Explore Blown-In Attic Insulation Pros and Cons-Yay or Nay?

When you think about insulation batts, foam planks or plastic wrap, things are rigid. The blow-in insulation is contrary to that formula. It comes in loose formation. There’s some airy material that this formula uses to blow. 

Here one uses a special machine into areas that are uninsulated. These are added during the construction phase. Sometimes people choose to complete the insulation while retrofitting an existing home. It’s also possible to add inside the completed walls.

Let’s know about some blown-in attic insulation pros and cons. This will make it easier to decide whether you should choose or not.

Blown-In Attic Insulation

So, before we get into good-and-bads of blown attic insulation, let’s know the types involved. You need to have a good understanding of different blown in insulation types. We’ll get everything covered today hopefully…



When Drywall is 0.5 Inches & Center is on 24 Inches

When Drywall is 0.5 Inches & Center is on 16 Inches

When Drywall is 1.7272 Inches & Center is on 24 inches





Rock Wool








The barrier formed between house’s ceiling, floors and walls is what we call insulation. The material used for insulating unfinished attics is loose-fill or blow-in insulation. This does not disturb the structure nor finish if right material is chosen. And that’s why this is the perfect way to go for insulation needed in retrofitting.?

Now blown-in insulation basically uses three types of materials. You can refer to the table given above to know right material for your attic’s condition.

The most suitable blow-in insulation material is of course fiberglass. These are completed with glass and sand. It’s the best choice for attic insulation. The material helps to resist moisture and fungus/mildew formation. Fiberglass is better in R-value. It's also super at being non-flammable. Fiberglass causes zero corrosive, resists pest and also, it's non-combustible.

Cellulose is also a very popular fellow element. Especially because of its eco-friendliness. It’s safe for human contact and does wonder for pest prevention. This material also comes with a pretty high R-value and avoids mold formation.

And finally, rock wool is the third type that is basically made from rocks and minerals. It’s quite similar to fiberglass. This type is best for blocking heat, condensation and also avoids sound. There’s the moisture-absorbing benefit with it as well.

The “Yay”Sides of Blown-In Insulation-PROS!

There are more than a few benefits of blown-in attic insulation. Let’s talk about those in a bit detail…

#Your Home Becomes Better at Energy Saving.

The blown-in materials are all pretty efficient at locking temperatures indoor. In summer you don’t have to worry about locking cooler temperature inside. Since the insulation does it pretty well. And during winter this type of insulation helps in preventing heat. As a result, your home becomes better at keeping the existing energy flawlessly.

#Fewer Risks to Fire Damage.

Cellulose and fiberglass are effortless at reducing fire-related risk. This is because of the airtight sealing benefits. The fire-retardant quality resists air flowing through spaces that are relatively small. Also, there’s less fuel flaming.

#Super Simple Installation.

Two people can complete the installation in a few hours easily. A hose is used to insert the material and deliver it into covered areas. professionals are of course better at providing a seamless protective coating. Since there are wooden crossbeams, plumbing pipes and wring involved in this matter.

The installation also takes fewer procedures to complete. There’s no kneeling down for multiple hours. And so, it’s pretty convenient for any type of user.

#Mutes All Indoor Noises.

The material is very well capable of muting all disturbing indoor noises. So, there’s no sound traveling from one room to another and ruining any member's sleep. The sound buffer also shows incredible results in preventing noises from outdoors.

As a result, your home would feel more peaceful and comforting. With high-quality material, you’ll be terror-free from thunder sounds during heavy storms.

#Moisture Reduction for Attic.

Mold and bacteria are always loving environments that are wet and full of moisture. Homeowners are always careful about not giving moisture any entrance into their attic. Through blow-in insulation, one can double the safety by preventing condensation. Also, these materials don’t rot very easily so there’s less chance of damages.

#Better for Hard-To-Reach Spots.

There are many comments from experts saying that blown-in materials are super-efficient. Even when compared to fiberglass batting with the same R-value. These are flexible and so, reaching tough spots to seal those properly is easier. Batting usually does not provide the same level of tightness.

The “Nay” Sides of Blown-In Insulation-Cons!

  • With passing time, the blown-in material becomes less efficient at mold reduction. This is because of using a high percentage of fiberglass. So that it retains water for a longer period. Until it dries, the R-value would drastically reduce. Eventually causing mildew and other similar problems.
  • The blown-in material is great at pest and vermin prevention no doubt. However, this needs a chemical borate treatment that isn’t very eco-friendly.
  • Sometimes, depending on your demands, professionals may charge a high amount for installing. This is usually because of some specific complexity or appropriate equipment needs.

What do you Mean By Blown-In Attic Insulation?

Blown-In Attic Insulation is a popular term nowadays. It means fiberglass, cellulose, and other dense, thick, and amorphous insulation.

Also, it contains a uniform consistency and is suitable for use in confined spaces like walls, between cables, or pipes.

In general, blown- insulation used in homes is made from various materials like recycled cardboard, newspapers, glass, and general waste.

Typically, you have to buy a larger insulation block, insert it in the machine, also fill in the parts that need to be insulated.

How much does Blown-In Attic Insulation Cost?

Here you may ask: how much does it all cost?

The cost of blown-in attic insulation depends on several factors. Among which:

The area you live in as R values depend on location.

Your attic and room size need insulation.

Climatic area of your home

Material with which you finally decide to insulate

Labor costs and professional tools

According to a home consultant, perforated insulation will cost between $ 600 and $ 1,200 for lofts around 1,000 square feet.

The budget for the insulation of the attic with a purge

First, you have to find the suggested R-value that the attic should meet. It depends not only on what kind of insulation you buy but also on the amount required for high-quality coverage of your home.

Next, you have to consider the labor costs for installing inflatable insulation in the attic.

If you have no professional skills and tools for the project, we suggest hiring an expert to do the job.


Is blown-in attic insulation worth it?

Standard fiberglass insulation has an R-value of 2.9 to 3.8 by inch. Blown-In insulations are also an excellent solution for hard-to-reach attics.

However, installing blown-in attic insulation in winter can be a profitable long-term investment as it may significantly reduce your electricity bills.

Which is better attic insulation, blown or rolled?

Laminated fiberglass insulation reaches an R-value of about 3.7. Thus, overall, rolled fiberglass insulations are slightly more efficient at blocking heat than the blown portion.

Is blown-in insulation safe?

Properly coated blown-in insulation will withstand many adverse conditions. As it contains glass, it does not absorb water or burn.

However, because it is glass, there are some safety precautions you need to take when you are near or checking it. If fiberglass insulation moves or breaks, small particles are spread around the air.

What is the best type of blown-in attic insulation?

Fiberglass Blown-In insulation, also popular as loose-fill, appears in small pieces packed in large containers and requires the use of a blower to fill the required spaces.

Cotton, fiberglass, and rock wool can act as free-flowing fillers, but fiberglass is the best choice for blown-in insulation.

Should I remove old attic insulation before adding new?

Experienced thermal insulation contractors recommend excluding old fiberglass insulation before placing new cellulose insulation due to the potential for mold, rodent droppings, or mildew. So, removing the attic insulation will eliminate these potential problems.


And these were the blown-in attic insulation pros and cons visible in most situations. Of course, the good sides are a bit heavier than bad ones. So, there’s no denying that it’s a great choice for homeowners who need practically priced insulation reducing energy cost.

With passing time, the effectiveness will, however, start diminishing. But looking at overall benefits and cost-effectiveness, it’s still a good option. So, anybody who believes that blown-in attic insulation is an appropriate choice for their home, you are making a wise decision!

Leave a Comment