Homeowners Guide To The Most Used Home Insulation Types

Atlantic County NJ Homeowners Guide to Home Insulation

Insulation upgrades and retrofits for your Atlantic County, New Jersey home can help improve your indoor home comfort, lower energy bills, and more. But with so many insulation types out there, how do you know which one is best for your home? Is one ‌insulation better than another?

 To help you make the best decision for your needs, we will take a look at the pros and cons of each type of insulation.

So, let’s go through the basics of a few different common home insulation materials, and how each can be used by a professional insulation contractor near you in Absecon, Galloway Township, Mays Landing and other Atlantic County locations to benefit your home.

Article Content

  • Fiberglass Insulation
  • Cellulose Insulation
  • Mineral Wool Insulation (AKA Rock Wool)
  • Spray Foam Insulation
  • Rigid Foam Board Insulation
  • Blown-In Insulation
Batt roof insulation being installed
Roof insulation to keep out the sun's temeratures.

Fiberglass Insulation

If you have any experience with remodeling, it’s probably fiberglass insulation, aka “the pink stuff.” you are familiar with. They make fiberglass from spun melted glass, that forms into loose threads.

It may remind you of cotton candy… but, don’t eat it.

The fiberglass loose-fill and blown-in insulation is blown into the cavities in walls or across attic floors, providing a nice ceiling insulation.

Insulation contractors, builders and homeowners have used fiberglass insulation batts in homes across South Jersey for decades. It is an affordable and efficient insulating material.

Where fiberglass insulation is commonly installed in a home: 

Fiberglass Insulation R Value Per Inch

The R-value for fiberglass batts ranges from 3.1–3.4 per inch of thickness. 

For loose-fill fiberglass insulation in an attic, the R-value is 2.2–4.3 per inch and for the wall is 3.7—4.3 per inch.

Cellulose Insulation

Cellulose insulation is like fiberglass in that they can install it as loose-fill, either across your attic floor or dense-packed into wall cavities, or as pre-formed cellulose batts or blankets. The biggest difference between cellulose and fiberglass is what it’s made of—cellulose is made from recycled newspaper that’s been treated to be fire retardant, so it’s environmentally friendly, recycled and affordable.

Where they install cellulose insulation in a home: 

  • Floors  

  • Walls

Cellulose Insulation R Value Per Inch

Approximately R-3.5 per inch of thickness.

Mineral Wool Insulation (AKA Rock Wool)

Mineral wool comes in board, batt and for blown-in insulation. Mineral wool insulation is available in both unfaced and faced. Mineral wool insulation R-values are typically found in ranges from R-8 to R-49. The higher R values are normally when used in the blown in type for attics.

Rock wool insulation is a go-to product for its fire protectant features. Often used for insulation around hot or heated mechanical systems. A tanked hot water heater has rock wool insulation around it and they also make a water heater jacket of the stuff. Mineral wool insulation as an effective acoustical barrier. It can be found in interior and exterior wall cavities, ceiling cavities, attics and roofs.

Mineral Wool R-value.

3 to 3.3 per inch thickness  


Insulation of attic with foam insulation cold barrier and insulation material polyurea Spraying
Spray foam is perfect for roofing and attic spaces.

Spray Foam Insulation

Spray foam insulation is a two-part spray foam that, when installed in a home, expands and hardens into a durable insulation with a high R-value. Also called SPF, or spray polyurethane foam. This type of insulation is also an air barrier, removing the need for additional air sealing during insulation upgrades. Some types of spray foam are even water resistant, which helps in areas like basements and crawl spaces. This insulation is best installed by spray foam insulation contractors. 

Where they install spray foam insulation: 

  • Attic 

  • Rafters

  • Walls, 

  • Basements & crawl spaces

Spray Insulation R Value Per Inch

Closed cell spray foam has an R-value of R-7 per inch. In comparison, open cell spray foam has an R-value of R-3.8 per inch.

Construction worker installing styrofoam insulation sheets

Rigid Foam Board

Rigid foam boards are as the name implies, it is a sturdy flat board of foam insulation. We can cut it to size like you would a sheet of plywood. Then edges are sealed with tape or a can of spray foam. Rigid foam board is durable and is used for home’s exterior walls, behind siding. So it also acts as an air barrier for a superior energy efficient home.

Our insulation installers, install rigid foam board insulation in: 

  • Attic 

  • Rafters

  • Floors

  • Walls

  • Basements & crawl spaces

Our waterproofing contractors use rigid boards the most for the foundation, ‌increasing the energy efficiency of the home foundation. You also see it inside the home as it is great for finished basement walls.

The R-value of rigid insulation varies based on the material.

Polyisocyanurate or ‎ ‎Polyurethane are the two types.

The values that range from 3.6 to 4.2 or more per inch.

Technician spraying blown Fiberglass Insulation between Attic Trusses foam insulation repair tool in
Blown-in attic and wall insulation is perfect for older homes.

Blown-In Insulation

When we think of attic insulation, we often think of blown-in insulation. A guy stands out a t feed hopper and another insulation installer sprays or blows in the insulation through a hose. This is a great way to insulate your attic. They can even do it to fill wall cavities and to soundproof floors. 

Blown-in insulation material comes in bags and four popular brands are:

  • Knauf

Blown Insulation R Value Per Inch

Blown-in fiberglass has an R-value of 2.2 to 2.7 per inch.


Types of blown in insulation are:

  • Fiberglass Blown in Insulation

Fiberglass blown-in insulation is flexible in establishing an R-value. The depth of the installed material determines the R-value. Fiberglass blown-in insulation is typically used in attic fill, mid-floor and netted wall cavity solutions. Due to its excellent ability to seal small air cracks and spaces, fiberglass blown-in insulation is also an effective product for reducing noise throughout a home.

  • Mineral Wool Blow in Insulation

Mineral wool blown-in insulation is a mineral wool insulation product that is made in a granular form. Mineral wool is usually applied as attic fill. Mineral wool blown-in insulation, also referred to as rock wool blown insulation, is a popular insulation type for attics, wall cavities, and ceiling cavities.

The benefits of mineral wool blown-in insulation are it works well in several applications. Rock wool is an excellent thermal and acoustical barrier, fire protection, and can be used in any type of construction. They can use it in any climate zone.

  • Cellulose Attic Insulation

We typically find this in open attic applications. Blended cellulose insulation is a widely used insulation product that has a blend of borates and ammonium sulfate. This makes it a highly rated fire blocking insulation product that helps resist the spread of flames. 

Cellulose insulation benefits are its flexible R-value and great fire rating that is known for its ability to seal cracks and small spaces. Plus, it is a good soundproofing insulation.

So now that you know a little more about different types of insulation, how do you make the right decision for your home? Call your local insulation replacement specialists!

At Atlantic County Home, our insulation contractors have completed thousands of retrofits for New Jersey homeowners—we know what insulation works best in the Atlantic County, New Jersey climate and how to find the right insulation choice for both newer and older homes. Because every home is different, we take the time to listen to homeowners’ experiences and work to find a home performance solution that addresses energy efficiency or home comfort issues you’re facing, all within your budget.

Ready to upgrade your home’s insulation?

Contact us today to schedule a home energy audit with Atlantic County Home.

Home Insulation Service Area in Atlantic County, NJ

Atlantic City
Corbin City
Egg Harbor Township
Estell Manor

Galloway Township
Hamilton Township
Hammonton Township
Margate City

Port Republic
Somers Point
Ventnor City

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