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How Much Does Spray Foam Insulation Cost?
Amanda Ringler

By: Amanda Ringler on January 17th, 2017

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How Much Does Spray Foam Insulation Cost?

Featured  |  spray foam insulation cost  |  cost


Are you considering insulating your home with spray foam, but are curious about the cost of the project?

Because there are so many options and factors, we can’t give you a concrete price, but we can give you a rough idea based on what you’re looking to insulate. All homes are unique, so pricing isn’t the same for every project.

Spray foam can be used in three areas of your home. However, there are different types of foam that can be used for different areas. For example, Icynene spray foam will be used for the attic, crawl space and rim joist and RetroFoam injection foam will be used for existing exterior walls.

Spray foam can also be used in pole barns, commercial buildings, and new built homes just to name a few. For the sake of this article, let's focus on the cost of spray foam in your home.

The cost for using spray foam in these individual areas varies due to the size of the areas that need to be insulated, as well as a number of factors. Here is a breakdown of the price ranges to re-insulate an existing home or just specific areas.

Entire Home Spray Foam Insulation Cost

The cost to insulate an entire existing home with foam varies widely. The price range is from $8,000 all the way up to or exceeding $20,000.

Insulating your entire home using foam insulation 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 energy bills.

You will get the best benefit, comfort, and energy savings by insulating your entire home. Your home acts as a system that includes the attic, walls, crawl space, and rim joist. By insulating your entire home system with foam you will receive the greatest benefits, as opposed to just one section, because it all will work together. If one portion isn’t insulated, then you could still have issues with cold spots.

That being said, sometimes there are cases where it makes more sense to only insulate one portion of the home at a time.

spray foam insulation costAttic Spray Foam Insulation Cost

The total projected cost to insulate an attic in an existing home ranges between $5,000 up to or exceeding $10,000.

Insulating the attic with spray foam will help reduce the heat loss through that space by sealing the envelope of your home and saving you the most money on energy bills.

Crawl Space Spray Foam Insulation Cost

The average cost to insulate a crawl space with spray foam is between $1,150 and $2,500.

Insulating the crawl space with spray foam will reduce the cold floors you experience during the winter, thus making your home much more comfortable.

Rim Joist Spray Foam Insulation Cost

The projected cost to insulate a rim joist with spray foam is between $1,150 and $1,500.

Insulating the rim joist with spray foam will cut down on the drafts you feel from around your baseboards.

Exterior Walls Foam Insulation Cost

Typically when someone has their walls insulated, they do all of the exterior walls. The cost for doing all of the exterior walls will range anywhere from $3,000 up to or exceeding $7,000.

Cold walls and drafts could be reduced after insulating your exterior walls with foam.

What Factors Determine Spray Insulation Cost?

  • The size of the area -- the size of the area to be insulated is the main factor in determining the cost for an insulation project. The larger the area to be sprayed with foam, the higher the cost of the project will be.
  • Material used -- Another factor that determines cost for spray foam insulation is the material used. Open cell foam is usually recommended for homes, but there are instances where a closed cell foam is a better option. Closed cell foam tends to be a more expensive material. There are several differences between open cell and closed cell spray insulation, including the composition, blowing agent, sound dampening capabilities, and moisture permeability. Spray foam insulation, regardless of the type, is going to create an air seal and insulate your attic, crawl space, or rim joist.
  • Brand of foam used -- Not all foam is created equal, different manufacturers have different qualities of foam insulation.
  • Type of siding or exterior -- Depending on if your siding is vinyl, brick, aluminum or wood, the difficulty of working with the siding can impact cost.
  • Thickness of foam applied -- Certain areas of the home may require different applications in inches of thickness of the spray foam. As the thickness increases, the cost rises.

cost of spray foam insulationWays to Reduce the Cost of Spray Foam Insulation

Many utilities offer energy efficient rebates to encourage homeowners to update or add insulation to their homes. These rebates could be as small as around $50 for insulating the rim joist to as large as about $1,000 for insulating the entire home.

Most things you buy don’t pay you back, but the money saved on monthly energy bills will add up to be a net gain in the long term. Some customers have saved as much as up to 10 percent on their monthly bills on the low end, whereas others have seen their bills cut in half.

There are many factors that determine the amount you save on energy bills after your home has been insulated.

Is Spray Foam Worth the Cost?

Is your home or certain rooms in your home freezing in the winter and scorching hot in the summer? Cold floors making your feet cold? Uncomfortable drafts annoying your family? Outrageous energy bills putting a strain on your wallet? Spray foam in certain areas of your home could be the answer.

When it comes to the importance of comfort and energy efficiency, many homeowners have decided the benefits way out weigh the cost.

Getting Started with a Free Estimate

So now that you’ve learned about the factors that determine the cost in spray foam insulation it may be time to schedule an estimate with a spray foam insulation contractor. After reviewing and measuring your home, a good contractor will be able to give you an exact quote to insulate your home.

If you live in Michigan’s lower peninsula and are ready to schedule a free in-home estimate give us a call at 866-900-3626, or fill out the form on our website. You can also check out our budget calculator to give you a rough idea of the cost to insulate your home.

Insulation 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 Detroit Chapter of Society of Professional Journalists 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.