it easy to estimate the amount of blown-in insulation you need with our Insulation Calculator. Measure the length and width of your room and input the R-value best for your area of the country.
Completing Your Project
Lowe’s has the tools you’ll need to make your project a success. We have free 24-hour blown-in machine rentals (based on minimum bag purchase and availability). You can also find coveralls, gloves, protective eyewear, drop cloths, utility knives and rulers to make the job go smoothly.
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