Is blown cellulose better than fiberglass?

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.

Is cellulose insulation more expensive than 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.

Is fiberglass or cellulose better for soundproofing?

One of the biggest benefits of cellulose insulation is its long-term energy savings. In fact, you can save up to 50 percent on your heating and cooling bills! Cellulose is great for re-insulating homes, from attics to walls to crawl spaces and, like fiberglass, offers superior soundproofing abilities.


What insulation is better than fiberglass?

Mineral Wool Insulation

In many ways, mineral wool is a superior insulation product. It has a higher R-value per inch compared to fiberglass, about a 22-37% higher R-value. It contains 70% recycled material, making it a greener product than fiberglass at 20-30% recycled material..

How long does blown cellulose last?

Blown in cellulose insulation will last anywhere from 20 to 30 years under ideal conditions. There are many factors that affect the lifespan of blown in cellulose which is why you need to make sure that it is installed professionally from the beginning.


Is Cellulose insulation Better Than Fiberglass Insulation For My Attic



Which type of insulation is most effective?

Spray foam insulation is the most energy-efficient insulation to create an air barrier in the attic. Certain spray foams can expand up to 100 times its original size, so it fills all of the nooks and crannies in the attic.

Does blown-in cellulose insulation settle?

Cellulose insulation can settle by as much as 20 percent, depending on how it is installed. This could leave gaps in a wall as the insulation compacts vertically, or it could leave space between a floor and the insulation beneath it.

Does cellulose insulation need a vapor barrier?

Air / Vapor Barrier

A common misconception is that vapor barriers are required in all insulation installations. With Modern's Cellulose insulation, a vapor barrier is not recommended except in very cold weather or high moisture areas such as spas or pool buildings.

Is it OK to put cellulose insulation over fiberglass?

The existing insulation will dry once the cause of the moisture is stopped. Adding new cellulose insulation on top of existing fiberglass insulation is called "capping". If you have some insulation in your sidewalls, cellulose can usually still be forced in with the dense-pack method to achieve the desired R-factor.


Is blown insulation better?

Generally, we don't recommend installing batts in the attic—blown insulation can fill the space better for more energy-efficient performance. But this may not be the case for every single home.

What insulation is best for soundproofing?

When soundproofing is your goal, your best options out there are fiberglass insulation and blown-in cellulose insulation. Both materials are incredibly good at their jobs; they insulate incredibly well but also have the coveted noise-reducing properties that many homeowners are seeking.

Is cellulose a good sound barrier?

Cellulose insulation can reduce sound traveling through walls and between floors. The density of cellulose gives it an advantage over other forms of insulation, such as fiberglass. Cellulose insulation works to reduce the lateral movement of sheetrock, which decreases the amount of sound that can travel through walls.

How much does cellulose insulation cost?

Cellulose. The cost to have blown-in cellulose insulation installed varies based on the type of cellulose necessary. On average, cellulose runs $1.20 per square foot to install, with wet-spray cellulose ranging from $0.60 to $1.80 per square foot and dense-pack cellulose running $2.00 to $2.30 per square foot.


Which blown-in insulation is best for attics?

Blown-in Insulation

Fiberglass, cotton, and mineral wool can all work as loose-fill material, but the far and away top choice for blown-in insulation is fiberglass. Contrary to batts insulation, blown-in fiberglass insulation is perfect for filling in tight voids around wiring, pipes, or any area with awkward framing.

Which is better blown-in or batt insulation?

Practical and durable: When comparing batt insulation vs. blown cellulose, keep in mind that batt insulation is a more effective thermal barrier. The thermal performance of loose fill insulation will not last for the life of the building. Most blown-in insulation materials will settle and lose R-value over time.

How much does it cost to insulate an attic with cellulose?

Cellulose: A more eco-friendly material made of recycled newspaper and cardboard, cellulose insulation costs about $0.33 per square foot, which equates to about $160 in material costs for a 500-square foot attic.

What are the benefits of cellulose insulation?

Here are six benefits of choosing cellulose insulation.
  • Cellulose is made of recycled materials. ...
  • The R-value of cellulose is better than most other insulations. ...
  • It's better for your health. ...
  • Cellulose is generally cheaper than many other options. ...
  • There are less risk of fires, mold and insects.


Does fiberglass insulation lose R-value over time?

Fiberglass Insulation Struggles to Release Moisture

That's because insulation performance decreases dramatically. A 1.5% increase in moisture content in fiberglass insulation can reduce its R-value by up to 50%, according to Rastra. That's not a typo.

Should I remove old insulation before blowing in new?

Expert contractors that specialize in insulation advise that removing old fiberglass insulation is best before installing new cellulose insulation because of possible mildew, mold, or rodent excrement.

What is the R-value of blown in cellulose?

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.

Will cellulose insulation mold?

Mold growth sets in: Thanks to its chemical treatment, mold doesn't grow on cellulose insulation. However, water-soaked fibers sit right against wood studs and drywall, which are susceptible to mold growth.


Does cellulose insulation attract insects?

No. Cellulose insulation has not been known to attract insects. In fact, the opposite is true. This insulation is usually sprayed with pest repelling chemicals such as Borax or boric acid.

Is cellulose a good attic 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.

How long does cellulose insulation last in walls?

Cellulose Insulation

The typical lifespan is 20 to 30 years, with degradation beginning as early as 15 years after installation. As with other types of insulation, severe weather or outside interference can reduce the lifespan. Note: cellulose is often used as supplementary insulation.

How long is blown in insulation good for?

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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