How Much Does Wall Insulation Cost?

Good insulation increases the value of your home. While you will have to spend money on insulating your house, you can recover that cost through lower energy bills. If you are looking for affordable wall insulation services, you can contact Clean Air Doctors. They offer different insulation services at reasonable prices, like wall and attic insulation and radiant barrier installation.

Average Cost of Wall Insulation

Most wall insulation falls within a similar price range. The common insulation values are for 2 x 4 walls with an R-value of 13 and 2 x 6 walls with an R-value of 21. The material cost will range between $0.35 and $0.52 per square foot, respectively, or $35 and $52 per 100 square feet of wall space.

Cost of Wall Insulation by Type 

Wall insulation is of four common types. Given below is the cost to insulate your wall by insulation type:

Batts and Rolls

Batts and rolls of insulation are designed to fit the standard width between rafters, wall studs, and joists. This insulation is made using fiberglass. It may be available in other materials like mineral wool, cotton, and plastic. The cost of batts and rolls insulation is between $0.65 and $2.00 per square foot.

Blown-In Insulation

This type of insulation requires equipment to blow the material into the space that must be insulated. It is typically made from recycled cellulose. It may sometimes be available in fiberglass and rock wool as well. Blown-in insulation can fit in almost any location and be added to hard-to-reach areas. The average cost of blown-in insulation ranges from $1.65 to $3.80 per square foot.

Foam Board Insulation

Foam board insulation can be used to insulate your home’s exterior. Foam board insulation costs between $2.40 and $3.75 per square foot.

Spray Foam Insulation

This insulation is ideal for existing finished areas and hard-to-reach spaces. It is made using liquid polyurethane. The cost of spray foam insulation ranges from $3.15 to $7.50 per square foot.

Factors Affecting the Cost

The cost of insulation depends on whether you are newly constructing your home or remodeling it. You can use any insulation in a newly built project. However, you will have limited options for insulation during a remodel. It will depend on how much wall cavity you can access. The materials used will also impact the cost. Another significant factor of insulation cost is labor. 

New vs. Existing Construction

It is easy to install insulation in a newly constructed home as the ceilings and walls are still unfinished and open. The cost of insulating a new home will be at least $1 less per square foot than that of an existing home. 

Removal of Existing Insulation

If you already have insulation that is starting to degrade or is no longer effective, you may want to replace it with new insulation. Removing existing insulation costs between $1.00 and $3.00 per square foot. The cost of removal, combined with replacing it with new insulation, will range between $2.50 and $8.00 per square foot.

Labor Cost

The labor cost of wall insulation will depend on the material used, the installation method, the accessibility of the area to be insulated, and the equipment required. The average labor cost for wall insulation ranges from $0.25 to $2.50 per square foot.

Cost of Insulating Other Locations in your Home

Besides your walls, other areas in your home will also require insulation. Given below is the cost of insulating other areas of your home:


An average two-car garage is considerably inexpensive to insulate. The average cost to insulate a two-car garage is between $0.50 and $1.25 per square foot.


The basement will not require heavy insulation compared to the rest of the home. It is surrounded by things that naturally keep the area cool and warm during the winter. The average rate to insulate a basement ranges from $1.50 to $2.50 per square foot.


The attic is the most important part of your home that must be insulated. Usually, the attic is insulated with spray foam insulation. The average cost is between $1,500 and $6,000.


Roof insulation can be helpful if you have trouble retaining heat in your house. A professional can lay rigid foam board insulation beneath the shingles for new construction. You can use batting or spray foam insulation with rafters for existing buildings. The average cost to insulate your roof will range from $1,500 to $4,500.

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