Insulation Cost of A Garage With Spray Foam Insulation (Closed-Cell)

Are you wondering how much it would cost you to insulate your garage? Do you know your garage also adds to the high energy cost in your home because it is not properly insulated? Garage insulation is just as important as insulating any other part of your home. 

In this article, we will discuss the garage insulation cost for different parts of a garage, like the walls, attic, and doors. Also, we will evaluate the cost of spray foam insulation in the garage based on the size of the garage. 

Spray Foam Garage Insulation Cost By Number of Cars

Many homeowners relate the size of their garage to the number of cars it can contain rather than the size of its total square feet. The cost of an insulated garage is nothing compared to the benefits that it provides. The average cost to insulate a garage is between $1500 to $7000, according to the national average.

The number of cars a garage can comfortably house can be used to calculate the cost of insulating the garage, and it is the same in terms of square footage. Also, the cost to spray foam a garage is higher than most insulation types, but it is the most effective method.

Spray Foam Garage Insulation Cost By Number of Cars Table

Cost to Insulate 1-Car Garage

A 1- Car garage is assumed to have a standard size of 12’ x 20’, and the garage insulation cost for this size of the garage is from $580 to $6500. The wide range in the cost of insulation is mainly because of the type of insulation material used. 

Using spray foam insulation for a single-car garage will cost $3.5 to $7.5 per sq foot. It would cost $7.5 per sq foot for closed-cell spray foam insulation. Therefore, a single-car garage with an assumed dimension of 12’x20’ would cost $1800, but the garage insulation cost is usually from $580 to $6500. The cost of insulating the doors and walls of the garage would cause a higher amount of square footage to be insulated. 

Cost to Insulate 2-Car Garage

The dimension of a 2-car garage is assumed to be 20’x20’, and the cost to insulate 2-car  garage insulation lies within the range of $800 and $9200. The dimensions of your 2-car garage can have varying costs, as bigger dimensions would require higher insulation costs. Closed-cell spray foam insulation for your 2-car garage would cost more than open-cell spray foam insulation.

Cost to Insulate 3-Car Garage

A 3-car garage is assumed to have a dimension of 20’x30’. The cost to insulate a 3-car garage is within the range of $1050 to $12300. The 3-car garage is a common type of garage that is used for car storage or in work areas. Closed-cell spray foam insulation offers a higher R-value, and it should be used for proper garage insulation.

Spray Foam Garage Insulation Cost By Size

As mentioned earlier, the garage insulation cost is dependent on the size of the garage and the type of insulation used. The size of a garage will determine the number of cars it can hold, and the size of most garages is usually between 240 sq ft and 800sq ft.

Spray Foam Garage Insulation Cost By Size Table

Spray foam insulation offers a higher R-value than other insulation types, and seals the garage air leaks. The average cost of spray foam insulation per sq foot for garage insulation is between $3.15 and  $7.5. There are 4 common types of garages based on their sizes, and they are;

  • 12’ x 20’  (240 sq ft)
  • 20’ x 20’  (400 sq ft)
  • 20’ x 30’ (600 sq ft)
  • 20’ x 40’ ( 800 sq ft)

Cost to Insulate 240 Sq Ft Garage (12'x20')

The 12’ x 20’ garage is a small garage, and it is made to comfortably house one car. The cost to insulate a 240 sq ft garage is the cost of insulation multiplied by the size of the garage, which is between $756 to $1800. Moreover, the insulation cost is usually between $580 and $6500 because the walls and ceiling of the garage add to the area that is to be insulated 

Cost to Insulate 400 Sq Ft Garage (20'x20')

The cost to insulate 400 sq ft garage is between the range of  $800 and $9200. 

Cost to Insulate 600 Sq Ft Garage (20'x30')

The cost to insulate a 600 sq ft garage is between the range of  $1050 and $12300.

Cost to Insulate 800 Sq Ft Garage (12'x40')

The cost to insulate an 800 sq ft garage is between the range of  $1280 and $14800.

Spray Foam Average Cost to Insulate a Garage By Part

A garage is made up of 5 main parts; the door, roof, ceiling, attic, and wall. Getting familiar with the different parts of your garage and properly insulating them will save energy costs. Spray foam insulation is a good insulation choice for sealing air leaks in different parts of the garage.

In this section, we will discuss the cost of using spray foam to insulate different parts of the garage and insulated garage door prices.

Garage Door Insulation Cost

The garage door requires proper insulation and is a major source for transferring heat between the garage and the environment. One major factor that determines an insulated garage door cost is the type of door and the size of the door. For example, an insulated glass garage door cost more than a basic steel door.

Garage door insulation cost is different in terms of size. There are different sizes of garage doors made to suit different purposes. The common sizes of garage doors are 8’ x 7’ doors, 9’ x 9’, 10’ x 10’, 12’ x 7’, 12’ x 12’, 16’ x 7’, and 16 x 8’ doors. As you would expect, the bigger the size of the door, the more expensive the garage door is. In essence, 12 x 12 insulated garage door prices are more expensive than the 10x10 insulated garage door price. The following are the average cost of insulated garage doors based on their sizes;

  • 8’ x 7’ insulated garage door price is between $400 and $900
  • 9’ x 9’ insulated garage door price is between $450 and $1000
  • 10’ x 10’ insulated garage door price is between $490 and $1100
  • 12’ x 7’ insulated garage door price is between $500 and $1300
  • 12’ x 12’ insulated garage door price is between $600 and $1500
  • 16’ x 7’ insulated garage door price is between $650 and $3600
  • 16’ x 8’ insulated garage door price is between $700 and $5000

Garage Attic Insulation Cost

The attic of your garage requires insulation because it is also a source of heat transfer to the environment. For a 2-car garage, the cost to insulate garage attic using spray foam insulation is between $500 and $3000. Garage attic insulation cost will vary with the size of the attic, which means a bigger attic will cost more to insulate. Also, see our article about the benefits of attic insulation.

Garage Ceiling Insulation Cost

The cost to insulate garage ceiling is within the range of $260 and $3000. The wide range in cost is because of the different insulation methods that can be used to insulate the garage ceiling. A garage ceiling can be insulated using different methods, but spray foam insulation is the perfect insulation if you do not care about the cost. A cheap way to insulate garage ceilings is by using batts or the blow-in insulation method.

Garage Wall Insulation Cost

The cost to insulate garage walls is between $550 and $15000. The size of the garage wall will determine the amount of insulation required for proper insulation. For example, the cost of insulating a 2-car garage with a  dimension of 20’ x 20’ is within the range of $780 and $9000. A garage wall can be insulated using any type of insulating material, but spray foam insulation provides the best and most efficient insulation for your garage. Click for more detailed information about wall insulation with spray foam.

Garage Roof Insulation Cost

Garage roof insulation cost is between $1600 and $3000 for an average 2-car garage. The cost of insulation can differ because of the size and type of roof used. 

What R-Value Insulation Is Best For Garage?

R-value is the measure of the resistance to conductive heat flow of a material. The R-value required for your garage depends on your location because different locations require a certain R-value to achieve a conducive temperature. In other words, the higher the R-value, the warmer the garage will be. 

Spray foam insulation is the best insulation material for your garage in terms of R-value. Spray foam insulation offers the highest R-value, with open-cell spray foam having an R-value of up to 3.9 per inch thickness, while closed-cell spray foam is R7 per inch.

Cost to Insulate and Drywall Garage

One significant advantage of using spray foam insulation to insulate garage walls is that it can be used whether the wall is drywalled or not. Installing spray foam on a dry-walled garage cost more than applying spray foam on an unfinished wall. The cost to insulate and drywall garage is between $3000 and $4000, while for an unfinished wall is between $2000 and $4000.

Labor Cost For Spray Foam Garage Insulation

Labor cost for spray foam garage insulation by professional costs between $50/hr to $100/hr. Spray foam insulation can be applied by following the right DIY procedure and using the FastCoat product. This saves the cost of getting a professional to do the job. 

The type of insulation used will determine the labor cost. Labor costs for other insulation types are measured in the area covered in sq ft. For example, the labor cost for a 2-car garage will cost between $300 and $4000, depending on the type of insulation applied. 

Conclusion

You now have an idea of the garage insulation cost for the different parts of the garage using spray foam insulation. Insulating your garage makes it useful for other purposes other than parking cars. The garage can be used as a workspace, dance studio, etc., as insulating with spray foam reduces noise and smell from the environment. 

As homeowners, knowledge about the garage insulation cost helps you determine the right insulation that fits your budget. Spray foam insulation is divided into open-cell spray foam and closed-cell spray foam; the closed-cell spray foam has a higher R-value, but it is more expensive than the open-cell spray foam. 

You can choose to install spray foam yourself to save labor costs by getting the FastCoat product, the right pieces of equipment, and diligently following the DIY process. Spray foam insulation is ideal for your garage as it can last up to a lifetime, and most importantly, it reduces energy consumption in your home. 

FAQ 

How Much Does It Cost to Add Insulation to A Garage?

According to the National average, adding insulation to your garage would cost between $1500 to $7000. The cost of adding insulation to your garage depends on the size of the garage and the type of insulation used. Another criterion is the type of wall in the garage, whether it is an unfinished wall or drywall. 

What Insulation Is Best For Garage?

Spray foam insulation is the best insulation for your garage because it has a higher R-value than other insulation types.  

Can I Insulate My Garage Myself?

Yes, you can insulate your garage by using the FastCoat product and following the DIY process carefully.

How Much Does It Cost To Insulate A Garage Ceiling?

The cost to insulate a garage ceiling is between $260 to $3000 for a 2-car garage. The varying cost of insulating the garage is because of the different insulation types and the size of the garage. Fiberglass insulation cost is not the same as using spray foam insulation, and the bigger the size of the garage, the higher the cost of insulation. 

How Much Does It Cost to Insulate A 20 X 20 Garage?

A 20’ x 20’ garage has an area of 400sq ft, and the average cost is between $780 and $9000. 

Is Garage Insulation Worth It?

Insulating your garage is worth the cost because it makes your garage conducive, maximizes energy efficiency in your home, and saves energy costs. 

Will Insulating My Garage Keep It Warmer?

Yes, insulating your garage with the right R-value keeps it warm during harsh weather conditions. 

What R-Value Do I Need For Garage?

The right R-value for your garage depends on the climate condition of your location. If you use your garage for more parking cars, R14 to R16 is used in most areas.

Does Insulating A Garage Door Make A Difference?

Insulated garage doors have multiple layers, unlike uninsulated ones with just one layer of hard material. They are designed to have insulation between two layers of hard materials like glass or steel. Insulating your garage door or getting an insulated door makes the garage more comfortable. Insulated garage doors also save energy consumption more than uninsulated garage doors. 

What Is The Best Way to Insulate A Garage Door?

The best way to insulate your garage door is by using door insulation kits containing vinyl or foil-faced batts. Garage door insulation kit prices are around $50 or more, but they come with all the necessary supplies like adhesives, tape, gloves, and even a nose mask.

Does It Make Sense to Insulate An Unheated Garage?

Yes, it does. An unheated garage makes it unbearable to stay in during winter, and the cold can also stop the car battery from working properly. Insulating an unheated garage makes the garage conducive at all times and seasons.


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Author : Krakenbond Team

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