Table of Contents
- 1 What is the most effective attic insulation?
- 2 Is blown-in attic insulation worth it?
- 3 Which is better fiberglass or cellulose blown-in insulation?
- 4 What is the best R-value for attic?
- 5 What are the disadvantages of cellulose insulation?
- 6 What is cheaper blown-in insulation or fiberglass?
- 7 How many inches of insulation should you have in your attic?
- 8 How many inches of blown insulation do I need?
What is the most effective attic insulation?
Fiberglass is one of the best attic insulation materials, and it’s available in various forms. We’ve already discussed the batts and roll forms, both of which involve flat, pre-cut sections. But fiberglass is also available in loose-fill or blown-in form.
Is blown-in attic insulation worth it?
Unless your home is relatively new, you will almost certainly benefit from installing blown insulation in your attic. It will make your home a more comfortable place to be in summer and winter, decrease the cost of your energy bills, and increase the value of your home.
Which is better fiberglass or cellulose blown-in insulation?
At 3.5 per inch of material, the R-value of blown-in cellulose is 23\% better per inch than fiberglass batts! According to research done at the Oak Ridge National Lab, fiberglass loses up to 50\% of its R-value in very cold conditions; making cellulose a better choice for homes in northern climates.
What R-value should I have in my attic?
R-Value is a measure of insulation’s ability to resist heat flow. The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.
Is batt or blown insulation better?
In short, there is less chance of error with blown insulation as compared to batts. Finally, while blown insulation is much more consistent and has a much lower chance of failure, the R-value of this insulation will typically have a higher R-value due to installation quality differences.
What is the best R-value for attic?
Recommended insulation levels for retrofitting existing wood-framed buildings
| Zone | Add Insulation to Attic | |
|---|---|---|
| Uninsulated Attic | Existing 3–4 Inches of Insulation | |
| 1 | R30 to R49 | R25 to R30 |
| 2 | R30 to R60 | R25 to R38 |
| 3 | R30 to R60 | R25 to R38 |
What are the disadvantages of cellulose insulation?
Disadvantages. Installation costs for cellulose can be higher than for fiberglass. Cellulose insulation creates an enormous amount of dust when it is installed, so a certified breathing mask is absolutely essential. Dry-blown cellulose sags and settles, reducing its R-value over time.
What is cheaper blown-in insulation or fiberglass?
When comparing blown-in insulation, both fiberglass and cellulose are nearly identical in price, both costing around $0.70 to $0.80 per square foot for 6 inches of insulation. Fiberglass batts, however, are less expensive, costing on average $0.30 to $0.40 a square foot for 6 inches of insulation.
How much blown-in insulation do I need in my attic?
The higher the R-Value, the better the thermal performance of the insulation. The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.
Is R 19 insulation Good for attic?
Most homes only have R19 in attics. To give you an idea that’s only 5 1/2 inches of insulation. So by adding another R19 “5 1/2 inches will give you an R38 value. And that’s a good number to live with.
How many inches of insulation should you have in your attic?
How many inches of blown insulation do I need?
When blown into attics and wall spaces, loose-fill fiberglass offers an average R-2.5 thermal value per inch (the higher the number, the greater the insulating effect). You’d need a thickness of about 7.5 inches of insulation to match the insulating value of a batt of R-19 insulation (R-19 is a common batt value).