Key Takeaways:

  1. Attic insulation is essential for maintaining a comfortable and energy-efficient home.
  2. R-value measures thermal resistance or how well a material resists heat transfer.
  3. The top 4 types of insulation materials are fiberglass, loose-fill, spray foam, and Rockwool.
  4. Each type has its pros and cons to consider when making an informed decision on the best fit for your home.
  5. Cost, R-value, ease of installation, and durability should all be considered when selecting the right insulation option. Expert advice may also be necessary for some instances to ensure maximum efficiency!

Seeing a recent spike in your energy bills? Do you find your attic to be uncomfortably cold during the winter? If you answered “Yes” to both questions, there could be an issue with your attic insulation.

Insulating your attic is crucial in maintaining a comfortable and energy-efficient home. When faced with these conditions, you must seek out insulation replacement. But the real challenge you may face is choosing the suitable material. With so many options present on the market, it can be challenging to know which type is the best fit for your home.

That’s why Absolute Roofing and Construction, Inc has put together a brief guide on the top 4 types of attic insulation to help you make an informed decision. From traditional options like fiberglass to newer alternatives like spray foam, we cover the pros and cons of each option. So, you can choose the one that will provide the best performance for your home and budget.

So, if you’re a homeowner looking to upgrade your insulation, you’ve come to the right place. Let’s dive in and look at how we can help you make your roof more energy-efficient!

R-Value: An Overview

What does it Mean?

Before we get into the different types of insulation materials, it’s essential to understand what R-value is and why it’s crucial when considering a new insulation material. R-value measures thermal resistance – or how well a material resists heat transfer. It can help you determine whether an insulation product suits your home and climate.

How is it Measured?

R-values are expressed in square feet per hour while exposed to 1 degree Fahrenheit (F) temperature differential across the material’s thickness. It may sound a little gibberish, but you don’t need to be an expert in the science of insulation to understand why it’s essential. The higher the R-value, the better insulated your home will be and the greater energy efficiency you’ll enjoy!

Attic Insulation Types

For insulating your attic, insulation specialists have found the following materials to be the best:

  1. Fiberglass
  2. Loose-fill Insulation
  3. Spray Foam
  4. Rockwool

1. Fiberglass

It is the most common insulation material and one of the least expensive. It’s made of finely ground sand, recycled glass, and other natural materials that are melted down and spun into fibers.


  1. It’s the most affordable insulation material.
  2. It has an excellent R-value between 2.9-3.8 for every inch of thickness, providing an effective thermal barrier.
  3. It doesn’t require additives to be fire-resistant.
  4. The material is budget-friendly, and you can also do a DIY installation.


  1. It can irritate the skin and eyes due to the glass fibers
  2. The material is not as durable when compared with other types of insulation
  3. It can settle over time, creating small gaps that reduce the overall effectiveness of the insulation.
  4. You might need help to install it due to pre-cut sizes not fitting correctly in your attic.

2. Loose-fill Insulation

This type of insulation consists of tiny pieces of recycled paper or cellulose fiber blown into your attic space using special equipment.


  1. This insulation is straightforward to install, even in hard-to-reach attic spaces.
  2. It can fill in gaps and cracks that are hard to get at with other insulation materials.
  3. Because it is recycled paper, it is an environmentally friendly way to insulate your attic space.
  4. Boasting an R-value of 3.2-3.8, it surpasses the expected value offered by fiberglass insulation.


  1. It does not have the highest R-value, so that you may need more for maximum efficiency.
  2. The pieces of insulation can settle over time, reducing the effectiveness of your insulation job.
  3. This type of insulation is less durable than some other materials. Over time, you may need to replace or add to it if you want optimal energy efficiency from your attic space.
  4. It requires special machinery to install, making it a far more complex process than fiberglass.

3. Spray Foam Insulation

This insulation is sprayed directly onto the attic walls, sealing cracks and crevices to ensure maximum energy efficiency. It is one of the most expensive options but offers one of the highest R-values.


  1. Its R-value ranges from 3.7 to 6.2 per inch of thickness, depending on the type of foam used.
  2. Seals any cracks or crevices with ease
  3. Compared to other materials, spray foam has a longer lifespan.
  4. It also offers some soundproofing properties.


  1. Installing insulation with this material can be costly, ranging from $100-$120 per 100 sq. feet. Suppose you’re considering investing in this option for your home. In that case, it’s best to consult an expert on the cost and determine if it is feasible.
  2. Requires professional installation, adding to labor costs.
  3. Offers limited flame-retardant protection compared to other insulation types.
  4. If not installed correctly, it could result in an inefficient seal and drastically reduce its energy efficiency effectiveness.

4. Rockwool

Rockwool is an insulation material made from spun rock fibers. It has a high R-value and is fireproof, making it another excellent option for many households.


  1. It offers excellent thermal resistance capabilities and can reach R-values of 3.2-4.0 per inch, depending on the thickness of the product you install in your home.
  2. Its flame-retardant properties make it an ideal choice for homes when installed near dangerous areas prone to fires that could cause severe injury to life.
  3. Rockwool provides good soundproofing capabilities, making it perfect for reducing noise between rooms or floors in your home and coming from outdoors.
  4. Due to being firmer and more durable than fiberglass, they are easier to work with, and you can cut them more accurately to deal with irregular areas.


  1. Rockwool is heavier than other materials and could be challenging to install in certain areas.
  2. Rockwool costs more than other insulation materials, sometimes even twice as much.
  3. If not correctly installed, rock wool can create air gaps due to its heaviness, reducing its efficiency as an insulator.

Related: Attic Ventilation Fans: Do You Need Them?


Cost, R-value, ease of installation, durability, and other factors should be considered when choosing the best attic insulation for your home. Different materials may be necessary to achieve the desired R-value in some instances. While DIY projects can save time and money, it is crucial to seek expert advice to ensure a safe, insulated installation and maximum efficiency.

Contact Insulation Specialists for your Home in Mentor, OH

At Absolute Roofing and Construction, Inc., we deliver exceptional insulation services to customers in Mentor, OH. Our expertise covers attic and crawl space insulation using fiberglass, cellulose, or spray foam materials. With a dedicated team of insulation specialists, you’ll have peace of mind knowing that we will select the most suitable type of insulation as per your requirements while staying within budget. Our professional installers will install it with zero gaps or cracks to guarantee maximum energy efficiency!

Contact us today and get a free estimate for your insulation project.