Blog

How Much Does Spray In Foam Insulation Cost in Maine?

As a homeowner in Maine, you’re likely no stranger to the harsh winter weather that plagues our beautiful state year after year. Frigid temperatures and snowstorms can wreak havoc on your heating bill, leaving you with a monthly energy expense through the roof. 

One way to combat this issue is by investing in spray foam insulation for your home. But how much does spray foam insulation cost in Maine? In this comprehensive guide, we’ll break down the cost of spray foam insulation to help you make an informed decision.

Open-Cell vs. Closed-Cell Spray Foam

First and foremost, it’s important to note that there are two types of spray foam insulation: open-cell and closed-cell. 

Open-cell spray foam insulation is generally less expensive than closed-cell, with costs ranging from $0.60 to $1.00 per board foot. In addition, this type of insulation expands to about 3 inches per layer and typically has an R-value of 3.5 to 3.6 per inch, meaning a 3-inch layer has an R-value of around 10.5 to 11. Therefore, open-cell insulation is an excellent option for those looking to insulate their homes on a budget.

If you’re looking for a higher level of insulation, closed-cell spray foam insulation may be the way to go. In Maine, closed-cell insulation costs range from $1.10 to $1.60 per board foot. Each sprayed layer of closed-cell foam insulation expands to about one inch, with an R-value of around 7. Exterior walls may require up to 3 inches of closed-cell insulation, with an R-value of about 21. Attics typically need 3 inches, with an R-value of 21 to 5 inches, with an R-value of 35. Closed-cell insulation is an excellent option for homeowners living in frigid areas.

The Size of Your Maine Home Matters

It’s also worth noting that the cost of spray foam insulation can vary depending on the size of your home and the number of walls and ceilings you want to insulate. Larger homes with square footage will likely require more insulation, resulting in a higher overall cost. At the same time, the type of insulation you choose will also impact the cost of your project.

What Else Affects Spray Foam Insulation Costs?

A few other factors may also affect the cost of your spray foam insulation project. For example, suppose you have an older home or one that requires additional prep work before insulation can be installed. In that case, you may need to pay extra for necessary repairs or installations. 

Additionally, the accessibility of the walls, ceilings, or floors you’re insulating can impact the cost of your project.


The spray foam insulation cost for your Maine home will depend on various factors. For instance, the type of insulation you choose, the size of your home, and the accessibility of your walls and ceilings will all impact the cost of your project. 

However, understanding the average price of open and closed-cell insulation allows you to decide the best insulation option for your home. Investing in spray foam insulation can help you save money on your heating bill and keep your home comfortable year-round.

If you’re ready to learn whether your home is ready for spray foam insulation (and prepare for the hot summer and cold winter ahead), get a free quote from Seal It Insulation Systems today!

Our Professional Memberships