Asked by: Elmo Buchner
home and garden indoor environmental quality

What is the difference between blown in insulation and rolled insulation?

Last Updated: 16th May, 2020

Batts, or rolls, are large blankets of insulation that are made from either fiberglass or cotton. Blown insulation is accomplished by blowing out chunks of either fiberglass or cellulose from the hose of a blowing machine. The main benefit of blown insulation is that it is a much more consistent type of insulation.

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Furthermore, which is better blown in insulation or rolled?

Blown fiberglass insulation scores an R-value of 3.2 to 3.8, making it slightly less likely than rolled fiberglass to prevent the flow of heat into and out of your house. That being said, though, blown fiberglass insulation isn't meant to cover huge areas like rolled fiberglass insulation.

Additionally, is blown in insulation good? - Blown-in insulation is better for the environment. Blown-in insulation is composed of mainly recycled materials like cellulose and fiberglass. - Blown-in insulation has an R-value between 2.2- 3.8 per inch of product, and while this is still low, the loose material is easier to fit in most areas.

Keeping this in consideration, what type of blown insulation is best?

The best insulation options for an attic are open cell spray foam, fiberglass, and cellulose.

  • Cellulose is the oldest insulation material used for not only the attic, but other areas of the home as well.
  • Fiberglass is another traditional insulation material that consists of extremely fine glass fibers.

What is cheaper blown or batt insulation?

By contrast, installing fiberglass batts or rolls, while labor-intensive, is not hard for DIYers. Material cost. The insulation itself costs about the same for comparable R-values. Blow-in cellulose costs about $30 for each 19-pound bag, which will cover about 40 square feet at minimal R-value.

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Can you put too much insulation in your attic?

Without proper ventilation, a home can build up too much moisture, especially in the attic (warm air rises), which can cause mold problems and, overall, lower indoor air quality. This is not to say that if you have mold in your home, too much insulation is the culprit.

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How long does blown in insulation last?

How Long Does it Last? Cellulose insulation has a typical lifespan of around 20 to 30 years. Since it is made of recycled newsprint, it will degrade over time, faster than fiberglass insulation. However, during its lifetime it does provide air-blocking properties that fiberglass does not.

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How many inches of insulation should be in an attic?

The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

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Should old attic insulation be removed?

Remove Old Insulation
Once there is no asbestos, mold, or rodents, it is generally safe to proceed with attic insulation removal yourself. Some insulation is easier to remove than others. Luckily homeowners are more likely to find the easier kind which is blown-in fiberglass or cellulose insulation.

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Can you lay insulation over electrical wires in attic?

If there is not anyinsulation in your attic, fit the insulation between the joists. Don't compress the insulation to fit behind pipes or wires. Instead cut to the middle of the batt's thickness so you have a flap under the wire and one over the wire.

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What is the best type of insulation for an attic?

Loose-Fill Insulation
Cellulose is the most effective material and has an R-value of 2.2 to 3.8 per inch, but if exposed to moisture it can get moldy.

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What's the best way to insulate your attic?

Blow in the fill between and over the joists rather than across them. Always use unfaced batts, both when laying product for the first time and to prevent moisture from becoming trapped between new and old layers of insulation. You can buy them unfaced or simply remove the paper or foil backing.

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How much will insulating my attic save?

Save about $600/year by boosting the amount of attic insulation from R-11 to R-49. Depending on the type of materials you use, figure on paying an insulation contractor about $1,500 to insulate an 800-square-foot attic, which pays back your investment in three years. You'll spend about half that to do the job yourself.

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How do you know if blown in insulation has asbestos in it?

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If your insulation is gray-brown or silver-gold, chances are it's time to call a professional. If your loose-fill insulation is a dull gray, and soft – it's a good bet that your insulation is mineral-based and asbestos-free.

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Is blown in insulation better than fiberglass?

Fiberglass blown-in involves using a machine to pump 2 the loose insulation into the wall cavities. This is slightly more difficult but provides better installation. Cellulose insulation is always blown-in. This makes it slightly more difficult than fiberglass batts but comparable to blown-in cellulose.

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What are the different types of blown in insulation?

There are three general types of blown insulation materials currently available: fiberglass, cellulose and rock wool. Fiberglass loose-fill insulation is made glass and sand that are spun or “blown” into fibers. This type of insulation is great for wall cavities and attics.

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What is the best insulator?

A: The best insulator in the world right now is most probably aerogel, with silica aerogels having thermal conductivities of less than 0.03 W/m*K in atmosphere. of aerogel preventing ice from melting on a hot plate at 80 degrees Celsius! Aerogel has its amazing properties because it's mostly made out of air.

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What is the R value of blown in insulation?

Here are the R-values per inch of the most common types of insulation: Fiberglass (blown): 2.2 – 2.9. Fiberglass (batts): 2.9 – 3.8. Cellulose (blown): 3.1 – 3.8.

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How thick is r60 attic insulation?

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.

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What kind of insulation should I use for interior walls?

Fiberglass batts, foam or cellulose can be used to insulate the interior walls. The third area that needs proper insulation is the floors. Rigid foam boards and traditional fiberglass batts work best on the floors.

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How long does it take to insulate an attic?

Attics - Insulating an attic could take one to two days. This depends on how much old insulation in the attics must be removed. A separate removal crew may come out a day or two before the installation date to remove the old insulation. Once the install crew is there, in most cases the attic can be insulated in a day.

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How do I know if I need more insulation?

A quick way to see if you need more insulation is to look across your attic floor. If your insulation level is at or below the top of the floor joists, you probably need to add more insulation (but remember to seal the air leaks before you insulate).

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Can I spray foam insulation myself?

A: Tom Silva replies: Spray foam is great insulation, but it's fairly demanding to apply; the kit instructions have to be followed exactly. In fact, study them before you buy your kit so you know what you're in for. As with spray-foam kits, protect yourself and the floor from the dripping globs of canned foam.

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What are the different types of attic insulation?

The most common insulation materials are fiberglass, cellulose and foam. Insulation types include loose fill, batts, rolls, foam board, spray board and vapor barriers. Tip: The type of insulation you need depends on which type is currently installed and the required R-value.