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How Much Does Foam Insulation Cost for an Existing Home in 2020? (Prices/Rates/Factors)
Amanda Ringler

By: Amanda Ringler on December 9th, 2016

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How Much Does Foam Insulation Cost for an Existing Home in 2020? (Prices/Rates/Factors)

spray foam  |  cost  |  foam insulation cost  |  insulation  |  whole house


Your home is one of the biggest investments you will make in your life and where you will spend most of your time, so comfort needs to be a top priority.

Insulating your home using injection foam and spray foam can make a difference year-round, not only keeping you cool in the summer and warm in the winter but also saving you money on your monthly energy bills.

All of this sounds well and good, but what’s the price tag? I know that’s what you’re here for, and I promise to break it all down, including what factors determine the cost.

Not Every House is the Same

There are several factors that come into play that lead to the final cost for an entire home installation project. 

The size of the areas that need insulation is one of those factors. Not every home is the same, so the best way to get an exact amount will be to have an estimator come to your home to take a look.

But fear not, for the purpose of informing you of the process, we will use price ranges to help you get an idea of how much the project could cost you.

How Much Does it Cost to Insulate a House with Foam Insulation?

The cost to insulate an entire existing home with foam varies widely. 

The price range is from $8,000 all the way up to $20,000.

The size of the treated surface area is what makes that price range so vast. The size of your living space is not considered when factoring the price.

There are several other factors that determine how much it is going to cost to insulate an entire existing home, but the number one factor is the size of the area to be insulated.

What Factors Determine the Total Cost of Spray Foam Insulation?

Whole-house-1-300x225As mentioned above, the size of the area to be insulated is the number one factor. 

It is determined by the height of your walls, the pitch of your attic, and the size of your crawl space, as well as how many stories your home has.

The second factor that greatly determines the cost of a whole home insulation project is the difficulty of the job. This breaks down to the kind of siding you have. Vinyl siding is very easy to work with, but brick siding tends to be more difficult.

Vinyl siding is the easiest to work with, while aluminum siding tends to be slightly more difficult. Vinyl siding is easy to pop off of the home to drill holes where the foam will be injected. The same applies to aluminum siding, although the process is slightly different. Once the foam is installed, the holes are filled with foam caps.

Brick siding is harder to work with and requires crews to drill into the mortar to get to a point where they can inject the foam. Holes are drilled into the top, middle, and bottom of each stud cavity to ensure the stud cavity is filled. After the foam is injected and the cavities are full, then mortar must be used to fill in the holes that were drilled.

With all of these factors, a person who has a larger area to insulate along with brick siding will get a higher estimate than a person who has a smaller area to insulate with vinyl or aluminum siding.

RELATED: Insulating Exterior Brick Walls: Should the Wythe Cavity or Between the Studs Be Done?

Types of Insulation Products Offered

700x467_SprayFoamInstallation_jpg-300x200When an entire home is insulated by RetroFoam of Michigan with foam, there are two types of products used – RetroFoam injection foam and spray foam. 

Essentially it comes down to areas that are considered an open cavity or a closed cavity.

RetroFoam will be used throughout the house in any area that has closed cavities, such as walls.

Spray foam will be used in areas that are open cavities, including attics, crawl spaces, and rim joists.

Spray foam would also be used in homes with a cathedral ceiling. In this case, strips would be cut into the ceiling and the foam would be sprayed into each cavity. Once the foam is applied, the cut strips would be replaced with a rough patch of drywall mud to cover the seams.

There are two types of spray foam, open cell and closed cell which have different properties and applications that can also impact the cost.

RELATED: Open Cell vs Closed Cell Foam Insulation: Which is Better for My Home?

What Other Services are Offered in an Entire Home Insulation?

  • Free estimate – A project manager comes to your home, takes measurements and looks for trouble areas, and then gives you a quote of how much the project will cost. They will also discuss any discounts and rebates you could be eligible for.
  • Free concierge program – A concierge is assigned to each customer who will stay with them throughout the entire process. The concierge will know the project like the back of their hand.
  • Help to complete financing1 – For customers who are looking to get their project financed, an employee at the contractor’s office will help walk the customer through the process.
    1 With approved credit. Call for details, 866-843-4960.
  • Clean-up before the project – Almost every home has existing insulation in the attic that will need to be removed. The contractor should have a crew that comes out to the home and spends several hours removing the old insulation from the attic, crawl space, and rim joist to prepare the space for spray foam.
  • Clean-up after the project is complete – After the insulation job is completed, crews work to return the home to the way it looked before the project was started. This includes cleaning the siding and vacuuming up any foam on the ground.
  • Rebates – Most customers get rebates from their energy provider. A good contractor will send those rebates in for the customer after the job is done.
  • Lifetime Warranty – The lifetime warranty is sent to the homeowner after the project is completed. This warranty is valid for the life of the home and is transferable.

All of these above services should be included in the price of the project, so there are no added charges.

RELATED: The RetroFoam of Michigan Process from Estimate to Install 

How Much Time Does it Take to Insulate an Entire Existing Home?

Crawl-space-fiberglass-insulationAn entire existing home insulation project takes approximately two days.

The first day is spent cleaning out existing insulation in the attic, crawl space, and rim joist depending on the scope of the project and preparing it for spray foam. This process takes about 4- to 6-hours.

On the second day, the two crews show up in the morning ready to work. Spraying and injecting foam can range anywhere from 4- to 7-hours depending on the size of the job.

Additional Fees, Taxes and Costs

There are no additional fees or hidden costs once the job is completed. 

The estimate you sign and agree to is the final cost of the project.

Getting Started with a Free Estimate

When you are ready to schedule a free in-home estimate and live in Michigan's lower peninsula or greater Toledo area, give us a call at 866-900-3626, or fill out the form on this page

If you want to continue your educational journey into the world of foam insulation, you can also head over to our Learning Center where there is a ton of resources available.

You can also check out our budget calculator to give you a rough idea of the cost of the project, but keep in mind that it doesn’t include any discounts or rebates you could be eligible for.

Related Articles

How to Plan and Pay for Your Foam Insulation Cost

Home Insulation: Everything Homeowners Need to Know

The Total Lifetime Cost of Foam Insulation: It’s Less Than You ThinkInsulation Budget Calculator

About Amanda Ringler

Amanda previously has worked as a breaking news and crime reporter, TV news producer, and editor in Flint and Detroit. Throughout her career as a journalist, she has won several awards from the The Society of Professional Journalists - Detroit Chapter and the Michigan Press Association. As part of the RetroFoam of Michigan family, Amanda uses her experience as a journalist to write content that will help educate homeowners on the benefits of foam insulation. When Amanda isn’t writing, she’s spending time with her husband and rescued huskies. She also loves knitting, making art, cooking, and hosting dinner and a movie night for friends and family.